title: Deodorization of pig manure using lignin peroxidase with different electron acceptors.
abstract: Odor pollution is a big environmental problem caused by large-scale livestock production in China, and developing a practical way to reduce these odors is pressing. In this study, a combination of 0.2-1.0 U/mL lignin peroxidase (LiP) and one of three peroxides (H2O2, CaO2, 2Na3CO3·3H2O2) was examined for its efficiency in reducing the release of eight chemicals (propionic acid, isobutyric acid, isocaproic acid, isovaleric acid, phenol, p-cresol, indole, and skatole), NH3, H2S, and odor intensity from pig manure. The results showed an approximately 90% reduction in p-cresol, 40-60% reduction in odor intensity, 16.5-40% reduction in indolic compounds, and 25-40% reduction in volatile fatty acids. Being the electron acceptors of LiP, 2Na3CO3·3H2O2 and CaO2 performed better than H2O2 in reducing the concentration of eight chemicals, NH3, H2S, and odor intensity from pig manure. The effect of deodorization can last for up to 72 hr.
  
  
  CONCLUSIONS
  In China, one of the major environmental problems caused by confined feeding is odor pollution, which brings a major threat to the sustainability, profitability, and growth of the livestock industry. To couple the LiP with the electron acceptors, a low-cost, simple, and feasible method for odor removal was established in this study. Based on the study results, a practical treatment method was provided for odor pollution and supply the farm operators a more flexible time to dispose treated manure.
authors.affiliation: a Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Science; Environmental Microbiology Key Laboratory of Sichuan Province , Chengdu , People's Republic of China.
authors.forename: ZhiYing
authors.initials: Z
authors.lastname: Yan
authors.affiliation: b Chongqing Academy of Agricultural Sciences , Chongqing , People's Republic of China.
authors.forename: XiuLi
authors.initials: X
authors.lastname: Wei
authors.affiliation: a Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Science; Environmental Microbiology Key Laboratory of Sichuan Province , Chengdu , People's Republic of China.
authors.forename: YueXiang
authors.initials: Y
authors.lastname: Yuan
authors.affiliation: a Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Science; Environmental Microbiology Key Laboratory of Sichuan Province , Chengdu , People's Republic of China.
authors.forename: ZhiDong
authors.initials: Z
authors.lastname: Li
authors.affiliation: a Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Science; Environmental Microbiology Key Laboratory of Sichuan Province , Chengdu , People's Republic of China.
authors.forename: Dong
authors.initials: D
authors.lastname: Li
authors.affiliation: a Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Science; Environmental Microbiology Key Laboratory of Sichuan Province , Chengdu , People's Republic of China.
authors.forename: XiuFeng
authors.initials: X
authors.lastname: Liu
authors.affiliation: b Chongqing Academy of Agricultural Sciences , Chongqing , People's Republic of China.
authors.forename: LiHong
authors.initials: L
authors.lastname: Gao
mesh_terms: D000818:Animals; D008372:Manure; D009812:Odorants / Q000517:prevention & control*; D010544:Peroxidases / Q000378:metabolism*; D010545:Peroxides / Q000378:metabolism*; D013552:Swine
chemical_list: D008372:Manure; D010545:Peroxides; D010544:Peroxidases; C042858:lignin peroxidase