TY - JOUR
T1 - Composition and Toxicity of Biogas Produced from Different Feedstocks in California
AU - Li, Yin
AU - Alaimo, Christopher P.
AU - Kim, Minji
AU - Kado, Norman Y.
AU - Peppers, Joshua
AU - Xue, Jian
AU - Wan, Chao
AU - Green, Peter G.
AU - Zhang, Ruihong
AU - Jenkins, Bryan M.
AU - Vogel, Christoph F.A.
AU - Wuertz, Stefan
AU - Young, Thomas M.
AU - Kleeman, Michael J.
N1 - Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019
Y1 - 2019
N2 - Biogas is a renewable energy source composed of methane, carbon dioxide, and other trace compounds produced from anaerobic digestion of organic matter. A variety of feedstocks can be combined with different digestion techniques that each yields biogas with different trace compositions. California is expanding biogas production systems to help meet greenhouse gas reduction goals. Here, we report the composition of six California biogas streams from three different feedstocks (dairy manure, food waste, and municipal solid waste). The chemical and biological composition of raw biogas is reported, and the toxicity of combusted biogas is tested under fresh and photochemically aged conditions. Results show that municipal waste biogas contained elevated levels of chemicals associated with volatile chemical products such as aromatic hydrocarbons, siloxanes, and certain halogenated hydrocarbons. Food waste biogas contained elevated levels of sulfur-containing compounds including hydrogen sulfide, mercaptans, and sulfur dioxide. Biogas produced from dairy manure generally had lower concentrations of trace chemicals, but the combustion products had slightly higher toxicity response compared to the other feedstocks. Atmospheric aging performed in a photochemical smog chamber did not strongly change the toxicity (oxidative capacity or mutagenicity) of biogas combustion exhaust.
AB - Biogas is a renewable energy source composed of methane, carbon dioxide, and other trace compounds produced from anaerobic digestion of organic matter. A variety of feedstocks can be combined with different digestion techniques that each yields biogas with different trace compositions. California is expanding biogas production systems to help meet greenhouse gas reduction goals. Here, we report the composition of six California biogas streams from three different feedstocks (dairy manure, food waste, and municipal solid waste). The chemical and biological composition of raw biogas is reported, and the toxicity of combusted biogas is tested under fresh and photochemically aged conditions. Results show that municipal waste biogas contained elevated levels of chemicals associated with volatile chemical products such as aromatic hydrocarbons, siloxanes, and certain halogenated hydrocarbons. Food waste biogas contained elevated levels of sulfur-containing compounds including hydrogen sulfide, mercaptans, and sulfur dioxide. Biogas produced from dairy manure generally had lower concentrations of trace chemicals, but the combustion products had slightly higher toxicity response compared to the other feedstocks. Atmospheric aging performed in a photochemical smog chamber did not strongly change the toxicity (oxidative capacity or mutagenicity) of biogas combustion exhaust.
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U2 - 10.1021/acs.est.9b03003
DO - 10.1021/acs.est.9b03003
M3 - Article
C2 - 31479247
AN - SCOPUS:85072791925
SN - 0013-936X
VL - 53
SP - 11569
EP - 11579
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 19
ER -
