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Bioconversion of the Nutrients in Dairy Manure for L-lactic acid Production by Rhizopus Oryzae

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010  1008594.(doi:10.13031/2013.29665)
Authors:   Wanying Yao, Jun Yao, Xiao Wu, Curt Miller, Bo Sun
Keywords:   L-lactic acid, nitrogen source, dairy manure, economic medium

Six levels of crude protein (0.21 to 3.36 g/L) were investigated as the nitrogen source for production of L-lactic acid by Rhizopus oryzae with respect to the influence on L-lactic acid yield, biomass and mycelia morphology. Increases in crude protein from 0.21 to 1.68 g/L led to an increase in L-lactic acid concentration from 6.48 to 57.7 g/L. However, further increases beyond 1.68 g/L did not present continuing increases in L-lactic acid yields.

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