PRODUCTION OF MICROBIOLOGICAL PROTEIN FEED FROM SWEET POTATO (Ipomoea batatas L. Lam) RESIDUE BY CO-CULTIVATION SACCHAROMYCES CEREVISIAE AND CANDIDA UTILIS

• DOI: 10.36899/japs.2023.3.0652
• Publication Date: 2023-02-15T16:19:04Z
• Authors: Y.L. Jin; F Ding; W.L. Shen; Y Fang; Z.L. Yi; L Yang; H Zhao
• Keywords: Ipomoea; Residue (chemistry)

Sweet potato residue (SPR), a byproduct generated during starch extraction from sweet potato, is usually treated as an agrowaste, resulting in lower economic benefits and serious environmental pollution.To promote resource recycling, SPR was used starting material to prepare microbiological protein feed (MPF) by co-cultivating Saccharomyces cerevisiae Candida utilis.The cultivation conditions were investigated, the optimum determined follows: inoculation amount of S. cerevisiae, 5%; C. utilis, water content SPR, 75%; urea, 1%; cellulase, 0.5%; isoamylase, 0.5%, at culture temperature 32°C.Under these conditions, true fermented enhanced 18.08%, which 6.34 times that original SPR.Amino acid composition essential amino index (EAAI) indicated high nutritive value MPF cattle, rabbits, lambs.This simple method provides strategy for recycling reusing agricultural residues economical environment-friendly manner.