Insight into the effects of biochar on manure composting: Evidence supporting the relationship between N2O emission and denitrifying community

Wang, Cheng, Lu, Haohao, Dong, Da, Deng, Hui, Strong P.J., Wang, Hailong and Wu, Weixiang (2013) Insight into the effects of biochar on manure composting: Evidence supporting the relationship between N2O emission and denitrifying community. Environmental Science and Technology, 47 13: 7341-7349. doi:10.1021/es305293h


Author Wang, Cheng
Lu, Haohao
Dong, Da
Deng, Hui
Strong P.J.
Wang, Hailong
Wu, Weixiang
Title Insight into the effects of biochar on manure composting: Evidence supporting the relationship between N2O emission and denitrifying community
Formatted title
Insight into the effects of biochar on manure composting: Evidence supporting the relationship between N2O emission and denitrifying community
Journal name Environmental Science and Technology   Check publisher's open access policy
ISSN 0013-936X
1520-5851
Publication date 2013-07-01
Year available 2013
Sub-type Article (original research)
DOI 10.1021/es305293h
Volume 47
Issue 13
Start page 7341
End page 7349
Total pages 9
Place of publication Washington, DC United States
Publisher American Chemical Society
Language eng
Formatted abstract
Although nitrous oxide (N2O) emissions from composting contribute to the accelerated greenhouse effect, it is difficult to implement practical methods to mitigate these emissions. In this study, the effects of biochar amendment during pig manure composting were investigated to evaluate the inter-relationships between N2O emission and the abundance of denitrifying bacteria. Analytical results from two pilot composting treatments with (PWSB, pig manure + wood chips + sawdust + biochar) or without (PWS, pig manure + wood chips + sawdust) biochar (3% w/w) demonstrated that biochar amendment not only lowered NO2 --N concentrations but also lowered the total N2O emissions from pig manure composting, especially during the later stages. Quantification of functional genes involved in denitrification and Spearman rank correlations matrix revealed that the N2O emission rates correlated with the abundance of nosZ, nirK, and nirS genes. Biochar-amended pig manure had a higher pH and a lower moisture content. Biochar amendment altered the abundance of denitrifying bacteria significantly; less N2O-producing and more N2O-consuming bacteria were present in the PWSB, and this significantly lowered N2O emissions in the maturation phase. Together, the results demonstrate that biochar amendment could be a novel greenhouse gas mitigation strategy during pig manure composting.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
 
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