eChapters

for limitation of world fresh water supply, farmland availability, salinity ingression and the pressing future need of food supply. The cultivation of salttolerant crops on saline soil and with saline waters has significant social and economic potential. It is often argued that fresh water agriculture near rivers and ponds was invented because of the need to sustain people and communities. Saline water agriculture is going to be needed for sustaining our future generations and civilization.
FROM DESALINATION OF SEA WATER TO SEA WATER AGRICULTURE
Sea water contains nearly 35000 ppm of dissolved salts. There has been great deal of interest world wide on desalination of sea and brackish water to safe drinking water. In early 1960s the young President of USA John Kennedy put forward two famous challenges for the scientists (1) Landing the man on moon and (2) Producing desalinated water at low and competitive cost. It is often said that the first challenge was met but the second one has been more difficult! With tremendous support and interest, work on desalination was taken up worldwide. Newer processes were being tried. At the Environmental Research Lab of University of Arizona and at Central Salt and Marine Chemicals Research Institute, Bhavnagar simultaneously solar powered HD (humidification – dehumidification) process of Desalination was developed and pilot plants were commissioned. It was however realized that desalinated water was costly and not easily applicable to most coastal communities, though for many countries in middle east with no alternative water source and cheap petroleum energy – it is applicable on a very large scale.

“Where is your Dhoti, Dr. Mehta ?” Dr. Varghese Kurien surprised me as I entered his office at IRMA (Institute of Rural Management Anand). That was April 2000, soon after I had taken over as the Vice Chancellor of the erstwhile Gujarat Agricultural University (GAU) and had decided to call on him during my visit to the Anand Campus. (At that time GAU was the largest University in Asia with four main campuses – Dantiwada, Anand, Junagadh and Navsari and about 65 experimental farms / stations spreaded all over). Earlier, I did have some interactions with Dr. Kurien. When at GSFC Ltd., we had introduced Nylon – 6 Engineering plastic. I had discussed with my team of Research and Application Development Engineers about multi layer packaging of dairy products where Nylon – 6 can have a good market potential which we used to discuss with Amul. Also, our work on Bio Fertilizers and Bio Pesticides had indirect interest to them. So, when suddenly I was offered the position of Vice Chancellor of GAU and was in a dilemma, I went for his advice. After all, he had held the same position earlier (in addition to AMUL). I explained about the offer and said that I was not too sure about accepting it. He, on the contrary, encouraged me to accept it saying “you can do a lot !” I just murmured,” But I am not an agriculture graduate. I am a Chemical Engineer!” To which he jokingly said – “So ?. I am a Metallurgical Engineer. And now I am a Dudhwala!”

To most of us Prof. Swaminathan was a great Scientist, humanist and true global leader. I am blessed to have been associated with Prof. Swaminathan. From a brilliant scholar to a visionary global leader, he had continuously moved to higher and higher level of achievements. The nine decades of his life can be divided in 4 phases – Brilliant & dreamy student, devoted scientist and Science Manager, a visionary and missionary solving the hunger problem and a global citizen and humanist. The vision and drive had taken him to extraordinary heights – Like Maharshi Patanjali has said in Yoga Sutra– “When you are inspired by some great purpose, some extraordinary vision, all your thoughts break their bond. Your mind transcends limitations, your consciousness expands in every direction and you find yourself in a new, great wonderful world.” Among many things, I also recollect his inspiration when I was planning GSFC Science Foundation and later the activities of Gujarat Agricultural University.

In contrast to the traditional universities, agricultural universities have been entrusted with the Herculean task of technology dissemination at the grass root level such that the package of practices evolved by the agricultural scientists should reach out the end-users, viz. farmers , for adopting in the field, with consequent increment in the farm productivity and farmer’s income. This unique mandate has been assigned to agricultural universities on the pattern of land grant colleges of the United States. Such vision and trust, envisaged by Pandit Jawaharlal Nehru and his devout lieutenants, herald creation of state agricultural universities (SAUs) in the early 1960s. The key role played by SAUs in the first green revolution and agricultural human resources development have been regarded as the milestones in the history of India post-independence, that made the country self-sufficient in food production and, in turn, to self reliance in milk, vegetables, fruits and inland fish production. Today, India has set fourth into commanding position as a global economic power, with primary and secondary sectors, viz. agriculture and industry, contributing modestly. At the current pace of the growth rate, I would not hesitate to predict that by the year 2020, we will accomplish the top lines both in terms of productivity and sustainability, by transforming hitherto deemed liability of population into a formidable asset of human resource capital.
Hunger-free World
Agriculture is a vital development tool for achieving the Millennium Development Goals that call for halving by 2015 the number of people, suffering from extreme poverty and hunger. We also note that more than 50% of the people in the world are small and resource-poor farmers and another 20% rural land less. The challenge is to transform this

In the last several decades many international forums and institutions have discussed and agreed that food and water security are the most important issues for the future. The damage to the ecology directly affects the food, land, water, health and the livelihood. Agricultural progress serves as the best way to fight poverty, hunger and livelihood problems. Though in the last few decades, billions of pages about hunger, food and water security have been written, thousands of conferences have been organized, the urgency of action plans and creating holistic models is the most important need. For this, we must require bold reforms and action oriented programs which can reach the smallest farmers and give an optimistic signal rather than a despondent picture. Developmental models that are holistic and close to nature, sustainable and based on inclusiveness considering ‘unto the last’ women and man are the need of the day. Land and water together with biodiversity and atmosphere conditions are the foundations for sustainable food security. The ecological damage to these foundations are leading to lowering of productivity and livelihood. This will further aggregate with the threat of climate changes such as temperature, rain falls and sea level rise. As per the exercise by World Food Program, it is indicated that the green revolution states like Punjab and Haryana may become food insecure in another 20 years. Food insecurity is measure in terms of land degradation and salinization, ground water tables and green cover loss. *Based on Key Note address at Global Water Meet for Climate Change Adaptation – Agrarian Perspectives : 24 – 26 OCT. 2016 – UAS – DHARWAD – INDIA
Our Soils
The year 2015 was declared ‘ The International Year of Soil’. This is understandable. A healthy soil is key to farm productivity and healthy life (Annexure – 1). In India, out of 306 m. ha reported under various land uses,

