title: Bioconversion of acid- and gamma-ray-treated sweet potato residue to microbial protein by mixed cultures.
abstract: Sweet potato residue, a starchy agricultural waste, was used as a substrate to produce microbial protein by Fusarium moniliforme and Saccharomyces cerevisiae in submerged fermentation. Acid- and gamma-irradiation-pretreated sweet potato residue enhanced the biomass yield and protein production when the residue was fermented with F. moniliforme and S. cerevisiae. A mixed culture of F. moniliforme and S. cerevisiae efficiently and rapidly utilized free sugars; the maximal biomass yield (13.96 g/l) and protein production (65.8%) were obtained after 3 days fermentation. Lower carbon utilization by the two microbial strains occurred in the waste-containing media as compared to control, increasing the economic value of the waste usage.
authors.affiliation: Microbiology Department, National Center for Radiation Research and Technology, Nasr City, Cairo, Egypt.
authors.forename: N H
authors.initials: NH
authors.lastname: Aziz
authors.forename: G I
authors.initials: GI
authors.lastname: Mohsen
mesh_terms: D000143:Acids; D001711:Biotransformation; D004044:Dietary Proteins / Q000378:metabolism*; D005285:Fermentation; D005656:Fungal Proteins / Q000378:metabolism*; D005670:Fusarium / Q000378:metabolism*; D005720:Gamma Rays; D027723:Ipomoea batatas / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000378:metabolism*
chemical_list: D000143:Acids; D004044:Dietary Proteins; D005656:Fungal Proteins; C012551:single cell proteins