eChapters

Abstract

Drying remained at the centre stage since the initiation of the food processing due to its promise to preserve agricultural products economically and add functionality to a food product unlike other thermal as well as non-thermal food processing operations. However, many existing drying techniques have their own limitations like nutrient loss, damage of the organoleptic quality, high cost etc. Therefore, research for better drying technologies is going on. Supercritical drying (SCD) is one such technology which utilizes higher dissolving power of super critical fluids (SCFs) to dry food products. The current chapter illustrates the mechanism of SCD as well as current state-of-art and promise of the drying technology. Also, some modelling approach of SCD has been included in the discussion to facilitate new designs and optimization of SCD for various food products.

Introduction
 
In recent years, there has been a growing interest in the functional foods because they can provide physiological benefits additional to nutritional and energetic, as for instance, antihypertensive, antioxidant or anti-inflammatory [1]. A functional food can be defined as a food that produces a beneficial effect in one or more physiological functions, increases the welfare and/or decreases the risk of suffering a particular disease. Furthermore, new types of products, derived from food, called nutraceuticals have recently been developed. These products, usually employed as food supplements, are marketed as tablets and pills, and can provide important health benefits.

2.1 Introduction

Food is one of the complex systems involving many constituents such as carbohydrates, lipids, proteins, vitamins, minerals and other phytochemicals. These all constituents are not present in the same relative proportion in every type of food and thus the foods are categorized and valued according to the presence of these constituents as protein rich foods, fat rich foods, etc. The specific type of food is in abundance with only one or at most two of these constituents and rest of the bulk is not valuable, commercially. So, if these active constituents which are present in the tissue surrounding inactive matrix, are separated, it is of great benefit with respect to increased purity, nutritive value, functional properties, reduction in volume, easy handling and transportation. On contrary some valuable food items contain undesirable constituents generally referred as anti-nutritional factors. Removal of these anti-nutritional factors enhances the food value and commercial utilization. Hence, the separation of phytochemicals and removal of anti-nutrients from the food matrices can be easily carried out by using a unit operation called as extraction.

Extraction involves the separation or isolation of active/desirable components of complex system viz., plant and animal tissues from the rest of inactive/undesirable components by using suitable means such as solvent or mechanical structure. The basic principle involved in the extraction process is partitioning of different components in accordance with the extracting agent. For example, in mechanical extraction, the partitioning is due to pressure and screen/apperature size where as in case of solvent extraction, the portioning of components from mixture takes place due to particular solubilizing power of solvent used.

Supercritical Fluid Extraction (SFE) is an advanced extraction technology that provides an efficient and comparatively sustainable alternative to conventional solvent-based extraction. This chapter introduces the fundamental principles of supercritical fluids and explains the mechanism by which desirable compounds can be selectively extracted from food materials. It examines the use of SFE for recovering aroma compounds, essential oils, flavours, pigments, colours, antimicrobial compounds and valuable bioactive substances. Particular emphasis is placed on obtaining high-purity extracts while minimizing toxic solvent residues. The chapter also discusses industrial food applications, process advantages and limitations, highlighting the potential of SFE for developing cleaner, efficient and value-oriented food-processing and ingredient-recovery systems.

Abstract

Drying is a very important unit operation in food processing. Being an energy intensive unit operation, drying process demands improvement to make it energy efficient. Beside this operating conditions used in drying affect product quality substantially; however, traditional dryers do not allow enough flexibility to meet quality requirements for several products. This has resulted in development of number of new drying techniques, to cope with both energy efficiency and product quality.

