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Estimation of Ammonia Emission During Composting Iivestock Manure Based on the Degree of Compost Maturity

축분 퇴비화 과정 중 퇴비 부숙도를 고려한 암모니아 발생량 산정

  • 김기연 (신시내티 대학교 환경보건학과) ;
  • 최홍림 (서울대학교 농생명공학부) ;
  • 고한종 (한국방송통신대학교) ;
  • 김치년 (연세대학교 의과대학 산업보건연구소)
  • Published : 2006.02.28

Abstract

Principal aim of this study is to suggest the statistical equation model which can predict an amount of ammonia emission according to the degree of compost maturity during composting livestock manure. Composting process was classified with intial, midterm and final phase based on germination index of compost samples. Total Kjeldahl nitrogen(TKN) and organic matter(OM) were selected as the independent variables available to contribute to ammonia emission from composting pile. Ammonia concentration measured in the samples taken at the intial phase was about 10ppm, sharply increased to 50ppm at the midterm phase, and gradually decreased to about 10ppm. The contents of Total Kjeldahl nitrogen and organic matter through whole composting period were ranged from 0.6 to 1.2% and from 30 to 40%, respectively, were reduced slightly at the midterm phase, but generally showed no constant fluctuation pattern. In estimating ammonia emission with application of the statistical equation model, the coefficients of independent variables at the midterm phase when an average concentration of ammonia was highest showed a relatively high values whereas those at the initial phase when an that of ammonia was lowest indicated a relatively low values. However, no statistical significance was found in the coefficients of independent variables and the equation model. Additionally, the further research, which can include the considerable analysis data with more samples taken than this study, is needed in order to suggest the statistically significant equation model available to predict ammonia emission during composting process.

Keywords

Statistical equation model;Compost maturity;Composting process;Ammonia

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