Effect of unionized volatile acid on acidogenic performance in anaerobic solid-state organic waste degradation

J. Gan, W. Z. Jiang, Y. Kitamura, B. Li, A. Zhen

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

Abstract

Acidogenesis affect on not only methanogenic but also acidogenic and hydrolysis phases in the overall anaerobic process of solid-state organic waste. A batch experiment was conducted to evaluate the influence of unionized volatile acid (UVA) on acidogenesis and hydrolysis of high-solids organic waste. The temperature regime was mesophilic with a 20 day solid retention time. The reactor set-up was a rotational drum fermentation system (RDFS) consisting of 4 fermentors and using soybean meal as a substrate. Results showed that UVA inhibited strongly on the VA increasing ratios, spectra, VS degradation ratios, and the surface based hydrolysis constant with increasing initially added UVA concentration (0, 10, 20, 30 g/L). Results suggested that VA, particularly UVA, strongly inhibited hydrolysis and acidogenesis during anaerobic solid-state substrate degradation.

Original languageEnglish (US)
Title of host publicationLivestock Environment VII - Proceedings of the Seventh International Symposium
EditorsM.J. Briggs, M.E. McCormick
Pages465-471
Number of pages7
StatePublished - Dec 1 2005
EventLivestock Environment VII - 7th International Symposium - Baltimore, MD, United States
Duration: Oct 20 2004Oct 22 2004

Publication series

NameLivestock Environment VII - Proceedings of the Seventh International Symposium

Other

OtherLivestock Environment VII - 7th International Symposium
CountryUnited States
CityBaltimore, MD
Period10/20/0410/22/04

Keywords

  • Inhibition of unionized volatile acid
  • Particle size distribution
  • Surface based hydrolysis constant
  • VA spectrum
  • Volatile solid degradation ratio

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