Hydrogen production from liquid swine manure by dark fermentation

Yecong Li, Jun Zhu, Curtis Miller, Xiao Wu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A full factorial experimental design was employed in this experiments for learning the effects ofpH and hydraulic retention time (HRT) on hydrogen production in dark fermentation by a mixed culture of fermentative bacteria using a laboratory-scale anaerobic sequencing batch reactor (ASBR). Five pH values ranging from pH 4.7 to 5.9 at an increment of 0.3 and four HRTs ranging from 12 to 24 hours at an increment of 4 hours were tested. The results showed that at37±1°C, both pH and HRT had a strong influence on the reactor performance including gas volume, gas composition, reactor stabilization, microbial growth, and volatile fatty acids (VFAs) and alcohol distribution. The optimal condition for hydrogen production was found at HRT 16h and pH 5.0, under which the biogas comprised 35.8 ±1.6% of hydrogen with a production rate of 9.8 ± 2.2L-H2/day, a specific yield of 0.83 L-H2/ (g biomass), and a yield of 1.63 ± 0.06 L-H2/L liquid swine manure, which demonstrated a significant and encouraging product to substrate ratio of 1.63. The highest butyrate to acetate ratio, the lowest propionate concentration, as well as a satisfying stabilization and biomass concentration were all observed at the optimal condition in the anaerobic sequencing batch reactor system.

Original languageEnglish (US)
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2008, ASABE 2008
PublisherAmerican Society of Agricultural and Biological Engineers
Pages1491-1503
Number of pages13
ISBN (Print)9781605605364
StatePublished - Jan 1 2008
EventAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2008 - Providence, RI, United States
Duration: Jun 29 2008Jul 2 2008

Publication series

NameAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2008, ASABE 2008
Volume3

Other

OtherAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2008
CountryUnited States
CityProvidence, RI
Period6/29/087/2/08

Keywords

  • Hydraulic retention time influence
  • Hydrogen production
  • Liquid swine manure
  • PH effect

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