eChapters

20.1 Introduction
The average Indian diet, which is predominantly vegetarian, relies heavily on milk as a source of animal protein. Ancient Indians developed more stable milk products to preserve its nutritional value due to the high ambient temperatures in the Indian subcontinent. Therefore, the ethnic dairy foods, which are frequently referred to as traditional or Indian indigenous milk products, have been developed over the course of centuries by utilising locally available equipment, implements, and manufacturing procedures.
20.2 Definition of Traditional Indian Dairy Products
Traditional Indian dairy products, or indigenous milk products of India, encompass all milk-based items that have evolved over generations using locally sourced ingredients and traditional cooking methods. With advancements in mechanized manufacturing technologies and unit operations, these diverse indigenous milk products are set to establish a robust presence in the industrial landscape. Across India, a variety of milk-based sweets, beloved by people of all ages and genders, hold significant cultural importance, often being integral to celebrations and social gatherings, highlighting their essential use of indigenous dairy ingredients.
20.3 Classification of Traditional Dairy Products
The nomenclature of Indian indigenous milk products varies across different regions due to variations in its components and manufacturing methods. Indigenous milk products can be conveniently categorised into nine main categories to facilitate a deeper understanding of their nature.

21.1 Introduction
Khoa, as well as mawa or khava, is a partially dehydrated whole milk product that is produced by perpetually heating milk in a karahi over a direct fire while stirring and scraping it with a khunti until it reaches a semi-solid consistency. The pan is removed from the fire once the desired consistency is obtained, and the contents are transformed into a solid mass known as khoa pat. “Khoa is produced by rapid drying cow, buffalo, goat, or sheep milk, or a combination thereof, and must contain a minimum of 20% milk fat.The product is produced by heat desiccating milk to 65–69% solids in an open pan. Khoa has been utilised as a foundation for Indian desserts for centuries. Milk traders and halwais prepare it according to the conventional procedure. You typically require five times the amount of milk content.

21.2 Classification
There are three primary varieties: “pindi” for burfi, “dhap” for gulab jamun, pantooa, and other delicacies, and “danedar” for kalakand. Khoa production has been the most straightforward technique of preserving milk produced in rural areas during the flood season. Pindi, dhap, and Danedar are the three primary varieties of khoa that are prepared throughout the country. Khoa is the foundation for a diverse array of Indian delicacies, such as gulab jamun and other dishes.

22.1 Introduction
Chhana is a dairy product that is produced by coagulating milk with acids such as citric or lactic acid at high temperatures, with the whey subsequently drained. Chhana is the term used to describe the curd that is produced as a consequence. It has a distinctive spongy texture, a mildly acidic flavour, and an off-white colour. Chhana is defined as the product that is produced by precipitating bovine or buffalo milk with sour milk, lactic acid, or citric acid, in accordance with FSSAI standards. The milkfat content must not be less than 50.0 percent on dried matter, and it must not contain more than 70.0 percent moisture. This product may also be prepared using milk solids.

Low fat chhana shall conform to the following requirements
1. The moisture content should not exceed 70.0 percent.
2. The milk fat content should not exceed 15.0 percent of the dry mass.
Additionally, it specifies that such low-fat chhana shall be sold exclusively in sealed packages. Chhana is primarily made from cow’s milk and is utilised in the production of a variety of Bengali sweets. The production of chhana in India consumes roughly 4 to 4.5% of the total milk produced. Sandesh, rasogolla, chamcham, rasomalai, pantoa, and chhana murki are among the numerous desserts that are prepared using chhana as a base.

23.1 Introduction
Various products can also be produced by emulsions that contain fat globules. For instance, cream is produced when milk contains concentrated fat. This cream can be further processed to produce butter, ghee, and butteroil. “Milk fat, ghee, butter oil, anhydrous milk fat, and anhydrous butter oil are fatty products that are exclusively derived from milk or products obtained from milk, or both, through processes that result in the almost complete removal of water and milk solids, not fat.” The method of manufacturing (FSSAI standards) has notably influenced the flavour and physical structure of ghee.

23.2 Types of Fat Rich Dairy Products
23.2.1 Cream or Malayi
“Cream is a yellowish component of milk that naturally rises to the surface when milk is allowed to stand. It is rich in fat globules.” Cream is mechanically separated in the dairy industry. The size of the fat globules is diminished as a result of homogenisation of cream, which renders the product less suitable for whipping.
Cream can be defined as
1. That portion of milk, which is rich in milk fat
2. That portion of milk into which has been gathered and which contains large portion of milk fat
3. When milk fat is concentrated into a fraction of the original milk that portion is called cream.