Abstract
Food insecurity and malnutrition are on the rise globally, impacting millions, especially in rural regions where extreme poverty and food insecurity are deeply rooted. Vulnerable groups, including women, youth, and indigenous peoples, are disproportionately affected. Producing foo  that meets dietary needs and ensuring its availability in the future is essential for sustainable development and food sustainability. Addressing the growing global food security concerns and supporting the increasing population requires the continual expansion of plant-based proteins’ significance. Legumes are excellent sources of proteins, carbohydrates, and both soluble and insoluble dietary fibers. Legumes, with their high dietary fiber and low-fat content, help maintain body weight and lower the risk of cardiovascular disease. They are also rich in essential minerals such as potassium, calcium, magnesium, phosphorus, and iron, and provide important vitamins like folate, thiamine (B1), riboflavin (B2), and niacin (B3). Additionally, pulses contain various phytochemicals, including phenolics, flavonoids, phytates, lectins, tannins, saponins, oxalates, enzyme inhibitors, phytosterols, and antimicrobial peptides, which offer numerous potential health benefits. These phytochemicals exhibit anti-inflammatory, anticancer, antimicrobial, and anti-ulcerative properties. Incorporating legumes into agricultural systems can foster more sustainable and climate-resilient farming practices. In developing countries, legumes are often used to supplement cereals or starchy foods to combat protein-energy malnutrition, as animal proteins tend to be expensive in these regions.
Keywords: Antioxidants, Food security, Legume, Malnutrition, Healthy diet

India produces 146 million tons of vegetables (NHB report, 2011) and the total area under vegetable cultivation is around 8.5 million ha. Potato, tomato, onion, cabbage and brinjal account for around 60 per cent of the total vegetable production in terms of quantity. India’s annual fruit production is 75 million tons (NHB report, 2011) and the total area under fruit cultivation is around 6.3 million ha. The major Indian fruits are mango, banana, citrus fruits, apple, guava, papaya, pineapple, and grapes. Fresh fruits and vegetables play a vital role in Indian context and their marketing works as an influencing force in the economy. Though retailing of fresh fruit and vegetables is a low margin business, the market potential is very large in a country like India. This factor has attracted many corporates into this sector. Marketing of agricultural produce is different and more challenging than many industrial products because of the perishability, seasonality, and bulkiness. The very nature of small size of land holdings by the farmers, varied climatic conditions, production spread over wide geographical area, mainly in remote villages, diversified consumption patterns/habits of the Indian consumers and poor Supply Chain (SC) infrastructure makes marketing for fruits and vegetables more complicated. At the same time, Indian consumers demand fresh fruits and vegetables. Thus, Management plays a crucial role in marketing fruits and vegetables. Supply Chain efficiency not only helps in increased production and per capita consumption, but also contributes to economic development of the country. As a result, Supply Chain Management (SCM) throws both challenges and opportunities in marketing of fruits and vegetables. Efficient SCM in marketing, not only increases the profitability and efficiency of retailers, but also adds value to different stakeholders like cultivators (farmers), consolidators and consumers. Traditional Retail Model of fruit and vegetables is predominantly followed in unorganized retail sector. Players involved in this model are commission agents, auctioneers, wholesalers, traditional retailer of all type of formats family run ‘mom and pop’ stores, roadside shops, pavement shops and cart vendors apart from farmers and customers.

Introduction

Different dairy development programmes are working in various parts of the country. But the dairy development programmes which are confined only to the production activities can not give the best results unless they are supported by the marketing facilities and other infrastructure.

Need for Estimation of Milk Production Potential

Estimation about the milk production potential of any region is required for establishing milk processing plant and helps in making the planning and policy for developing marketing infrastructure in that area. In fact the marketed surplus depends on the marketing facility available in the region. If there are marketing facilities in the area like good cooperative societies are operating in the region, and good prices are offered to the milk producers which covers their cost of production and margins, the marketed surplus is bound to be higher than that of the regions where marketing facilities are not existing.

