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

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 (5 L) 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 degrees 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. (C) 2013 Elsevier Ltd. All rights reserved.

Keywords

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

Published in

Bioresource Technology
2013, volume: 149, pages: 232-237
Publisher: ELSEVIER SCI LTD

SLU Authors

• Risberg, Kajsa

  • Department of Molecular Sciences, Swedish University of Agricultural Sciences
    

• Sun, Li

  • Department of Molecular Sciences, Swedish University of Agricultural Sciences
    

• Leven, Lotta

  • Swedish Institute of Agricultural and Environmental Engineering (JTI)

• Schnürer, Anna

  • Department of Molecular Sciences, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Agricultural Science
Bioenergy
Microbiology

Publication identifier

• DOI: https://doi.org/10.1016/j.biortech.2013.09.054

Permanent link to this page (URI)

https://res.slu.se/id/publ/51535