Anaerobic digestion of wheat straw - Performance of continuous solid-state digestion

Marcel Pohl, Kathrin Heeg, Jan Mumme

Research output: Contribution to journalArticlepeer-review

Abstract

In this study the upflow anaerobic solid-state (UASS) reactor was operated at various conditions to optimize the process parameters for anaerobically digesting wheat straw in a continuous process. Additionally, particle size effects have been studied in the operation at 55 and 60°C. Moreover, the incremental effect of the organic loading rate (OLR) to the system was examined from 2.5 to 8gVSL-1d-1.It was found that the UASS operating at 60°C with a small OLR yields highest methane production, but the advantage over thermophilic operation is negligible. The rise in OLR reduces the systems yields, as expected. From OLR=8gVSL-1d-1 a second stage is necessary to circumvent volatile fatty acids accumulation.

Original languageEnglish
Pages (from-to)408-415
Number of pages8
JournalBioresource technology
Volume146
DOIs
Publication statusPublished - 1 Oct 2013

Keywords

  • Anaerobic digestion
  • Methane
  • Organic loading rate
  • Solid-state
  • Wheat straw

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