Reducing odorous VOC emissions from swine manure using soybean peroxidase and peroxides

Authors

• David B. Parker, West Texas A&M UniversityFollow
• Lingshuang Cai, USDA-ARS, U.S. Meat Animal Research Center
• Ki-Hyun Kim, Sejong UniversityFollow
• Kristin E. Hales, USDA-ARS, U.S. Meat Animal Research CenterFollow
• Mindy J. Spiehs, USDA-ARS, U.S. Meat Animal Research CenterFollow
• Bryan L. Woodbury, USDA-ARS, U.S. Meat Animal Research CenterFollow
• Audrey L. Atkin, University of Nebraska - LincolnFollow
• Kenneth Nickerson, University of Nebraska-LincolnFollow
• Krista D. Patefield, University of Nebraska-Lincoln

Document Type

Article

Date of this Version

2012

Citation

Bioresource Technology 124 (2012) 95–104; http://dx.doi.org/10.1016/j.biortech.2012.08.031

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 (H₂O₂) or powdered calcium peroxide (CaO₂) 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% (H₂O₂) and 98% (CaO2) after 24 h (P < 0.0001). The CaO₂ had a longer residence time, remaining effective for 48 h with 92% reduction in emission rates (P < 0.0001), while H₂O₂ was similar to the control at 48 h (P = 0.28).