24.1 Introduction
A dairy by-product can be described as a valuable commercial product generated during the production of a primary dairy item. Examples include skim milk, buttermilk, residual ghee, and whey, as depicted in the diagram below. Utilizing these by-products not only enhances plant profitability but also makes essential nutrients accessible to humans while reducing environmental pollution from dairy waste. However, converting these edible substances into non-food items is often unjustifiable, particularly in regions facing milk shortages. Effective management of by-products is crucial for ensuring profitable dairy operations, as every component of milk offers significant nutritional value that should be preserved. Consequently, there is growing global interest among researchers in maximizing the utilization of these by-products. Nonetheless, it’s important to note that while many dairy by-products can technically be processed into useful commodities, feasibility alone does not justify their widespread utilization. If capital and resources are to be assigned to a plan to utilise by-products, their processing must be economically viable. Therefore, it is essential to prioritise the research and development of cost-effective technologies for the improving and utilisation of dairy by-products. A dairy by-product can be described as a commercially valuable product generated during the production of a primary dairy product. Examples include skim milk, buttermilk, ghee residue, and whey, as illustrated in the diagram below. Utilizing these by-products enhances operational efficiency, provides essential nutrients for human consumption, and mitigates environmental pollution from dairy waste. However, converting edible materials into nonfood items may not be justifiable, particularly in regions facing milk shortages. Profitable dairy operations depend significantly on effectively managing by-product disposal. Every component of milk should be processed wisely to preserve its nutritional value. Consequently, there is growing global interest among researchers in optimizing the utilization of these by-products. Nonetheless, while it may be technically feasible to process any dairy byproduct into useful goods, it doesn’t necessarily mean it should be done.

25.1 Introduction
Cream, butter, anhydrous milk fat, ghee and fat preserves, cheese, condensed milk, evaporated milk, skim milk, and whole milk powder are among the dairy products that have been extensively examined.
25.2 Defects in market cream
In the market, there are a variety of creams, including half cream, single cream, coffee cream, cultured cream, whipping cream, heavy whipping cream, aerosol cream, double cream, clotted cream, and high-fat creams (also referred to as plastic cream). The defects related to market cream are detailed in Annexure-I
1. Flavour defects in cream: Any flavor imperfections originally present in whole milk may become more noticeable in separated cream. Volatile compounds that are fat-soluble tend to concentrate in the fat portion, which can amplify these defects, such as an oxidized taste. Common flavor defects associated with cream include feed, cooked, malty, musty, utensil, weed, acid, bitter, and oxidized/rancid flavors. These flavor defects are further described in the section discussing flavor issues in Table butter.
2. Specific defects in cream
• Serum leakage, creaming, reduced overrun in whipping cream: Serum leakage typically results from partial churning (overwhipping), causing an unattractive liquid pool around the whipped cream or sogginess when applied to cakes. Excessive whipping leads to the formation of large fat globule clusters, which can break bubble-enclosing membranes, initiate bubble coalescence, and reduce overrun. This process may lead to an irreversible phase inversion, turning the cream into a greasy water-in-oil emulsion, visible as butter granules. Unfavorable creaming and serum separation can be delayed by lowering fat content (within legal limits), adding stabilizers like carrageenan, emulsifiers, or protein ingredients, or through post-UHT homogenization. Using a mix of kappa and iota carrageenan can help reduce creaming during storage and minimize whipped cream drainage.

26.1 Introduction
Developed nations’ packaging sector has achieved great advancement. The advent of innovative marketing strategies such hyper markets and selfservice outlets has pushed the packaging technologies in these nations to unprecedented heights. The evolution of appliances and packaging tools as well as the introduction of fresh and better packaging materials has happened holistically. In nations like India still in development, packaging is still in its infancy. Packaging any product is the arrangement of the most appropriate containers and components to safeguard, move, label, and identify any good.
26.2 Packaging
Packaging is putting an item into a protective wrapping or container for use or storage. The package serves three purposes: it stores, shields, and merchandising tool. For the safe delivery of the product through the several phases of manufacturing, storage, transportation, distribution, and marketing, it is a necessary link between the manufacturer and ultimate customer. Fresh, sound and easy form of milk delivery depends on protective packaging to minimise losses and withstand the challenges of climate change, transit, handling etc.
1. To contain the product: The package should be big enough and built with suitable elements to stop spoiling and leaks. It should be sturdy enough to withstand handling, shipping, and storage difficulties as well as closely matched with the product.
2. To protect the product: Packaging seeks to protect the product from microbiological activity, heat, light, moisture, oxygen, evaporation, etc., therefore preventing contamination, loss, damage, or degradation.
3. To help in selling the product: Easy dispensing, reclosure, disposal, and possible reuse should be made possible by the packaging form, therefore helping the marketability of the product.

