Solid-state anaerobic digestion of spent wheat straw from horse stall

Zhifang Cui, Jian Shi, Yebo Li

Research output: Contribution to journalArticlepeer-review

103 Scopus citations

Abstract

The spent wheat straw from horse stall bedding has lower cellulose and hemicellulose contents, but higher volatile fatty acid content than raw wheat straw. Biogas production from solid-state anaerobic digestion (SS-AD) of spent wheat straw and raw wheat straw was compared in this study. The SS-AD tests were conducted at 22% total solids (TS) content using inoculum from a liquid AD system at three feedstock-to-inoculum (F/. I) ratios of 2.0, 4.0, and 6.0. Daily methane yields of spent wheat straw peaked 8 and 3. days earlier than those of raw wheat straw at F/. I ratios of 2.0 and 4.0, respectively. The highest methane yield of 150.0. L/kg volatile solids (VS) was obtained from spent wheat straw at an F/. I ratio of 4.0, which was 56.2% higher than that of raw wheat straw. The corresponding cellulose and hemicellulose degradation of spent wheat straw was 24.1% and 49.4% higher than those of raw wheat straw, respectively.

Original languageEnglish
Pages (from-to)9432-9437
Number of pages6
JournalBioresource Technology
Volume102
Issue number20
DOIs
StatePublished - Oct 2011

Bibliographical note

Funding Information:
This project is supported by funding from Belcan Corporation . The authors would like to thank Mrs. Mary Wicks (Department of Food, Agricultural and Biological Engineering, OSU) for reading through the manuscript and providing useful suggestions.

Keywords

  • Biogas
  • Biomass
  • Solid-state anaerobic digestion
  • Spent wheat straw
  • Wheat straw

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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