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Reduction of Methane Emission during Slurry Storage by the Addition of Effective Microorganisms and Excessive Carbon Source from Brewing Sugar
Author(s) -
Bastami Mohd Saufi B.,
Jones Davey L.,
Chadwick David R.
Publication year - 2016
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq2015.11.0568
Subject(s) - slurry , chemistry , nitrous oxide , ammonia , carbon dioxide , microorganism , methane , sugar , manure , pulp and paper industry , environmental chemistry , carbon fibers , waste management , food science , environmental science , agronomy , bacteria , environmental engineering , organic chemistry , materials science , biology , composite number , composite material , genetics , engineering
Storing livestock manure is the primary stage of manure management where microbial processes and chemical reactions result in the release of methane (CH 4 ), nitrous oxide (N 2 O), ammonia (NH 3 ), and carbon dioxide (CO 2 ). This study examined the reduction of CH 4 emissions from slurry storage under two temperatures (cool [10°C] and warm [30°C]) when a glucose‐rich substrate (brewing sugar) and activated effective microorganisms were applied at 10% (w/w) and 5% (v/w), respectively. Brewing sugar addition influenced microbial anaerobic respiration, resulting in a reduction of slurry pH to <5.0, through “self‐acidification” caused by lactic acid production. Subsequently, CH 4 emissions were significantly reduced by 87 and 99% in the cool and warm environments, respectively. The effective microorganism treatment did not change the chemical characteristics of the slurry but reduced CH 4 emissions by 17 and 27% ( P < 0.05) in the cool and warm environments, respectively. These results suggest that self‐acidification after addition of a carbon source may be a promising alternative to slurry acidification using concentrated acids. Core Ideas Glucose addition leads to slurry self‐acidification by lactic acid production. Self‐acidification of slurry (pH <5.0) reduced CH 4 emissions by >85%. Bio‐augmentation with effective microorganisms reduced CH 4 emissions by 17–27%.