Comparison of horse mulch to wheat straw as feedstocks for solid-state anaerobic digestion

Zhifang Cui, Jian Shi, Yebo Li

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Wheat straw is one of the most commonly used bedding materials in horse stall. The finished straw bedding materials, or horse mulch, has lower cellulose and hemicellulose contents, whereas higher total volatile fatty acids (total VFA) concentration than wheat straw. Biogas production from solid-state anaerobic digestion (SS-AD) of horse mulch and wheat straw was compared in this study. The SS-AD tests were conducted at 22% total solids (TS) content using effluent from a liquid AD as inoculum at three feedstock-to-inoculum (F/I) ratios of 2.0, 4.0 and 6.0. Daily methane yield of horse mulch peaked earlier than that of wheat straw. The highest methane yield of 150.0 L/kg volatile solids (VS) was obtained from horse mulch at FII ratio of 4.0, which was 56.2% higher than that of wheat straw. The corresponding cellulose and hemicellulose degradations of horse mulch were 24.1% and 49.4% higher than those of wheat straw, respectively.

Original languageEnglish
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2011, ASABE 2011
Pages568-582
Number of pages15
StatePublished - 2011
EventAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2011 - Louisville, KY, United States
Duration: Aug 7 2011Aug 10 2011

Publication series

NameAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2011, ASABE 2011
Volume1

Conference

ConferenceAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2011
Country/TerritoryUnited States
CityLouisville, KY
Period8/7/118/10/11

Keywords

  • Anaerobic digestion
  • Biogas
  • Biomass
  • Horse mulch
  • Solid-state anaerobic digestion
  • Wheat straw

ASJC Scopus subject areas

  • Agronomy and Crop Science

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