Population growth and rising demand for processed food have increased pressure on food industries to improve safety while reducing energy, water, waste and environmental impacts. Green preservation technologies seek to deliver effective processing through cleaner operations, responsible resource use and reduced dependence on toxic substances. These approaches support sustainable industrial development by lowering processing time, conserving nutrients and improving the utilisation of raw materials. The chapter discusses energy-efficient preservation, water-saving techniques, waste valorisation and the conversion of by-products into useful materials. Life-cycle assessment is introduced as a method for evaluating environmental performance across the preservation system and identifying opportunities to reduce emissions, resource consumption and food-chain waste.

Abstract

Airflow drying persists as the main dehydration operation. Indeed, the high expense of freeze-drying in term of equipment cost and energy consumption considerably restricts its use and confines its applications to high added value products (pharmaceutical products, cosmetics, etc.). However, airflow drying undergoes fundamental problems such as low operation performance, poor product quality and short reliability of the equipment. The time of drying is long; particularly at the end of the operation, which implies crucial energy consumption. The poor quality of the end product is related to thermal degradation and in particular to the compactness of texture as a result of the phenomena of shrinkage and case hardening. Another main problem common to all drying operations, including freeze-drying, is the safety of the end products. Swell-drying is defined as an operation that combines optimized hot air drying with instant controlled pressure controlled texturing. The improvement of texture, the preservation of sensory and nutritional quality, the possibility of manufacturing expanded granule powders and the reduction of drying time and energy consumption allow considering swell-drying as the most relevant drying process.

SWOT Analysis

SWOT analysis is a strategic planning tool used by organizations to identify and evaluate their internal strengths, weaknesses, and external opportunities and threats. It is divided into four key components

Strengths (internal capabilities that provide an advantage)

Weaknesses (internal limitations that may hinder performance)

Opportunities (external factors that could be leveraged for growth or improvement)

Threats (external challenges that could negatively impact the organization)

By assessing these areas, a company can better understand its competitive position, make informed decisions, and develop strategies to capitalize on opportunities while addressing weaknesses and mitigating potential risks. SWOT analysis is widely used in business, marketing, and project management for strategic planning and decision-making.

Introduction

Though India is a highest producer of milk in the world, only 15 to 20 per cent of the milk is marketed through organized sector comprised of cooperative societies, public and private processing plants. Bulk marketing is limited to processing plants and cooperative societies. In contrast to Indian situation, most of the milk in developed world is consumed in different processed forms. It is something very general to India where overall food markets for processed foods are generally low and same is the case with milk. By all estimates about 75 per cent of the milk purchased by the consumer as liquid milk whether raw or processed. The share of pasteurized milk is only 10 per cent but the demand is increasing at the rate of 15 percent per annum. One fourth of the milk production is processed in the unorganized sector transforming into products like, sweets. Khoa, paneer, curd, lassi, etc. There are small scale milk product manufacturing units which fall in the category of semi-organized sector comprised of creameries, ice-cream units which are manufacturing the similar products as produced by the composite milk plants in the organized sector. They generally serve the local markets but have the important share in processing of milk as well as meeting the consumers specific demands. The organized sector comprised of mainly dairy plants, procures surplus milk through Milk Producers Cooperative Societies and generally follows the HACCP standards leading to quality of the products, whereas unorganized sector is composed of milk vendors, contractors, halwaies and creameries, collect milk from producers and sell either as raw milk or manufactured milk products or both.