It is well understood that the impact of climate change on agriculture and food security will be critical. The variation in climate influences the productivity of crops, livestocks and fisheries.
The major points to remember are
Climate changes are increasingly impacting agriculture and food security adversely.
Cereal productivity may decrease by 10 – 40% by 2100.
Negative effect on livestock productivity and increased disease.
Achieving Millennium Development Goals (MDG) will become more difficult.
Further, it is also estimated that : Cost of Climate Change will be equivalent of loosing 5 to 20% of GDP (N. Stern : World Bank).Sustainable Agriculture practice could absorb a third of the CO2. Globally, about 800 m $ / day is spent on direct / indirect subsidies. Among other things, it is suggested that encouraging Eco Agriculture is the way out. We must transform 1.5 b ha into Eco / Agri Farming. Small farmers to play BIG role. At the COP28 summit in Dubai, food and agriculture declaration was signed by over 130 world leaders on Sustainable Agriculture and a commitment to mobilize over $2.5 billion to tackle climate issues related to agriculture
COP and 4 per 1000 initiative
Conference of the Parties (COP) to the UNFCC (United Nations Frame Work on Climate Change) has been making significant efforts to mitigate the adverse climate change efforts. At COP 21 in Paris, a landmark agreement was reached to combat climate change and accelerate actions for sustainable low carbon future. COP 22 at Morocco will focus on short, medium and long

Agriculture is increasingly being looked through the angle of environment and sustainability now. On global scale, the move is towards a balanced need for food production and ecological factors. Green revolution made a huge contribution for food security but now we face the following challenges.
1. Since the green revolution, land has witnessed an indiscriminate and prolonged use of chemicals and the strong need for moving away to more eco-friendly farming is felt.
2. We need to promote eco technologies which integrate the principles of ecology in technology development and dissemination. We also need to promote production and use of biological software for sustainable agriculture and food security.
Therefore, the terms like Regenerative Agriculture, Nature base solutions, Agro Ecology, Eco Agriculture, Conservation Agriculture, Organic Farming, Holistic Resource Management, Climate Smart Agriculture, Prakrutik Kheti etc etc have been gaining prominence in policy and funding spaces related to food systems. Global policy floors like the UN Food Systems Summit and the UN Climate and biodiversity conferences have used these terms as bywords for Sustainable Development. Different Names – Eco Agriculture Revolution Encompasses all ! Regenerative Agriculture is defined by many in ways that closely resemble Agro Ecology / Eco Agriculture. Broadly it describes farming, ranching and pastoral practices that stabilize our planet’s climate and carbon cycles by rehabilitating organic matter and microbial activity in the soil, thereby increasing carbon storage, retaining moisture and safeguarding bio diversity and living systems.

It is well recognized that sustainable management and sustainable livelihoods are inseparable. If neglected and if the present trends are not corrected in time, everyone’s future is threated. On the other hand, there is increasing recognition of living examples and demonstrated evidences of how the eco agricultural practices can help provide a solution to some of the major problems of today and tomorrow. Also, the main stream international agencies are emphasizing that agro-ecological approaches are the way forward. What the policy makers, farmers and people would like to know is How !it has been our experience that is most countries of the developing world the answer to ‘How’ of eco-agricultural is being demanded! In January 2016, a global team was invited by the office of Prime Minister of India to discuss and prepare an approach paper on Agro-ecology ( or Eco Agriculture including Organic farming). The team consisted of J. Fagan, Hans Harren, M.H. Mehta and A. Thimmaiah who after intensive discussions had prepared several presentations – first given to the group of top officials of Government of India departments and institutions as organized through the office of the prime minister. This was later followed by a meeting with Prime Minister Modi. During this meeting, the clear question asked was, “You need not convince us that agro ecology and organic farming are the way forward, but the question is how? How do we expand this system to national scale ?”

After the Green Revolution, it is now time for an Ever-Green Revolution based on Eco Agriculture or Agroecology. In 2018, the FAO described Agroecology/Eco Agriculture as a means to transform food and agriculture systems by addressing root causes and emphasizing the improvement of efficiency in resource use, conserving, protecting and improving livelihoods, promoting equality and well-being and enhancing the resilience of people, communities and ecosystems. A timely transition to a sustainable eco-agriculture approach is essential to protect food security, the well-being of people and farmers prosperity. Eco Agriculture is a broad term that can inclusively refer to agroecology, regenerative, organic, natural, jaivik, etc, and is increasingly being recognized as the way to help save the planet. While discussing this with Prof Swaminathan and the ICFA team, the idea of a Working Group emerged. When I was requested to form the Eco Agri Working Group through ICFA, I consulted with different sectors and tried to determine the “why” and “how” of the impending Eco Agri Revolution.
WHY
The past sixty years led to Green Revolution and alongwith that ‘success’ several adverse impacts and the changing global situation as noted in Table – 1 are the reasons for the need for an Evergreen Revolution based on Eco Agriculture