27.1 Introduction
Processed organic food typically consists of solely organic ingredients. If there are any non-organic components, a specified proportion of the food’s plant and animal ingredients must be organic, and any non-organic ingredients must meet specific agricultural standards. Organic foods should not contain artificial additives and are usually processed using fewer synthetic methods and materials, avoiding practices like chemical ripening, food irradiation, and genetic modification. While synthetic pesticides are prohibited, non-synthetic pesticides are permitted. Milk from cows—or any other animal—serves as a useful environmental indicator for measuring pollutants and pesticides because substances consumed by the animal end up in the milk it produces. If contaminants are present in the grass, they will ultimately be found in the milk.

27.2 Beyond these four main factors have led to the increasing interest by farmers and consumers in organic dairy farming
1. Consumer concerns about food safety and animal welfare
2. Overproduction of food (perceived as low in quality)
3. The environmental effects of intensive farming

28.1 Introduction
This Act established the Food Safety and Standards Authority of India (FSSAI) to define science-based criteria for food products and control their production, storage, distribution, sale, and import, thereby guaranteeing the availability of safe and nutritious food for humans by aggregating food-related legislation. From the farm to the refrigerator, the FSSAI protects every step to ensure customers all throughout India get milk and milk products free of contamination. The FSSAI has instituted particular rules acknowledging the importance of milk in the Indian diet and the possible health hazards of adulteration or contamination. These criteria cover everything from the quality of dairy farm cleanliness procedures and calf nutrition to processing, packaging, and milk and product distribution. By establishing and following these guidelines, FSSAI not only safeguards the health of millions of people but also fosters consumer trust so that milk and its derivatives may be included into everyday meals.
28.2 The Food Safety and Standards Act
Confusion among consumers, traders, producers, and investors results from the several food laws and several authorities in charge of establishing and enforcing standards across several food industries. Different laws provide different standards by including thorough clauses on the admissibility and degrees of food additives, pollutants, colours, preservatives, and other relevant criteria. Many times rigid and out of line with scientific progress and modernism, these criteria also reflect The developing food processing sector is hampered by this diversity of legislation and the participation of several bodies, therefore hindering the efficient creation and execution of food standards.

29.1 Introduction
Cleaning is achieved using a cleaning agent designed to remove food, dirt, rust stains, minerals, or other residues. It is crucial to choose the appropriate cleaning agent, as not all are suitable for surfaces that come into contact with food. In a food-processing facility, sanitation involves ensuring that utensils and equipment that come into contact with products are kept clean and sterile. Additionally, clothing, air, packaging materials, and non-contact surfaces like floors, walls, and ceilings must be sanitized to prevent product contamination. Employees’ bodies, especially their hands, can also be sources of contamination, so maintaining high personal hygiene and cleanliness standards is essential. Moisture and heat can lead to microbiological contamination of both products and the environment. Moisture on product-contact surfaces and within products creates a medium where microorganisms can thrive and find nutrients, potentially affecting the safety and quality of milk and dairy products.
29.2 Types of Soil
Cleaning involves removing food residues and other types of soil from surfaces like utensils and equipment used in the dairy and food industries.
• In the dairy-processing sector, the equipment must be cleaned of various types of soil including: liquid milk films, air-dried films, heatprecipitated films, heat-hardened films, milk stone, and other foreign materials.
• Soluble soils will dissolve and be carried away in rinse or wash water. For insoluble soil components, chemical detergents may be needed to either dissolve them or soften them to facilitate easier removal.
• Cleaning or sanitizing the product contact surfaces of dairy equipment involves both washing and sterilizing. It’s important to avoid causing undue wear, erosion, or corrosion to these surfaces, as this can reduce their lifespan

30.1 Introduction
Every food processing facility, especially those that produce several products, generates trash in various forms. The food products are rich in carbs, proteins, lipids, and mineral salts. During the process of flushing and washing various equipment, nutrients are released into the drainage, promoting the growth of both anaerobic and aerobic bacteria. Consequently, the water that is flushed might have a highly unpleasant smell and could become a challenge for disposal in the municipal sewer system.

30.2 Definition of Waste Management
Waste management encompasses the collection, transportation, processing, recycling or disposal, and oversight of waste materials.

