| Abstract [eng] |
Globally and in Lithuania, the entire production and supply chain generates huge amounts of waste and by-products of the agricultural and food industry, which contain valuable components, such as proteins, and usually they are used irrationally, discarded or used for compost. These by products are generated in large quantities and pose a serious environmental problem. The paper reviews the selection and application of biotechnological solutions for the valorization of plant-based food processing by-products (corn steep liquor, plant drink production by-products) into value-added products, such as protein hydrolysates and antimicrobial bioproducts. In this way, the amount of raw materials is increased and sustainable production is promoted. Enzymatic hydrolysis with proteases and pre-treatment of raw material with low (37 kHz) and high (850 kHz) ultrasound were selected for the efficient production of protein hydrolysates from food processing by-products which are rich in proteins. The production of antimicrobial bioproducts from substrates of different origins (wastes from plant drink production) using LAB fermentation was determined. Fermented permeates inhibited the growth of Fusarium spp. and improved the growth of winter wheat (Triticum aestivum) damaged by Fusarium spp. microscopic fungi. In order to accelerate the production and selection of novel biostimulants, it is necessary to expand the scientific knowledge about the effects of biostimulant application on plant physiology. Testing the potential biostimulatory activity of obtained products, such as protein hydrolysates, under laboratory conditions includes complex analysis, such as seed germination study, changes in microbiological contamination, and the improvement of resistance of plants to cold stress due to protein-based biostimulant application. |
