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Process stability and microbial community structure in anaerobic hydrogen-producing microflora from food waste containing kimchi.

Abstract：

:Hydrogen production by the dark fermentation of food wastes is an economic and environmentally friendly technology to produce the clean energy source as well as to treat the problematic wastes. However, the long-term operations of the continuous anaerobic reactor for fermentative hydrogen production were frequently unstable. In this study, the structure of microbial community within the anaerobic reactor during unstable hydrogen production was examined by denaturing gradient gel electrophoresis (DGGE) and terminal restriction fragment length polymorphism (T-RFLP) techniques. The changes in microbial community from H(2)-producing Clostridium spp. to lactic acid-producing Lactobacillus spp. were well coincident with the unexpected process failures and the changes of metabolites concentrations in the effluent of the anaerobic reactor. As the rate of hydrogen production decreased, effluent lactic acid concentration increased. Low rate of hydrogen production and changes in microbial community were related to the 'kimchi' content and storage temperature of food waste feed solution. After low temperature control of the storage tank of the feed solution, any significant change in microbial community within the anaerobic reactor did not occur and the hydrogen production was very stably maintained for a long time.

journal_name

J Biotechnol

journal_title

Journal of biotechnology

authors

Jo JH,Jeon CO,Lee DS,Park JM

doi

10.1016/j.jbiotec.2007.07.492

subject

Has Abstract

pub_date

2007-09-15 00:00:00

pages

300-8

issue

3

eissn

0168-1656

issn

1873-4863

pii

S0168-1656(07)00955-8

journal_volume

131

pub_type

杂志文章

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