Introduction 
A broad definition of bioprocessing is the process of creating a valuable product from a live source. The system’s most important element is that the source organism is living and sensitive to its surroundings. Accordingly, the framework states that it will respond to relatively small changes in its physico-chemical environment by modifying its physiology to maximise efficiency. The use of entire cells and enzymes to catalyse bioprocesses in industrial settings is becoming more popular these days than conventional chemical synthetic methods. Among the many benefits of biotransformations in this context are their extensive substrate portfolio (including liquid, solid, and gas waste), one-pot reactions in mild circumstances and environmental friendliness. However, a number of drawbacks, including the unstable nature of biocatalysts and subpar performance in specific reaction conditions, the low solubility of some substrates in the reaction medium, substantial production expenses brought on by intricate downstream processing and product isolation and the lack of expertise in microbiology or bioprocess design, frequently make it difficult to scale up bioprocesses from the lab to the manufacturing facility. There is a growing need for innovative bioprocesses that can get over the aforementioned obstacle in industrial and environmental biotechnology in order to create effective, sustainable, and affordable processes. As a result, the industrial sector requires new methods that use biocatalysts that are highly active and stable under a variety of reaction conditions (typically accomplished through metabolic engineering), boost feedstock utilisation by using inexpensive waste resources, use green chemistry solutions that enable the use of fewer toxic solvents and reagents, or develop cost-effective biorefinery concepts that can transform industrial waste and byproducts into products with added value, thereby establishing new value chains. Figure 1.1 shows the three stages of a typical bioprocess: upstream processing, bioreaction and downstream processing which includes separation and purification steps. Every stage of these phases offers multiple chances to enhance a certain bioprocess.

Introduction
Wide range of industrially important products such as antibiotics, vitamins, enzymes, polymers, amino acids, biofuels are produced by microbes in extremely small quantities. Using microbial strains that generate an elevated amount of the intended product is a prerequisite for effective biotechnological procedures at the industrial scale. But since this isn’t an intrinsic feature of the chosen microorganism, changes to their genetic makeup may help to navigate this. Therefore, in order to overproduce the target metabolite and increase process efficiency, industrially relevant microorganisms are exposed to a range of treatments employing physical, chemical, or genetic methods. Thus, microbial strain improvement is the process of improving the biosynthetic capacities of microorganisms to generate the desired product in greater quantities.
Recycling resources and promoting sustainable development have grown in importance in recent years. Cosmetics, food, fuels, lubricants, plastics, drinks, fibres, and medications are just a few of the goods that are being biosynthesised due to the growing popularity of biological production of commercially significant metabolites (Kaur et al., 2012). The rising bioeconomy’s success hinges on our capacity to produce high-performing strains efficiently and economically. One successful strain engineering strategy is the Design–Build– Test–Learn (DBTL) framework. The strain engineering process must be viewed from the perspective of optimising the entire cycle rather than just increasing productivity at each stage, if strain development time and cost is to drastically cut down. We suggest a strategy that incorporates all four phases of the DBTL cycle and leverages the latest developments in phenotyping techniques, high-throughput genome engineering, computational design, and machine learning tools to forecast strain scale-up efficiency. By substituting sustainable alternatives made from renewable feedstock for petroleum-based products and ingredients derived from animals or wild-harvested plants, microbial biomanufacturing of chemicals, materials and biomolecules promises to lower greenhouse gas emissions, enhance land use and promote sustainability. But doing so necessitates creating reliable and effective industrial strains that can generate a variety of goods at reasonable costs. Enhancing the effectiveness of the strain engineering process is necessary to lower development cost, time in order to take advantage of market potential in all bioeconomy industries.
Over the past few decades, technical advancements in genome engineering have significantly boosted our capacity to engineer biological systems. The strain engineering process has been significantly sped and enhanced by synthetic biology methods like as genome editing using CRISPR (clustered

Introduction
The eco-friendly and commercially sustainable production has been a crucial aspect of modern commercial development. The ecologically sustainable microbial production of value-added products has seen rapid growth across multiple sectors, such as food, pharmaceuticals, and energy, resulting in notable economic benefits and social advancements on a global scale (Shi et al., 2022). The development of “omics” technologies has aided the improvement of microbial production processes through diverse omics procedures, such as genomics, transcriptomics, metabolomics, and systems biology (Amer and Baidoo, 2021). These omics approaches give important understandings into the widespread metabolic variations, thereby identifying the factors that affect microbial production efficiency and improving the understanding of targeted optimization strategies. The integration of omics approaches is considered essential for any strategies that aim to be industrially sustainable. Industrial activities depend on the cultivation and accessibility of significantly competent microbial species to optimize bioproduct yields (Keasling, 2012). Recent progress in the industrial generation of value-added products heavily depends on strategies rooted in omics. Typically, the industry can achieve cost-effective production of limited quantities of biopharmaceuticals (Harris et al., 2015). Nevertheless, to sustainably scale up production capacities, economically feasible alternatives must be planned, standardised, and developed. Over the past few decades, microbes with enhanced abilities for superior product generation have been identified (Babar et al., 2018; Kim et al., 2015). Latest improvements in metabolic engineering have aided the manipulation of various genetic components, including coding and regulatory regions, to maximize commercial benefits (Babar et al., 2018). Genomic methodologies aim to investigate the variations among individuals at both the germline and somatic levels by sequencing specific genomes. The transition from DNA microarray technology to DNA sequencing has enabled the thorough sequencing of entire genomes, providing a detailed characterization of an organism’s genomic landscape (Dai and Shen, 2022) whereas, transcriptomics involves the analysis of mRNA, microRNAs, long non-coding RNAs, and circular RNAs. The methods used in transcriptomics are designed to identify and enumerate RNA molecules transcribed from a specific genome at a particular time. Proteomics on the other hand focuses on understanding the functional significance of all proteins expressed within a cell, tissue, or organism by examining the flow of information via protein signalling and metabolomics contributed a vital part in the development of bioprocesses by providing a comprehensive overview of metabolic activities (Horgan and Kenny, 2011; Petricoin et al., 2002). Synthetic biology contributes a vital part in the production of high-performance strains for microbial manufacturing. A variety of microorganisms including bacteria, fungi, and microalgae can be employed in microbial production. However, synthetic biology methods primarily emphasis on the balanced blueprint of biosynthetic metabolisms for target outcome, as well as the creation and standardisation of these pathways and the heterologous production of the biosynthetic components (Wan et al., 2023). These approaches include the optimisation of fermentation process, optimisation of medium composition, scale up of fermentation, optimization of cell growth for manufacture of desired product, and strategies to decrease feedback inhibition and product toxicity (Figure 3.1) (Wan et al., 2023; Zhang et al., 2022).

