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Variation of the microbial community in thermophilic anaerobic digestion of pig manure mixed with different ratios of rice straw

Paper ID Volume ID Publish Year Pages File Format Full-Text
19964 43150 2016 7 PDF Available
Title
Variation of the microbial community in thermophilic anaerobic digestion of pig manure mixed with different ratios of rice straw
Abstract

The effect of pig manure mixed with rice straw on methane yield and the microbial community involved in a thermophilic (55°C) anaerobic digestion process was investigated. Three substrates composed of mixed pig manure and rice straw at different ratios (95:5; 78:22 and 65:35 w/w, which resulted in C/N ratios of 10:1, 20:1 and 30:1) were used for the experiment. The substrate type had a major influence on the total bacterial community, while the methanogens were less affected. The members of the class Clostridia (phylum Firmicutes) were predominant regardless of mixture ratio (C/N ratio), but at species level there was a major difference between the low and high C/N ratio samples. The hydrogenotrophic methanogenic genus of Methanothermobacter was predominant in all samples but higher C/N ratio sequences affiliated to the genus Methanosarcina were also detected. The appearance of Methanosarcina sp. is most likely due to the less inhibition of ammonia during the anaerobic digestion.

Keywords
Ammonia; Bacterial community; Thermophilic; Hydrogenotrophic methanogen; Terminal restriction fragment-length polymorphisms
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Variation of the microbial community in thermophilic anaerobic digestion of pig manure mixed with different ratios of rice straw
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 122, Issue 3, September 2016, Pages 334–340
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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