ABSTRACT
From the production to the consumption of fruits, vegetables, and cereals, agro-industrial waste is generated in large quantities. These wastes are often disposed of improperly, seriously affecting the environment. The utilization of these wastes is a promising approach to their possible uses. The utilization of these wastes allows the production of various high-value-added products. Through agro-industrial waste, the production of unicellular protein is possible. Single-cell protein is one of the food alternatives in the face of current food safety concerns. They are defined as dried cells obtained from microorganisms. Due to factors such as environmental pollution and population growth, it is essential to search for new food sources sustainably. Lately, the interest in the production of unicellular protein has leaned towards 68the use of alternative technologies. The use of agro-industrial residues and alternative technologies allows for the promotion of product development, economizing, balancing, and benefiting environmental concerns. This chapter has focused on the use of agro-industrial residues from fruits, vegetables, and cereals to obtain different high-value-added products. It summarizes the quantity of some of the residues that are generated in greater quantity annually in the world. In addition, it reviews the different methodologies for obtaining various products with different applications. Highlighting its use for the production of microbial biomass and unicellular protein. It addresses the use of different microorganisms using fermentation technology. Challenges in single-cell protein production are also discussed. This chapter is considerable for the concept of biotechnology, where there is interest in converting agro-industrial wastes into new food sources and producing high-value-added products.