Introduction

India has cemented its position as the global leader in milk production for 2023-24, contributing a staggering 230.58 million tonnes, or 25% of the world’s total supply. This achievement reflects an annual growth rate of 4%, driven by a vast network of small-scale farmers who manage one or two milch animals each. Despite their limited productivity, these farmers collectively power the nation’s dairy industry. Before the transformative Operation Flood, the sector was fragmented, dominated by middlemen, and poorly linked to urban demand. The initiative revolutionized the industry, introducing cooperative, private, and state driven organizations that established a seamless system for milk procurement, processing, and marketing. Today, thousands of dairy factories across the country transform raw milk into value-added products to meet India’s immense demand, with rural households allocating 15.51% of their food budget to dairy and urban households spending an even higher 18.19%. Coordinating milk collection from millions of scattered producers and delivering it to processing facilities is a monumental task, yet this streamlined system ensures that India’s dairy sector continues to thrive and satisfy its growing consumer base. India’s dairy export performance in 2023-24 was nothing short of “legendairy,” shipping 63,738.47 metric tonnes of dairy delights worth $272.64 million to fans in the UAE, Saudi Arabia, USA, Singapore, and Bhutan. Butter, ghee, and dairy spreads took the spotlight with $43.65 million in exports (8,106.54 MT) to destinations like Saudi Arabia, Bahrain, and Qatar, spreading Indian flavor worldwide. Cheese exports were equally impressive, with 9,262.63 MT worth $46.84 million making their way to the UAE, USA, and Bhutan clearly, everyone loves a slice of India.

Table cream: It is also called coffee cream, single cream or homogenized cream. It is used in coffee and tests about 20% butter fat.

Table oil expeller: It is a type of the machine that is used for extraction of the oil from the oil seeds (Plate 588).

Table ready meat: Cooked and smoked sausages are called table ready meat.

Tal prolong: This wax is esters of fatty acid glycosides NaCMC.

TAME: It stands for p-Toluene sulfonyl L- arginine methyl ester. It is used in isolation of Trypsin inhibitor.

Introduction

The demand for butter as table spread has declined due to high cost, poor spreadability at low temperature, high saturated fat and cholesterol content, changing life style and increased demand for healthy products. Today food industry is actively involved in new product development, this includes new formulations and imitation of foods being designed to compete with or replace existing products based on their superiority in convenience, cost and quality. The wide acceptance of bread in regular diet among urban consumers (75 percent of all household) reflects around 8 percent rate of growth in bread consumption. With this increase, the requirement of a suitable spread to complement has also increased. Table spreads include a variety of spreadable semi-solid products such as fat spreads, cheese spread, peanut butter etc. Butter has also been blended with vegetable oils/fat to produce a product that retains dairy qualities of butter with enhanced spreadability.

Tabletting is the area where sugar confectionery and pharmaceutical manufacture come closest, as the machines are similar the process can also be similar. Confectioners normally try to make tablets as hard as possible whereas pharmaceutical tablets are normally made to be fairly soft.

Tablets are made by compressing a powder in a die. Under pressure the powder fuses and is ejected as a tablet. The problem of tabletting is to produce a powder that will flow freely when poured into the die but bonds satisfactorily when compressed. Some materials are available in a directly compressible form. One example is sorbitol, which goes some way to explain the popularity of pressed sorbitol tablets with manufacturers. If directly compressible materials are not being used then the material must be granulated before being tabletted.

Granulation

Tabletting materials can be prepared by a number of different methods as outlined below:

Tamarind (Tamarindus indicus L.) belongs to the family Fabaceae. Genus Tamarindus is a monotypic taxon having only one species. Tamarind is native to tropical Africa, probably Sudan, where it grows wild and is cultivated throughout South-East Asia and America. It is also found growing in Camaroon, Nigeria and Tanzania. Tamarind has a long gestation period of 10-20 years and long-life span of even 100 years.

Cultivars/Varieties: In some regions the type with reddish flesh is distinguished from the ordinary brown-fleshed type and regarded as superior in quality. There are types of tamarinds that are sweeter. One in Thailand is known as ‘Makham waan’. Another one is known as ‘Manila Sweet’. No other improved or named varieties are available.

Uses

Tamarind pulp is an important condiment as a sour ingredient in the Indian cuisine. Pulp has an excellent keeping quality. Timber is used for making agricultural implements. The wood yields excellent charcoal and is used for making gunpowder. Starch is obtained from seeds and is used in the textile industry. Seeds can be fed to animal after roasting and removing the outer skin. Seed is also a good source of tanning. Oil is obtained from seeds and is used in paints and varnishes. Leaves and flowers are also edible. It is rich in medicinal properties. Fruits is considered as digestive, carminative and laxative. With the addition of water and sugar, tamarind yields a cool drink which is quite popular in Latin America.Today India is the largest producer of tamarind in the world.

