Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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Reduction of ammonia conversion from urea by adding acetohydroxamic acid

Acetohydroxamic acid 이용한 Urea로부터 암모니아 발생 저감 연구

  • Yun, Gwang Su (Department of Environmental Engineering, Chungbuk National University) ;
  • Oh, Ha Eun (Division of Animal Environment, National Institute of Animal Science) ;
  • Jung, Min Woong (Division of Animal Environment, National Institute of Animal Science) ;
  • Hwang, Okhwa (Division of Animal Environment, National Institute of Animal Science) ;
  • Yun, Yeo-Myeong (Department of Environmental Engineering, Chungbuk National University)
  • 윤광수 (충북대학교 환경공학과) ;
  • 오하은 (국립축산과학원 축산과학과) ;
  • 정민웅 (국립축산과학원 축산과학과) ;
  • 황옥화 (국립축산과학원 축산과학과) ;
  • 윤여명 (충북대학교 환경공학과)
  • Received : 2021.09.15
  • Accepted : 2021.09.23
  • Published : 2021.12.30
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Abstract

Ammonia, primarily originating from urinary urea of the livestock manure, is known to play as a major precursor of fine particulate matter (PM2.5) generation which leads to a decrease in air quality and to harmful effects on public health. The objective of this study was to evaluate the effect of acetohydroxamic acid (AHA) addition on inhibition of ammonia conversion from urea. The experiment was performed at different urea concentration (500-4,000 mg Urea-N/L), AHA concentration (0-4,000 mg AHA/L), pHs (pH 6-10), and temperature (10-35℃). The result showed that the urease inhibition efficiency increased at higher concentration of AHA. However, the specific urease inhibition activity decreased at higher pH, showing 867.1±6.7 Unit/g AHA at pH 6 and 1,167.9±17.4 Unit/g AHA at pH 10, respectively. Decreased urease inhibition efficiency at both AHA and control was observed at higher temperature. This finding indicates that AHA can be used as the urease inhibitor for reducing ammonia emission in the management of livestock manure.

가축분뇨의 요소에서 유래하는 암모니아는 미세먼지(PM2.5) 생성의 주요 전구체로 작용하여 대기질을 저하시키고 공중 보건에 유해한 영향을 미치는 것으로 알려져 있다. 본 연구의 목적은 Acetohydroxamic acid(AHA)의 주입에 따른 요소로부터 암모니아 전환의 억제에 대한 효과를 평가하는 것이었다. 실험은 다양한 요소 농도(500-4,000 mg Urea-N/L), AHA 농도(0-4,000 mg AHA/L), pH(pH 6-10) 및 온도(10-35℃)범위에서 수행되었다. 그 결과 AHA 농도가 높을수록 Urease 억제 효율이 증가함을 보여주었다. 그러나 특정 Urease 억제 활성은 pH가 높을수록 감소하여 pH 6에서 867.1±6.7 Unit/g AHA, pH 10에서 1,167.9±17.4 Unit/g AHA를 나타냈다. AHA와 대조군 모두에서 높은 온도에서 요소분해효소 억제 효율이 감소됨을 확인하였다. 본 연구결과를 통해 AHA가 가축분뇨 관리에서 암모니아 배출을 줄이기 위한 요소분해효소 억제제로 사용될 수 있음을 확인하였다.

Keywords

Acknowledgement

본 연구는 농촌진흥청 공동연구사업(과제번호: pJ014861)과 농림식품기술기획평가원 공동연구사업(과제번호: 321088051)의 지원을 받아 수행하였습니다.

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