Journal
BIORESOURCE TECHNOLOGY
Volume 250, Issue -, Pages 155-162Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.11.037
Keywords
Rice straw; Pig manure; Organic loading rate; Biological pretreatment; Anaerobic co-digestion
Funding
- Science and Technology Support Program of Jiangxi Province, China [20151BBF60029]
- Outstanding Youth Talent Funding Program of Jiangxi Province, China [20171BCB23044]
- National Natural Science Foundation of China [31260024]
- Special Fund for Agro-scientific Research in the Public Interest of China [201203072]
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In this study, rice straw (RS) and pig manure (PM) mixtures with or without bio-pretreatment were used as the substrates and digested in a 9 L of anaerobic reactor at Organic loading rates (OLRs) of 0.4-3.1 kg COD/(m(3) d). The volumetric methane production rate (VMPR), methane yield and anaerobic stability were comparatively investigated. The results showed the co-anaerobic digestion processes of RS and PM mixture after biological pretreatment were very stable at OLRs of 0.4-2.5 kg COD/(m(3) d), and its optimal VMPR and methane yield could reach 0.64 L CH4/(L d) and 0.4557 L CH4/g CODremoved at OLR of 2.5 kg COD/(m(3) d), which were 62.4% and 37.8% higher than those of the control under the same OLR condition. This study indicated the biological pretreatment with a cellulolytic microbial consortium own great potential in improving the methane yield and productivity of RS and PM wastes.
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