Tropical fruit tree are important crops which supplement and improve the quality of diet. Many of the species have multi-purpose uses in that they produce non food products such as fuel, timber, fodder, medicines and industrial products for small holders. Harvesting from these trees enable rural people to provide nutrition for a balanced diet and generate income thus alleviate poverty. Tamarind (Tamarindus indica L) can be found throughout much of the tropics, it is grown unattended in backyards, roadsides or waste lands. Tamarind is ideally suited for avenue plantings as a roadsides tree, in and around villages as a multipurpose species for agro-forestry system or as protective firebreaks for forest margins. It is a valuable timber species widely used for making furniture, tool handles, charcoal, oil mills, rice pounders and fuel wood. The leaves are an important source of food and herbal medicine and the edible pulp of ripe fruits is used as a flavouring agent in cooking, soups, jams, chutneys, sauces, pickles etc. The fruit pulp of tamarind forms the “Tamarind of Commerce”. The name tamarind is derived from the Arabic word ‘Tamar-u’l-Hind’ because the dark brown pulp of the fruit was thought to resemble dried dates. It was therefore called the Tamere-hindi or ‘date of India. The production of Tamarind in India was estimated 201000 tonees for year 2017-18 (Horticulture statistics, 2018), India is the world’s largest producer of tamarind products. It is particularly abundant in the India states of Madhya Pradesh, Bihar, Andhra Pradesh, Karnataka, Tamil Nadu and West Bengal. The production in India is mainly concentrated in the drier southern states and the produce is collected by the villagers and sold in the market. In India, the average production of tamarind pods per tree is 175 kg and processed pulp is 70 kg/tree (Kulkarni et al., 1993).

Introduction

From earlier chapters, it is evident that Lactobacilli and Bifidobacteria are the two important genera that have potent applications in food microbiology and human nutrition due to their role in food and feed production, preservation and also due to probiotic potentialities. Most of the bacterial species are still unknown indicating that the identification and classification of bacteria is a hard task since the beginning of microbiology and consequently our knowledge about bacterial ecology is very low. Mean while the expectations about novel bacterial products are high. Therefore, bacterial identification has become a growing field of interest in microbiology. Since, Lactobacilli and Bifidobacteria genera include a large number of species and strains exhibiting important properties in an applied context, chiefly in the area of probiotics as food and therapeutics, an updated list of species belonging to these two genera, their phylogenetic relationships and other relevant taxonomic information are of great significance. The classification and identification of a probiotic isolate at strain level point out its typical habitat and origin. Moreover, the species, or genus name, may also indicates the strain’s safety and technical applicability for its use in probiotic products. Taxonomy helps to place a newly identified organism in a relevant group and enables the scientific communication. Further it facilitates the construction of databases that can be used for rapid identification of organisms at laboratory level easily. Thus, taxonomy of Lactobacilli and Bifidobacteria helps to study these organisms scientifically and allows characterizing and arranging them in an orderly manner which promote the scientific community to explore the benefits from those organisms for the betterment of mankind.

1. Technical Feasibility of Dairy Unit

This includes following information such as
 
    1.    Availability of good quality animals in nearby dairy market,
 
    2.    Availability of good grazing grounds and lands,
 
    3.    Availability of green/dry fodder,
 
    4.    Availability of concentrate feed, medicines etc.
 
    5.    Further availability of veterinary aid, dairy breeding (AI) centre, milk collection and marketing centre are also important.

    6.    Nearness of the selected area to veterinary/breeding/milk collection centre and the financing bank’s branch.

    7.    Capability of the owner and employees such as technical knowledge and skill.