Anaerobic digestion of spent bedding from deep litter piggery housing

Tait, Stephan, Tamis, Jelmer, Edgerton, Bruce and Batstone, Damien J. (2009) Anaerobic digestion of spent bedding from deep litter piggery housing. Bioresource Technology, 100 7: 2210-2218. doi:10.1016/j.biortech.2008.10.032


Author Tait, Stephan
Tamis, Jelmer
Edgerton, Bruce
Batstone, Damien J.
Title Anaerobic digestion of spent bedding from deep litter piggery housing
Journal name Bioresource Technology   Check publisher's open access policy
ISSN 0960-8524
Publication date 2009-04-01
Year available 2008
Sub-type Article (original research)
DOI 10.1016/j.biortech.2008.10.032
Open Access Status Not yet assessed
Volume 100
Issue 7
Start page 2210
End page 2218
Total pages 9
Place of publication Netherlands
Publisher Elsevier BV
Language eng
Subject C1
090703 Environmental Technologies
960912 Urban and Industrial Water Management
Abstract This paper investigates spent litter from deep litter piggery housing as a potential substrate for farm-scale anaerobic digestion. Degradability and degradation rates were evaluated under mesophilic conditions for unused, lightly soiled (used by weaner/small pigs), and heavily soiled (used by finishing/large pigs) wheat straw, barley straw, and rice husks bedding. Apparent first order hydrolysis rate coefficients varied, but were comparable across all samples analysed (<0.1 day). Spent wheat straw was generally more degradable (approximately 60%) than spent barley straw, while spent barley straw was comparable to raw straw (40-50%), but with higher hydrolysis rates, indicating better accessibility. Rice husks were relatively poorly degradable (<20%), but degradability was improved by weathering in a pig shed. Digestion of spent barley and wheat straw litter was significantly faster (approximately twice the rate) at low (8% solids) than high (14% solids) solids loading. Rice husks degradation kinetics were not significantly influenced by solids concentration. Intrinsic methanogenic activity of heavily soiled spent wheat straw and rice husks bedding was initially poor, but achieved full activity after 40-60 days, indicating that reactor operation without external inoculum may be possible with care.
Formatted abstract
This paper investigates spent litter from deep litter piggery housing as a potential substrate for farm-scale anaerobic digestion. Degradability and degradation rates were evaluated under mesophilic conditions for unused, lightly soiled (used by weaner/small pigs), and heavily soiled (used by finishing/large pigs) wheat straw, barley straw, and rice husks bedding. Apparent first order hydrolysis rate coefficients varied, but were comparable across all samples analysed (<0.1 day−1). Spent wheat straw was generally more degradable (approximately 60%) than spent barley straw, while spent barley straw was comparable to raw straw (40–50%), but with higher hydrolysis rates, indicating better accessibility. Rice husks were relatively poorly degradable (<20%), but degradability was improved by weathering in a pig shed. Digestion of spent barley and wheat straw litter was significantly faster (approximately twice the rate) at low (8% solids) than high (14% solids) solids loading. Rice husks degradation kinetics were not significantly influenced by solids concentration. Intrinsic methanogenic activity of heavily soiled spent wheat straw and rice husks bedding was initially poor, but achieved full activity after 40–60 days, indicating that reactor operation without external inoculum may be possible with care.
Keyword Anaerobic digestion
Manure
Agricultural waste
Rice husk
Straw
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
Advanced Water Management Centre Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 33 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 15 Apr 2009, 19:03:18 EST by Suzanne Read on behalf of Advanced Water Management Centre