4.1 Introduction
4.1.1 Overview of Genomics in Biotechnology
The genome of an organism serves as the ‘blueprint of life’ (Baeza, 2024) and functions as an information repository (Goldman & Landweber, 2016), containing the necessary information for the synthesis of molecules, cells, and tissues (Abera et al., 2017). A study of the entire collection of genes within an organism’s genome is known as genomics (NIH, 2022; WHO, 2025). Genomics encompasses aspects of genetics, focusing on the comprehensive characterization of an organism’s entire set of genes rather than on individual genes (Baeza, 2024). The investigation of living organisms has undergone a transformation through the application of genomics and related fields, providing unique insights that enhance various applications aimed at improving human life, economic conditions (Kalaitzandonakes et al., 2023), and environmental sustainability (Mudaliar et al., 2023).
According to a genomic analysis, 80% of the 6,000 rare disorders have genetic causes (Brittain et al., 2017). Cancer, a genetic disease, has revealed through DNA sequencing the mutational events and oncogenic drivers (D. Wang et al., 2023). Genomic tests contribute significantly to the prediction and prevention of diseases, including familial hypercholesterolaemia (FH) (Brittain et al., 2017). Agricultural industries are currently confronting multiple challenges, including global changes in climate (Bai et al., 2024), growing populations (Putri et al., 2019), resource depletion (Feng et al., 2023), reduction of cultivable land (Mirzabaev et al., 2023), and the prevalence of pathogens (Hossain & Roslan, 2023). Advances in genomic technologies, such as DNA sequencing and gene editing, have transformed the field. DNA sequencing includes; Nextgeneration sequencing (NGS) (Marudamuthu et al., 2023), Ribonucleic acid sequencing (RNA-seq) (Upton et al., 2023), whereas, gene editing methods includes; Clustered Regularly Interspaced Short Palindromic Repeat- CRISPR associated protein 9 (CRISPR/ Cas9) (Q. Liu et al., 2021), Transcription activator-like effector nucleases (TALENS) Zinc-finger nucleases (ZNF) (Malzahn et al., 2017) and Oligonucleotide directed mutagenesis (ODM) (Ravikiran et al., 2025) as well as doubled haploids (Chen et al., 2024), molecular markers (Kumar et al., 2024) and mapping populations (Temesgen, 2021), offers potential solutions against such agricultural challenges (Hossain & Roslan, 2023). Genome sequencing techniques are applied to various fields of industrial biotechnology such as; strain development or improvement (Salazar-Cerezo et al., 2023), enzyme discovery (Zaparucha et al., 2018) and analysis of microbial community (Hosokawa et al., 2022). The potential to enhance microbial strains through the incorporation, deletion, or alteration of

5.1 Introduction
Bioprocess engineering is becoming more advanced form of technology due to the many changes taking place in the field. The world is in dire need for creative, well thought out, and innovative approaches to problems associated with sustainable biomanufacturing, treatment customization, and the production of bio-based goods. One of the most notable advancements is the rise of synthetic biology, which allows for bioproduction at unprecedented levels where microbes could be modified for better bioproduction. More traditional approaches is strain improvement and metabolic engineering, which revolve around mutation-based processes and other forms of gene transfer technologies. The applications of new, non-traditional methods such as machine learning and artificial intelligence have completely revolutionized the way bioprocessing and its monitoring, as well as optimization, is done. On top of that, the drive towards sustainability has further motivated the use of green bioprocessing techniques which aim to minimize environmental harm. In parallel with these advances, regenerative medicine and gene treatment is opening doors to a new era of personalized medicine. In a world where change is constant, these accomplishments and innovations help us to take full advantage of what bioprocess engineering has to offer, as well as face the intricate challenges that the modern world encounters (Awasthi, 2022). In recent years, the field of biotechnology has undergone transformative and profound change that is marked by new breakthroughs and improvement which can affect several fields such as medicine, agriculture, and ecology. The emergence of tools like CRISPR-Cas9, synthetic biology, bioprinting, precision medicine and regenerative medicine are some of the new trends in biotechnology. These changes are recognizing the limits on the biological sciences and expanding them at the same time. Synthetic biology is another technology that includes the strategy and production of new genomic parts, related tools, and re-designs of traditional ones for valuable purposes. The scientists are modifying living organisms to perform useful functions like manufacturing biofuels or pharmaceuticals. Synthetic biology raises concerns about biosecurity and the unintentional release of artificial organisms into the environment, despite its enormous potential to address global challenges like renewable energy and sustainable resource usage (Jain, 2022). This article introduces advancements in bioprocess engineering with specific focus on advancements brought about by emergence of CRISPR. Bioprocess engineering is the application of process engineering principles to biological systems and has been a multidisciplinary field unto itself. Since its isolation as a groundbreaking genome-editing system, CRISPR has vastly improved the precision, efficiency, and scalability of both microbial and mammalian cell manipulation. This has resulted in numerous breakthroughs in pharmaceuticals, biofuels, and industrial enzymes, a major milestone for synthetic biology, and metabolic engineering (Jinek et al., 2012). The CRISPR revolution has changed

