Co-production of lactic acid and chitin using a pelletized filamentous fungus Rhizopus oryzae cultured on cull potatoes and glucose

Journal of Applied Microbiology
Yan LiuShulin Chen

Abstract

This paper developed a novel process for lactic acid and chitin co-production of the pelletized Rhzious oryzae NRRL 395 fermentation using underutilized cull potatoes and glucose as nutrient source. Whole potato hydrolysate medium was first used to produce the highest pelletized biomass yield accompanying the highest chitin content in biomass. An enhanced lactic acid production then followed up using batch, repeated batch and fed batch culture with glucose as carbon source and mixture of ammonia and sodium hydroxide as neutralizer. The lactic acid productivity peaked at 2.8 and 3 g l(-1 )h(-1) in repeated batch culture and batch culture, respectively. The fed batch culture had the highest lactate concentration of 140 g l(-1). Separation of the biomass cultivation and the lactic acid production is able to not only improve lactic acid production, but also enhance the chitin content. Cull potato hydrolysate used as a nutrient source for biomass cultivation can significantly increase both biomass yield and chitin content. The three-step process using pelletized R. oryzae fermentation innovatively integrates utilization of agricultural residues into the process of co-producing lactic acid and chitin, so as to improve the efficiency,...Continue Reading

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Citations

Jun 18, 2010·Journal of Industrial Microbiology & Biotechnology·Yang GuoXinlei Wang
Sep 9, 2010·Journal of Industrial Microbiology & Biotechnology·Xuefeng WuShuizhong Luo
Apr 28, 2012·Applied Biochemistry and Biotechnology·Wenguang ZhouRoger Ruan
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Sep 4, 2012·Journal of Bioscience and Bioengineering·Tsuneo Yamane, Ryohsuke Tanaka
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Oct 23, 2009·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Wanying YaoCurtis Miller
Aug 12, 2015·Critical Reviews in Biotechnology·Veeresh Juturu, Jin Chuan Wu
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Apr 19, 2019·Bioprocess and Biosystems Engineering·Jone Ibarruri, Igor Hernández
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Mar 28, 2021·Bioresource Technology·Lijian LengHuajun Huang

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