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Bioresour Technol. 2013 Dec;149:232-7. doi: 10.1016/j.biortech.2013.09.054. Epub 2013 Sep 19.

Biogas production from wheat straw and manure--impact of pretreatment and process operating parameters.

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  • 1Department of Microbiology, Swedish University of Agricultural Science, Uppsala BioCenter, P.O. Box 7025, SE-750 07 Uppsala, Sweden.

Abstract

Non-treated or steam-exploded straw in co-digestion with cattle manure was evaluated as a substrate for biogas production compared with manure as the sole substrate. All digestions were performed in laboratory-scale CSTR reactors (5L) operating with an organic loading late of approximately 2.8 g VS/L/day, independent of substrate mixture. The hydraulic retention was 25 days and an operating temperature of 37, 44 or 52°C. The co-digestion with steam exploded straw and manure was evaluated with two different mixtures, with different proportion. The results showed stable performance but low methane yields (0.13-0.21 N L CH4/kg VS) for both manure alone and in co-digestion with the straw. Straw appeared to give similar yield as manure and steam-explosion treatment of the straw did not increase gas yields. Furthermore, there were only slight differences at the different operating temperatures.

Copyright © 2013 Elsevier Ltd. All rights reserved.

KEYWORDS:

Biogas; C/N ratio; Cattle manure; Steam explosion; Wheat straw

PMID:
24121239
[PubMed - indexed for MEDLINE]
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