6.1 Introduction 
Lignocellulosic Biomass (LCB) generated from the global consumption of fruit and vegetables rapidly generates approximately 140 billion metric tons of agricultural waste. Environmental pollution associated with these wastes, like land pollution, and increased greenhouse gas emissions, can be reduced through the bioconversion of wastes (renewable biomass resources) into value-added products in biorefineries (Babu et al., 2022). These value-added products synthesized for utilization in industries such as biofuels, biomaterials, or biochemicals are effective, reuseable, and enhance sustainability. These bioproducts are recuperated into useful biomolecules and oils for the food industries and dyes for the textile industries. The sustainability of these products can be acquired efficiently through costeffective pretreatments and bioprocess optimization methods (Haldar et al., 2020). The initial stage of value product chain development is the process modelling and optimizing, which, due to its complex nature and large scale, faces challenges in raw material availability, cost competitiveness, upscaling, and lack of technological maturity (Gerassimidou et al., 2021). Optimization of production processes like fermentation and chemical synthesis for manufacturing value-added products has become a focal point in research enhancement of biorefineries. There has been a revolution in the technology used in process designing and manufacturing practices in biorefineries. Advanced Artificial Intelligence (AI)-based approaches like Genetic Algorithm (GA), Fuzzy Inference System (FIS), and Artificial Neural Network (ANN) are being utilized along with conventional tools to optimize variables interacting in production processes. These techniques increase overall efficiency and enhance prediction accuracy and output of value-added products (Banerjee et al., 2025). Optimization of the bio processes enables higher productivity in parallel with lower environmental burdens. AI-based approaches integrated with conventional approaches need a large amount of experimental historical data to be successfully carried out (Arias et al., 2023). Advancement of biorefineries due to the rapid demand of value-added products as well as a solution to the greenhouse emissions, the integrated application of AI for process analysis needs to be understood. This chapter is a contribution towards upscaling the current knowledge base related to different approaches for the enhancement of production for value-added products. The chapter discusses the conventional techniques for value-added production and various optimization models. There is further discussion of advancements in the traditional approach using AI-based approaches and their features and benefits in biorefinery. Apart from different AI-based models, AI integrated with life cycle analysis for sustainability is also briefed. Finally, the chapter addresses current limitations in the field and outlines potential future directions for research and development.

7.1 Introduction 
The global economy of today magnifies the extend and scope of product safety issues for a wide range of items, from food and medicine to consumer goods, medical devices, and automobiles (Marucheck et al., 2011). Industrial globalization has raised awareness of the many risks and vulnerabilities that goods face as they move through the supply chain, from design and sourcing to manufacturing, shipping, distribution, and ultimate sale to the end user (Milovanovi? et al., 2017). These challenges necessitate the implementation of reliable and sustainable methods for producing goods. This can be achieved via biorefineries, which may reduce supply chain disruptions while promoting environmentally friendly resource utilization. Biorefineries are usually referred to as first and second generation biorefineries with accordance to the raw material utilized. The former uses food crop as raw material wherein the latter utilizes lignocellulosic and agricultural residues as raw material for generation of value-added products (Guo et al., 2015). Additionally, algae biomass is utilized in the third generation biorefineries (Parajuli et al., 2015). However, among these three the first generation are the most established while the second and third are still developing at various stages due to technical and economic challenges (Gerssen-Gondelach et al., 2014). Globally, ethanol biorefinery processing U.S. corn and Brazilian sugarcane dominate production contributing 52% and 28%, respectively (Renewable Fuels Association, 2023). These biorefineries are further distinguished based on categories such as sugars, oils and syngas which serve as key intermediates in production of bioethanol, glycerol or lactic acid (Calvo-Flores and Martin- Martinez, 2022). Additionally, these biorefineries utilizes feedstock and residues which can be derived from forest, sugar crops and oil crops. The processing technologies employing for utilization of such raw material are fermentation, gasification and pyrolysis. This configuration of biorefinery determines the integration and systematic pathway from raw feedstock to final product (Aristizábal?Marulanda et al., 2019). Furthermore, both the supply chain and value chain are significant part of biorefineries. The value chain stands for the value-oriented aspect of the process which is often derived by customer demand and include product innovation, marketing and value development (Sharma et al., 2013). In contrast, the supply chain focuses on the logistical flow of materials, encompassing the movement of raw materials from suppliers to end consumers. However, certain stages of supply chain overlap with biorefinery systems such as separate pretreatment and fermentation facilities (Sutduean et al., 2019). The design of biorefinery system involves a structural decision process at strategic, tactical and operational levels. These decisions are made with respect to various biohazards at each level. The macro-level strategic decisions, address long-term risk mitigating strategies to ensure overall safety (Chaturvedi et al., 2020). Once the high-level decisions are established, tactical and operational decisions are implemented. The tactical decisions focus on implementing safety measures with processes such as handling hazardous materials and optimizing biorefinery. While

