Agricultural residues are rich in bioactive compounds. These residues can be used as an alternate source for the production of different products like biogas, biofuel, mushroom, and tempeh as the raw material in various researches and industries. The use of agro-industrial wastes as raw materials can help to reduce the production cost and also reduce the pollution load from the environment. Agro-industrial wastes are used for manufacturing of biofuels, enzymes, vitamins, antioxidants, animal feed, antibiotics, and other chemicals through solid state fermentation (SSF). A variety of microorganisms are used for the production of these valuable products through SSF processes. Therefore, SSF and their effect on the formation of value-added products are reviewed and discussed.

Cereal Chem. 94(3):437-442Solid-state fermentation (SSF) represents a technological alternative feature for a great variety of legumes and cereals to improve their functional and nutritional properties. Iron and zinc deficiencies are major health concerns as a public health problem. Therefore, the present investigation was carried out to assess the consequences of SSF on functional properties and in vitro bioavailability of minerals through Caco-2 cells. Fungal strain Aspergillus oryzae (generally recognized as safe) was used for SSF. The effect of SSF on the functional properties (bulk density, water-and oil-binding capacities, emulsion activity and stability, and foaming capacity and stability) of a black-eyed pea flour sample was evaluated. SSF significantly (P < 0.05) decreased the bulk density of black-eyed pea flour; however, significant (P < 0.05) improvement was observed in other functional properties. An unfermented flour sample showed significantly (P < 0.05) decreased iron and zinc bioavailability and digestibility compared with that of the SSF flour sample. SSF significantly increased iron and zinc transport and retention through Caco-2 cells. Significantly increased ferritin content was also observed in the fermented flour sample compared with that of unfermented flour samples. † Corresponding

A large number of by-products or wastes are produced worldwide through various food industries. These wastes cause a serious disposable problem with the environment. So, now a day’s different approaches are used for alternative use of these wastes because these by-products are an excellent source of various bioactive components such as polyphenols, flavonoids, caffeine, carotenoids, creatine, and polysaccharides etc. which are beneficial for human health. Furthermore, the composition of these wastes depends on the source or type of waste. Approximately half of the waste is lignocellulosic in nature produced from food processing industries. The dissimilar types of waste produced by food industries can be fortified by various processes. Fermentation is one of the oldest approaches and there are three types of fermentation processes that are carried out such as solid state, submerged and liquid fermentation used for product transformation into value added products through microorganisms. Selections of the fermentation process are product specific. Moreover, various studies were performed to obtain or fortified different bioactive compounds that are present in food industries by-products or wastes. Therefore, the current review article discussed various sources, composition and nutritive value (especially bioactive compounds) of these wastes and their management or augmentation of value-added products through fermentation.

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