title: Reducing odorous VOC emissions from swine manure using soybean peroxidase and peroxides.
abstract: The objective of the research was to determine the optimum application rates of soybean peroxidase (SBP) plus peroxide (SBPP) for reducing odorous VOC emissions from swine manure. Industrial-grade SBP was applied in combination with liquid hydrogen peroxide (H(2)O(2)) or powdered calcium peroxide (CaO(2)) to standard phenolic solutions and swine manure, and emissions were measured in a wind tunnel. The primary odorant in the untreated manure was 4-methylphenol, which accounted for 68-81% of the odor activity value. At the optimum application rate of SBPP (50 g L(-1)), 4-methylphenol emissions were reduced from the swine manure by 62% (H(2)O(2)) and 98% (CaO(2)) after 24h (P<0.0001). The CaO(2) had a longer residence time, remaining effective for 48 h with 92% reduction in emission rates (P<0.0001), while H(2)O(2) was similar to the control at 48 h (P=0.28).
authors.affiliation: Palo Duro Research Center, West Texas A&M University, Canyon, TX 79016, United States. dparker@wtamu.edu
authors.forename: David B
authors.initials: DB
authors.lastname: Parker
authors.forename: Lingshuang
authors.initials: L
authors.lastname: Cai
authors.forename: Ki-Hyun
authors.initials: KH
authors.lastname: Kim
authors.forename: Kristin E
authors.initials: KE
authors.lastname: Hales
authors.forename: Mindy J
authors.initials: MJ
authors.lastname: Spiehs
authors.forename: Bryan L
authors.initials: BL
authors.lastname: Woodbury
authors.forename: Audrey L
authors.initials: AL
authors.lastname: Atkin
authors.forename: Kenneth W
authors.initials: KW
authors.lastname: Nickerson
authors.forename: Krista D
authors.initials: KD
authors.lastname: Patefield
mesh_terms: D000818:Animals; D017610:Calcium Compounds / Q000737:chemistry; D002138:Calibration; D008372:Manure; D009812:Odorants; D010087:Oxides / Q000737:chemistry; D010544:Peroxidases / Q000737:chemistry*; D010545:Peroxides / Q000737:chemistry*; D013025:Glycine max / Q000201:enzymology*; D013552:Swine; D055549:Volatile Organic Compounds / Q000302:isolation & purification*
chemical_list: D017610:Calcium Compounds; D008372:Manure; D010087:Oxides; D010545:Peroxides; D055549:Volatile Organic Compounds; C016538:lime; D010544:Peroxidases