8.1 Introduction
The increasing rate of waste generation due to consumption patterns has emerged as a significant environmental management challenge. The valorization of this waste hold great potential in production of bio-based products, provided they meet the multi-criteria of environmental sustainability and economic viability (Dragone et al., 2020). Within this framework, the advancement of biorefineries is considered to be a valuable strategy. These transform lignocellulosic biomass to valuable bio-based products including biofuels and biobased chemicals which promote circular economy (Mariana et al., 2021). The incorporation of biorefineries into the market value chain necessitates the establishment of production framework which aims high recovery and generation of value-added products from biomass (Meramo- Hurtado and González-Delgado, 2019). However, the upscaling of these biorefineries faces various challenges such as process efficiency and technological advancement. Additionally, the largescale operation of biorefineries requires consistent and stable biomass supply. Addressing these challenges require technological advancements and policy framework (Makepa and Chihobo, 2024). These could ensure the economic viability and profitability of biorefineries which is essential for their successful implementation in long-term sustainability goals (Arias et al., 2023). In this context, the early-stage evaluation comprises production capacity, market demand, technological limitations and environmental impact.
8.2 Challenges in Upscaling of Biorefineries
For fulfillment of the global demand for bio-based products it is important to upscale biorefineries from laboratory to industrial scale. Biorefineries are closely aligned with the United Nations Sustainable Development Goals (SDGs), as several SDGs emphasize the efficient and circular utilization of resources to promote sustainability. Additionally, SDSs promotes adoption of practices which encourage climate change mitigation, economic growth, societal well-being and advancements in research and innovations (Lange et al., 2021). However, the establishment of biorefineries faces various technical challenges similar to those encountered in conventional refinery plants. These challenges arise primarily due to the large volume of biomass required for processing to achieve industrial scale production of bioproducts (Ahmed et al., 2023).

9.1 Introduction 
Biochemical technology focuses on developing sustainable conversion of renewable materials like lignocellulosic wastes into value-added products with reduced emissions. The utilization of integrated bioprocess engineering for transforming carbon sources into diverse biotechnological products via microbial cells is an emerging field (Pais et al., 2016). Bioprocess engineering is a collection of thermodynamics, process simulation, bio-separations, microbiology, bioprocess kinetics, and systems engineering aiming for biomass conversion, biocatalysis-driven processing methods, and microbial processes. These processes can range from microscale to large-scale designs and systems (Liu et al., 2016) and generate value-added products such as biofuels like bioethanol, biodiesel, and biogas (Patel et al., 2022); in pharmaceuticals (Tsopanoglou et al., 2021), probiotics (Lei et al., 2024), textiles (Bahtiyar et al., 2021), bioplastics, and biopolymers (Pathom-aree et al., 2024). Reactor design, fermentation, kinetics, and optimization are integral to bioprocess engineering. Not always but the pretreatment methods for lignocellulosic waste and its improvement should be considered for an optimized bioprocess engineering as they are the carbon source during fermentation. Pretreatment methods are physical, chemical, biological, or hybrid of any three treatments used to acquire desired products. Cost-effective and relatively slow biological pretreatment needs microorganisms to convert lignocellulosic waste into useful desired products (Abo et al., 2019). Chemical pretreatment utilizes harsh chemicals to increase biomass degradation, porosity, and solid separation but unfortunately are rarely used due to the harmful effects (Arora et al., 2018). Physical pretreatment methods utilize mechanical pressure to break down biomass but are expensive and irregular. Pretreatment for source and strain acquisition is the initial step of upstream bioprocessing followed by reaction conditions and bioreactor design (John et al., 2020). The primary part of any upstream process is to produce the desired product like enzyme followed downstream processing such as purification of the value-added product. The value-added products are developed via fermentation in equipment known as Bioreactors. Different bioreactors being utilized recently in bioprocess engineering and biorefinery are membrane bioreactors that offer high productivity, low environmental impact, and high flexibility (Akkoyunlu et al., 2024); airlift bioreactors (Hernández- Acevedo et al., 2024); fixed bed/packed bed and fluidized bed bioreactors are being utilized for their potential of reduced expenses, simpler design, enhanced temperature regulation and homogenous mixing (Srivastava et al., 2022) (Figure 10.1). Despite their high production and safety, the traditional large-scale stainless-steel vessels batch-wise are often expensive, inflexible, and have long construction times. As an alternative to the costly route, single-use equipment was introduced. Since they are pre-sterilized and are readily accessible to purchase as needed, this disposal method offers great flexibility and lower investment costs by eliminating the need for sterilization. However, there is high waste generation leading to a dent in sustainability and circular bioeconomy (Frank, 2018). The transformative step of the production system shifting from batchwise to continuous production has ultimately led to a decreased environmental footprint and prices and increased product quality and yield (Gerstweiler et al., 2021). The cost of bioprocess engineering (upstream and downstream) is dependent on factors such as types of feedstocks, fermentation types like submerged and solid-state, product types, and microbe or enzyme types (Kumar

Throughout history, humanity has been locked in a perpetual struggle with the forces of nature, and one of the most insidious and destructive of these forces is drought. A creeping disaster that seeps into the very fabric of communities, drought leaves behind a trail of devastation and despair, testing the resilience of societies and pushing the boundaries of human endurance. From the ancient civilizations of Mesopotamia to modern-day cities, droughts have ravaged the landscape, claiming lives, destroying livelihoods, and reshaping the course of human history. • The impact of drought is far-reaching and multifaceted, affecting not just the environment, but also the economy, health, and overall wellbeing of individuals and communities. Crops wither and die, livestock perish, and entire ecosystems are disrupted, leading to food and water shortages that can have catastrophic consequences. The economic toll of drought can be equally devastating, as agriculture, industry, and tourism is severely impacted, leading to widespread unemployment and poverty. • What makes droughts particularly pernicious is their ability to unfold slowly, their effects accumulating over time,

Drought is a complex and multifaceted issue that affects various aspects of the environment, economy, and society. Its far-reaching consequences underscore the need for a comprehensive and collective approach to mitigate its impacts. 2.1 Drought Prone Area Delineation Drought-prone area delineation involves using scientific criteria like low and erratic rainfall, groundwater potential and agricultural indicators to identify regions susceptible to drought. Modern methods use GIS (Geographic Information Systems) to integrate data from satellite imagery, weather patterns, soil conditions, and vegetation to precisely map drought-vulnerable zones. This spatial analysis allows for targeted interventions such as improved water management techniques and sustainable agricultural practices in the most affected areas. Here are some additional details on the universal nature of drought and the benefits of a global response:

