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Vinegar production residue as substrates for phytase production by Aspergillus ficuum

State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, The Chinese Academy of Agriculture Sciences

^* To whom correspondence should be addressed. E-mail: tjm606caas{at}yahoo.com.cn.

	Abstract

Two kinds of vinegar production residues, sorghum vinegar residue (SVR) and corn vinegar residue (CVR), were used as a substrate for phytase production in solid-state fermentation (SSF) by Aspergillus ficuum. Various process parameters influencing phytase production were evaluated by single factor design experiments; further study involved CVR and its goodness-of-fit levels. An incubation time of 48 hours, initial moisture of 55% and an inoculum of 1.2 x 10⁷ spores per millilitre were the optimum cultural conditions for the production of phytase in waste corn vinegar residue, without adding in vitro nutrient elements by orthogonal design experiment. Results showed that vinegar production residue as substrates for phytase production by Aspergillus ficuum through microbiology fermentation could be applied to treatment of an integrated system for waste from vinegar processing.

First published on September 11, 2009
Waste Management & Research 2009, doi:10.1177/0734242X09335696


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