Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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The Impacts of Barley Straw Burning Having Different Moisture Contents and Harvesting Timing on Air Pollutant Emission

보릿짚의 수분함량 및 수확시기가 소각시 대기오염물질 발생에 미치는 영향

  • Ko, Jee-Yeon (National Institute of Crop Science, Yeongnam Agricultural Research Institute, Plant Environment Division) ;
  • Kang, Hang-Won (National Institute of Crop Science, Yeongnam Agricultural Research Institute, Plant Environment Division) ;
  • Lee, Jae-Sang (National Institute of Crop Science, Yeongnam Agricultural Research Institute, Plant Environment Division) ;
  • Kim, Chun-Song (National Institute of Crop Science, Yeongnam Agricultural Research Institute, Plant Environment Division) ;
  • Park, Seong-Tae (National Institute of Crop Science, Yeongnam Agricultural Research Institute, Plant Environment Division) ;
  • Kim, Bok-Jin (Yeongnam University College of Natrual Resources)
  • 고지연 (작물과학원 영남농업연구소 식물환경과) ;
  • 강항원 (작물과학원 영남농업연구소 식물환경과) ;
  • 이재생 (작물과학원 영남농업연구소 식물환경과) ;
  • 김춘송 (작물과학원 영남농업연구소 식물환경과) ;
  • 박성태 (작물과학원 영남농업연구소 식물환경과) ;
  • 김복진 (영남대학교 자연자원대학 농학과)
  • Published : 2004.06.30
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Abstract

This study was carried out to determine impacts of burning of barley straw produced from rice-barley double cropping paddy field on air quality by investigating emissions of greenhouse gases ($CO_2$, $CH_4$ and $N_2O$), air pollution gases (CO, $SO_2$, $H_2S$, $NH_3$ and NO) and particulate matters (PM 10 and PM 2.5). When the barley straw at a rate of 4.5 t/ha was burned at open status, the emitted GHGs amounts were $CO_2$ 376.8 kg/l0a, $CH_4$ 1.56 and $N_2O$ 0.06. The amount of CO emission was the largest among air pollution gases. These results showed that the range of $45{\sim}55%$ of total C in barley straw was emitted as $CO_2-C$, followed by CO-C ($6.4{\sim}5.9%$) and $CH_4-C$ ($0.5{\sim}0.7%$). As far as moisture content in barley straw is concerned, the higher moisture content that the barley straw contains, the larger amount of air pollution gases and the higher portion of PM 2.5 in PM 10 were emitted when it burned. In case of harvesting time of barley straw, emission amounts of greenhouse, air pollution gases and PM 2.5 portion in PM 10 had tendency to increase when earlier harvested barley straw was burned.

영남지방 벼-보리 이모작답에서 가장 널리 시행되고 있는 보릿짚 처리방법인 소각이 대기환경에 미치는 영향을 소각시 발생하는 온난화가스, 대기오염가스 및 분진발생량을 중심으로 살펴보았다. 보릿짚 소각시 온난화가스 발생량은 $CO_2$ 376.8, $CH_4$ 1.56, $N_2O$ 0.05 kg/10a로서 $CO_2$의 발생량이 가장 많았으며, 대기 오염가스 중에는 유기물의 불완전 연소시 배출되는 CO발생 량이 28.8 kg/10a로서 가장 많았다. 그 외 SO_2$, $H_2S$, $NH_3$, NO 등의 질소 및 황 함유 유해가스도 소량 발생되었고 발생된 PM 10 분진의 대부분은 인체에 미치는 영향이 PM 10보다 큰 PM 2.5로 이루어져 있었다. 또한 수확시기가 빠르거나 수분함량이 높은 보릿짚일수록 온난화가스 및 대기오염 가스의 발생량이 증가하고 소각 연기 내 PM 10분진 중 PM 2.5의 미세분진 비중이 높았다. 수확적기로 알려진 출수 40일 이후의 보릿짚은 출수 후 40일된 보릿짚 소각시 발생하는 대기오염가스 발생량과 큰 차이가 없었다.

Keywords

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