The 21st century has ushered in an era of unprecedented drought challenges, with far-reaching implications for global ecosystems, economies, and human societies. The increased frequency, severity, and duration of droughts worldwide have pushed water resources, agricultural systems, and communities to the brink, underscoring the pressing need for comprehensive understanding and proactive management. • One of the most striking aspects of modern droughts is their capacity to affect vast geographic areas, transcending national borders and impacting multiple sectors simultaneously. The 2012 drought in the United States, for instance, affected over 80% of the country, leading to significant economic losses in agriculture and beyond. Similarly, the 2018 Cape Town water crisis brought the city to the edge of “Day Zero,” where the taps would run dry, highlighting the devastating potential of droughts on urban water systems. • The impacts of droug

Droughts are intricate and multifaceted phenomena that can have far-reaching impacts on the environment, economy, and society. The complexity of droughts arises from the interplay of various factors, including climate variability, water availability, land use, and human activities. Given the varying characteristics and consequences of droughts, classification becomes a crucial step in understanding and managing these events. By categorizing droughts based on their severity, duration, and impact, researchers and policymakers can better grasp the intricacies of drought dynamics and develop targeted strategies for mitigation and adaptation. The classification of droughts is necessary for several reasons

Drought, a recurring and often devastating feature of climate variability, presents a unique challenge due to its slow onset, complex nature, and farreaching consequences. Unlike hazards with clear event boundaries, drought manifests across diverse spatial and temporal scales and impacts nearly every facet of the environment and human activity. Effectively understanding and managing this phenomenon necessitates an equally comprehensive approach: drought monitoring. This chapter introduces the essential concepts and methodologies underpinning this critical field, highlighting the remarkable breadth required to capture the full picture of drought conditions. • The scope of drought monitoring is inherently vast. Geographically, it spans from tracking localized water stress affecting a single farm or watershed to assessing conditions across entire regions, nations, and continents. Temporally, monitoring efforts must consider short-term deficits unfolding over weeks or months (critical for agriculture) as well as long-term hydrological imbalances developing over seasons, years, or even decades (impacting reservoirs and groundwater). Understanding current conditions crucially relies on comparing them against a deep historical context, requiring decades of baseline data

Drought Early Warning Systems (DEWS) form the essential foundation for effective and proactive drought management strategies. These systems are crucial in facilitating a fundamental shift from reactive approaches, where responses are implemented after the onset of a crisis, to proactive risk reduction measures that aim to anticipate and mitigate the adverse effects of drought before they fully materialize. By providing timely and accurate information about impending drought conditions, DEWS empower governments, communities, and individuals to make informed decisions and take preemptive actions, thereby minimizing the potential economic, social, and ecosystem losses associated with these events (Fig.6.1). Recognizing the risks posed by drought in a timely manner is of paramount importance for ensuring an effective and comprehensive response that can alleviate suffering and reduce overall vulnerability. The implementation of robust drought early warning systems plays a critical role in minimizing the negative consequences of drought and building longterm resilience to this recurring natural hazard.

Agricultural drought management is a critical aspect of ensuring food security and sustainable agricultural practices, particularly in regions prone to water scarcity. Droughts, characterized by prolonged periods of abnormally low rainfall, can have devastating effects on crop yields, livestock productivity, and the livelihoods of farmers. Effective drought management strategies are essential for mitigating these impacts and enhancing the resilience of agricultural systems. Agricultural drought occurs when the soil moisture is insufficient to meet the needs of crops, leading to reduced growth, lower yields, and increased plant stress. This type of drought can be particularly challenging because it directly affects food production and the agricultural economy. Unlike meteorological droughts, which are defined by the degree of dryness compared to normal conditions over a specific period, agricultural droughts focus on the impact of drought on crops and agricultural productivity.

Water is fundamental to life, supporting ecosystems, driving economies, and sustaining human well-being. However, the availability of this essential resource is increasingly threatened by hydrological drought, a complex phenomenon characterized by prolonged deficits in surface and subsurface water supplies. Unlike meteorological drought, which is defined by precipitation shortages, hydrological drought manifests as reduced stream flow, diminished lake and reservoir levels, and depleted groundwater, impacting water availability long after the rains have ceased. This chapter looks into the critical aspects of hydrological drought management, exploring the multifaceted nature of this challenge and outlining strategies to mitigate its devastating consequences. We will navigate the intricate web of factors that contribute to hydrological drought, from climatic drivers to the profound influence of human activities. Understanding these causes is paramount to developing effective management approaches.

The relentless march of urbanization, coupled with the growing uncertainties of a changing climate, casts a long shadow over the water security of our cities. Unlike their rural counterparts, urban areas face a distinct and often amplified set of challenges when drought strikes. The intricate web of municipal water supply, the concentrated demands of industry and commerce, and the sheer density of population render urban centers particularly vulnerable to the cascading impacts of water scarcity. When the taps run dry or restrictions tighten, the repercussions extend far beyond parched lawns and wilted gardens, impacting public health, economic stability, and the very fabric of urban life This chapter serves as an entry point into the critical field of urban drought management. We will delve into the unique characteristics that distinguish urban droughts from their rural counterparts, highlighting the interconnectedness of water systems and the amplified socioeconomic consequences within city limits. We will explore the increasing frequency and intensity of these events, driven by both natural climate variability and

The specter of climate change looms large over our planet, its influence permeating every aspect of the Earth’s systems. Among the most concerning manifestations of this global shift is the increasing frequency and severity of extreme weather events, and atmospheric droughts are emerging as a particularly insidious threat. The present chapter shines a spotlight on this critical intersection, meticulously dissecting how the profound alterations in our climate are fundamentally reshaping the dynamics of atmospheric moisture Going beyond traditional notions of drought rooted in soil dryness, this chapter will illuminate the concept of atmospheric drought – a state where the air itself becomes exceptionally parched, characterized by low relative humidity and a voracious atmospheric demand for moisture. We will unravel the intricate ways in which climate change acts as a catalyst for these conditions. Rising global temperatures amplify evaporation rates, while shifts in large-scale atmospheric circulation patterns can steer moisture-laden air away from v