30.3 Types of Wastes in a Food Processing Plants
Waste produced in food processing plants can be categorized based on their form and origin, whether they are avoidable or unavoidable, their value, or their potential for reuse.

30.3.1 Based on the forms: Wastes based on forms can be classified as
1. Solid wastes,
2. Liquid wastes,
3. Oily wastes,
4. Gaseous wastes/water vapors.

31.1 Introduction
A fundamental element of quality assurance is good manufacturing practice (GMP), which ensures that goods are consistently produced and regulated according to the quality standards suitable for their intended application and as outlined by the marketing license. The primary objective of GMP is to mitigate risks in pharmaceutical manufacture, which may be categorised into two main types: erroneous labelling and cross-contamination/mix-ups. Primarily, manufacturers must guarantee that their goods are safe, effective, and of adequate quality; hence, risk assessment has become a crucial component of WHO quality assurance guidelines.
31.2 Implementation of HACCP
31.2.1 HACCP Preamble and Definitions Preamble
1. The introductory portion of this publication delineates the concepts of the Hazard Analysis and Critical Control Point (HACCP) system as endorsed by the Codex Alimentarius Commission. This section provides broad recommendations for system application, recognising that implementation specifics may differ according to the food operation’s unique conditions.
2. The HACCP system, grounded in scientific principles and methodical methodology, identifies specific dangers and implements control measures to assure food safety. It functions as an instrument for hazard evaluation and the implementation of control systems aimed at prevention rather than predominantly on final product testing. The HACCP system is flexible, allowing for modifications in equipment design, processing methods, or technology innovations.
3. HACCP is relevant across the whole food chain, from initial production to ultimate consumption, and its use must be guided by scientific knowledge on dangers to human health. In addition to improving food safety, the use of HACCP can provide other substantial advantages. Furthermore, the use of HACCP systems can streamline regulatory inspections and enhance international trade by increasing confidence in food safety.

Environmental contaminants are defined as substances introduced into the environment, either naturally or anthropogenically, that pose potentialharm to living organisms and ecosystems (Masindi and Muedi, 2018).These contaminants include a diverse range of pollutants, such as chemicalagents, biological contaminants and physical pollutants (Ahmed et al.,2021). Understanding these contaminants and their toxicity is of paramountimportance, given their profound implications on human health, biodiversityand the overall functioning of ecosystems (Samuel et al., 2023).Environmental contaminations are pervasive in nature and originated fromdiverse sources. Industrial activities are major contributors, releasing heavymetals, organic solvents, and particulate matter into air, water and soil(Williams, 2019). Similarly, agricultural practices contribute to contaminationthrough excessive use of fertilizers and pesticides, which often runoff intoaquatic systems, causing eutrophication and harming aquatic life (Zahoor and
Mushtaq, 2023). Urbanization and improper waste management have alsointensified the problem with plastics and emerging contaminants finding theirway into ecosystems (Singh et al., 2022). Even natural events like volcaniceruptions and forest fires contribute to environmental contamination, thoughtheir impacts are often localized and episodic compared to the persistent andwidespread pollution caused by human activities (Ernst, 2012).The study of environmental contaminants and their toxic effects is of vitalimportance for several reasons in today’s context of escalating global pollution(Hussain and Reza, 2023). First, it provides insights into the health risks posedto humans and wildlife (Pereira et al., 2015). Many contaminants, such as lead,mercury and polychlorinated biphenyls (PCBs), are known to have chronic andacute toxic effects on biological systems, affecting neurological, reproductivand immune functions (Priyadarshanee et al., 2022). These substances interactwith biological systems in complex ways, often leading to adverse outcomessuch as bioaccumulation, oxidative stress, endocrine disruption and ecologicalimbalances (Satkar et al., 2024). Heavy metals like lead and mercury are
known to accumulate in organisms and disrupt critical biological functions,while synthetic chemicals like bisphenol A (BPA) can interfere with hormonalsystems, resulting in reproductive and developmental issues (Pan et al., 2024).Such impacts underscore the need to understand how these substances interactwith living organisms, identify their exposure thresholds and mechanisms oftoxicity to formulate strategies for risk assessment and mitigation (Kumar andSingh, 2023).

1. Introduction
Bioremediation is a process that utilizes biological agents, such asmicroorganisms, to eliminate pollutants, making it a natural and efficientmethod for environmental cleanup. This approach is considered cost-effectiveas it transforms harmful pollutants into less toxic substances through microbialdegradation or detoxification. Currently, many developing nations areprioritizing industrial growth, urbanization, and the use of agrochemicals inagriculture, which has heightened the importance of bioremediation and drawnsignificant attention to this practice. As a sustainable solution, bioremediationoffers a way to restore healthier ecosystems by removing pollutants from theenvironment (Fig. 1).

