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Characteristics of Greenhouse Gas Emissions with Different Combination Rates of Activated Rice Hull Biochar during Aerobic Digestion of Cow Manure

왕겨 활성 바이오차 혼합 비율에 따른 우분 호기소화 시 온실가스 발생 특성

  • Ro, YeonHee (Department of Environmental Energy Engineering, Graduate School, Kyonggi University) ;
  • Chung, WooJin (Department of Environmental Energy Engineering, College of Creative Engineering, Kyonggi University) ;
  • Chung, SeokJoo (Nousbo Co., Ltd) ;
  • Jung, InHo (Nousbo Co., Ltd) ;
  • Na, HongSik (Nousbo Co., Ltd) ;
  • Kim, MinSoo (Department of Environmental Engineering, University of Seoul) ;
  • Shin, JoungDu (Climate Change & Agroecology Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration)
  • 노연희 (경기대학교 일반대학원 환경에너지공학과) ;
  • 정우진 (경기대학교 창의공과대학 환경에너지공학과) ;
  • 정석주 ((주)누보) ;
  • 정인호 ((주)누보) ;
  • 나홍식 ((주)누보) ;
  • 김민수 (서울시립대학교 환경공학과) ;
  • 신중두 (농촌진흥청 국립농업과학원 농업환경부 기후변화생태과)
  • Received : 2020.08.19
  • Accepted : 2020.09.02
  • Published : 2020.09.30

Abstract

BACKGROUND: Among the biomass conversion techniques of livestock manure, composting process is a method of decomposing organic matter through microorganisms, and converting it into fertilizer in soil. The aerobic composting process is capable of treating cow manure in large quantities, and produces greenhouse gas as CO2 and N2O, although it has economical benefit. By using the activated rice hull biochar, which is a porous material, it was intended to mitigate the greenhouse gas emissions, and to produce the compost of which quality was high. Objective of this experiment was to estimate CO2 and N2O emissions through composting process of cow manure with different cooperated biochar contents. METHODS AND RESULTS: The treatments of activated rice hull biochar were set at 0%, 5%, 10% and 15%, respectively, during composting cow manure. The CO2 emission in the control was 534.7 L kg-1, but was 385.5 L kg-1 at 15% activated rice hull biochar. Reduction efficiency of CO2 emission was estimated to be 28%. N2O emission was 0.28 L kg-1 in the control, but was 0.03 L min-1 at 15% of activated rice hull biochar, estimating about 89% reduction efficiency. CONCLUSION: Greenhouse gas emissions during the composting process of cow manure can be reduced by mixing with 15% of activated rice hull biochar for eco-friendly compost production.

Keywords

References

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