Drought, characterized by prolonged periods of abnormally low rainfall, is a recurring and devastating natural phenomenon with profound implications for global agriculture. Among the sectors most vulnerable to the adverse impacts of drought is livestock production. This chapter, “Droughts and Livestock Production,” delves into the intricate relationship between these two critical elements, exploring the multifaceted challenges and consequences that drought poses to livestock farming across diverse geographical contexts The chapter will examine how water scarcity, a hallmark of drought, disrupts the delicate balance of feed availability, animal health, and overall productivity within livestock systems. It will further analyze the varied impacts of drought on different livestock species, considering their unique physiological needs and vulnerabilities. Beyond the immediate 

Imagine the lifeblood of a nation’s energy grid thinning to a trickle. This is the stark reality when prolonged droughts grip regions heavily reliant on the oncemighty force of hydroelectric power. While the allure of clean, renewable energy from flowing water has positioned hydropower as a cornerstone of electricity generation globally, its dependence on a consistent and abundant water supply renders it exceptionally vulnerable to the increasingly frequent and intense droughts sweeping the planet. This chapter embarks on a critical exploration of the intricate and often strained relationship between these two forces: the essential need for water in sustaining hydroelectric power and the devastating impact of its absence during drought conditions Moving beyond a simple definition, we will delve into the multifaceted ways in which droughts cripple hydroelectric facilities, from dwindling reservoir levels that starve turbines to the cascading effects on energy security, economic stability, and ecological balance. We will traverse the globe, examining compelling case studies from drought-stricken regions, revealing the tangible consequences for communities and industries. Furthermore, this chapter will unpack the complex interplay of factors that exacerbate

“Sustainable Water Resources Management Strategies” embarks on a comprehensive exploration of the paramount challenges and essential solutions for safeguarding our planet’s most precious resource: water. This recognizes that water is not merely a commodity but the very lifeblood of ecosystems, a cornerstone of human health, a critical input for food production, and an indispensable element for industrial progress and societal well-being. Building upon a fundamental understanding of the intricate hydrological cycle, the distribution of global water resources, and the escalating anthropogenic pressures they face, we now turn our attention to the proactive and forwardthinking approaches that define sustainable water resources management. • In an era marked by increasing environmental consciousness and the stark realities of climate change, the traditional paradigms of water management are proving inadequate. Growing populations, rapid urbanization, and the expansion of industrial activities place unprecedented demands on both the quantity and quality of available water. Furthermore, the erratic and often extreme

The escalating global threat of drought, characterized by increasing frequency and severity, demands a comprehensive and coordinated response. These prolonged periods of water scarcity not only endanger human lives and erode livelihoods but also inflict lasting damage on fragile ecosystems. Recognizing the scale and complexity of this challenge, a multitude of global initiatives have emerged, uniting international organizations, governments, research institutions, and civil society in a collective endeavor. This chapter will delve into the landscape of these crucial efforts, exploring the key organizations driving change, the diverse strategies being implemented, and the pivotal role of technological advancements in mitigating the devastating consequences of drought. By examining the framework of these global collaborations, we aim to provide a comprehensive understanding of the ongoing work to build resilience and ensure a more water-secure future for all.

The intricate relationship between weather, climate, and agriculture dictates food security and the livelihoods of countless communities across the globe. In this context, public awareness of agricultural meteorology – the science of how weather and climate impact agricultural practices and outcomes – is not merely informative; it is transformative. This chapter delves into the critical role of fostering understanding and knowledge of agrometeorological principles among the broader public, with a particular focus on empowering farming communities. By exploring the significance of making weather and climate information accessible, relevant, and actionable, we will examine the strategies, initiatives, and global efforts aimed at building a weather-literate agricultural sector (Fig. 15.1). Ultimately, enhanced public awareness in this domain equips individuals and communities with the tools to make informed decisions, mitigate risks, adapt to changing climatic conditions, and contribute to more resilient and sustainable agricultural systems worldwide.

Drought, a sporadic yet impactful event, presents a significant challenge to agricultural systems and economies globally. A notable observation in this context is the tendency of policymakers to readily claim success for their governance during years of favorable weather, while conversely attributing agricultural failures in drought years primarily to natural causes. This inclination often masks an underlying lack of consistent focus and investment in proactive drought-proofing measures. This international comparison examines the contrasting approaches to drought management between developed and developing nations, highlighting how this lack of focus, coupled with varying capacities and resources, shapes their respective policy responses. Understanding these disparities is crucial for fostering more effective and equitable drought resilience measures worldwide, moving beyond the simplistic attribution of agricultural successes to policy and failures solely to weather

As we draw the threads of “Droughts through the Ages” together, we are left with a profound understanding of the cyclical yet evolving nature of drought. From the earliest whispers of human history to the stark realities of our modern world, the absence of life-sustaining water has cast a long shadow, shaping civilizations, sparking innovation, and at times, triggering societal upheaval. This book has journeyed through millennia, examining the historical accounts, scientific understandings, and societal responses to these arid interludes. Yet, the true value of this historical lens lies not merely in recounting the past, but in illuminating a path towards a more resilient future. • The preceding chapters have underscored several crucial insights. We have witnessed the devastating impacts of prolonged dry spells on ancient empires, the ingenuity displayed in developing early irrigation systems, and the growing scientific understanding of the complex interplay between atmospheric conditions, land surface processes, and human activities in driving