1. Introduction
One of the foremost environmental challenges the world faces today is airpollution. As industrialisation, urbanisation, and transportation continueunabated, harmful substance levels in the atmosphere have becomealarmingly high (Thanvisitthpon et al., 2024). This general contamination inthe air is not just a serious risk to humanity but also harms ecosystems whilcontributing to global climate change. Controlling airpollution has becomea critical necessity at this stage, with the need for innovative solutions inthis respect. Bioremediation is one of the innovative solutions, where certainmicroorganisms break down or neutralise pollutants in the air.

1. Introduction
Agro-industrial waste plays a crucial role in bioremediation, the process of usingbiological organisms to remove or neutralize pollutants from contaminatedenvironments (Garg, 2020). With the rise of industrialization and agriculturalactivities, there’s a corresponding increase in waste production. However,these waste materials, often rich in organic compounds, can be repurposedas valuable resources as mentioned in scientific studies (Sahota and Sharma,2020; Yadav et al., 2022).

1. Introduction
1.1. The Growing Problem of Pesticide Pollution
Pesticides are used in very great amounts in agricultural production for theprotection of crops against pests, diseases and weeds. They are also veryinstrumental in boosting agricultural productivity by ensuring food securityand preventing losses that may be caused by outbreaks of pests (Popp et al.,2013). However, the extensive use of pesticides has generally resulted in hugeenvironmental concerns. Improperlymanaged pesticide residues may remainin soil, water and even air for many years and create severe ecological andhealth hazards in the long run (Zhang et al., 2024). This widespread existenceof pesticides in the environment has raised a serious alarm concerning theiradverse impacts on biodiversity, soil fertility and quality of water, furtherbioaccumulation in the food chain that affects wildlife and human populations(Aktar et al., 2009).

1. Introduction
Bioremediation is an environmentally friendly process that uses numerousdifferent microbes (e.g., fungi & bacteria), green plants, or combinations
of them to weaken and detoxify dangerous pollutants in a sequential orsuccessional manner. The pollutant composites are converted by biologicalorganisms through a response that takes place as part of their metabolicprocesses. They convert poisonous pollutants into carbon dioxide (CO2) andwater (H2O), microbial biomass, and other products that are less poisonous.The organic wastes are biologically degraded under controlled, harmless, andsafe condition into inoffensive products below the admissible limits establishedby supervisory authorities.

1. Introduction
Metals pollution in water particularly in wastewater has become a center ofconcern due to social changes such as industrialization and urban development(Blaszczak-Boxe et al., 2023). It is in this context that most of the conventionalwastewater treatment fails to remove the heavy metals in question satisfactorilyand that there is a pressing need for new ideas that would be sustainable. Thischapter aims to discuss algal bioremediation as an environmentally suitableprocess for the decontamination of wastewater containing toxic metals.

1. Introduction
In recent decades, environmental contamination has emerged as a seriousthreat to our modern society. The relentless growth of urbanization andindustrialization leads to the ever-increasing production of hazardouschemicals. Safe disposal of these hazardous materials is crucial, as releasingthem into an already strained environment has severe consequences. Theexponential rise in human activity is directly related to the alarming risein local and global pollution levels, which severely disturbs the balance ofecosystems. Industrial activities, in particular, are a major source of highlyhazardous chemicals such as dyes, pigments, and aromatic compounds,which pose a serious threat to the environment. In India, the textile industry, amajor force driving the country’s economic growth, also ranks asthsecondlargestpolluter. The printing, finishing, and dyeing processes used in textileproduction generate significant waste (Dubey et al., 2018). Dyes, a majorsource of pollution in this industry, are syntheticand complex in structure. Thiscomplexity makes them poorly soluble in water, hindering biodegradation andposing a long-term environmental concern. The global textile industry utilizesa wide range of dyes, with estimates indicating over 100,000 commerciallyavailable options. The worldwide production of these dyes is estimated to be700,000 tons per year (Al-Tohamy et al., 2020). However, dye contaminationis a major challenge in this industry. Studies indicate that during synthesisand dyeing processes, a significant portion, ranging from 10% to 15% of thetotal dyestuffs used ends up released into global water bodies (Leal et al.,2020). A significant portion of textile dyes, ranging from 2% to 20%, aredirectly released into water reservoirs through wastewater effluents. This is