Journal of odor and indoor environment (실내환경 및 냄새 학회지)

Korean Society for Indoor Environment (한국실내환경학회)
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Effects of pH modulation on the concentrations of odorous compounds from pit slurry of a pig operation building

pH 조절이 돈사 피트 내 슬러리의 악취물질 농도에 미치는 효과

  • Hwang, Okhwa (National Institute of Animal Science, Rural Development Administration) ;
  • Park, Sungkwon (Department of Food Science and Biotechnology, Sejong University) ;
  • Jung, Minwoong (National Institute of Animal Science, Rural Development Administration) ;
  • Han, Deugwoo (National Institute of Animal Science, Rural Development Administration) ;
  • Nho, Whangook (Department of Swine and Poultry Science, Korea National College of Agriculture and Fisheries) ;
  • Cho, Sungback (Institute of Livestock Odor Control)
  • 황옥화 (농촌진흥청 국립축산과학원) ;
  • 박성권 (세종대학교 식품생명공학과) ;
  • 정민웅 (농촌진흥청 국립축산과학원) ;
  • 한덕우 (농촌진흥청 국립축산과학원) ;
  • 노환국 (국립한국농수산대학 중소가축학과) ;
  • 조성백 (축산냄새연구소)
  • Received : 2017.06.24
  • Accepted : 2017.09.19
  • Published : 2018.03.31
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Abstract

In the present study, we evaluated the effect of pH modulation on concentrations of odorous compounds and pollutants in pit slurry from pig operation building. A slurry sample was taken from the pit of a pig operation building where 50 finishing pigs [(Landrase ${\times}$ Yorkshire) ${\times}$ Duroc] were kept. Three levels of pH (6, 8 and 10) were measured and adjusted daily during the incubation periods using chemical reagents of 1 N HCl or 3 N NaOH. Concentrations of odorous compounds and pollutants were analyzed from slurry incubated for 7 days. When these material concentrations were compared with the pH 8 slurry which was the pH of pit slurry, levels of short chain fatty acids, indoles and total organic carbon were reduced 7%, 68% and 2%, respectively, in the pH 6 treatment (P<0.05). Ammonium nitrogen, phenols and total nitrogen concentrations were lower by 31%, 18% and 17%, respectively, than with the pH 10 slurry (P<0.05). When the odor contribution in pH treatments was assessed according to the odor activity value, it was found to be 23% lower in the pH 6 treatment compared with pH 8. The pH modulation would affect odor emissions and microbial activity from pit slurry. Although not all odorous compounds showed the reduction effect with the same pH control, this study can be effectively used as base data when using additives for pH control.

Keywords

Acknowledgement

Grant : 돈사 내부용 냄새저감제의 최적 조합 구명

Supported by : 농촌진흥청

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