Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Investigation of Sewage Sludge as Raw Compost Material in Korea

국내 하수오니에 대한 퇴비원료로의 활용성 검토

  • Kwon, Soon-Ik (National Institute of Agricultural Science and Technology, RDA) ;
  • Lim, Dong-Kyu (National Institute of Agricultural Science and Technology, RDA) ;
  • Lee, Sang-Beom (National Institute of Agricultural Science and Technology, RDA) ;
  • Kim, Kye-Hoon (The University of Seoul) ;
  • Koh, Mun-Hwan (National Institute of Agricultural Science and Technology, RDA)
  • Published : 2003.06.30
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Abstract

The objective of this experiment was to investigate the possibility on agricultural use of muncipal sewage sludge with respect to heavy metal contents in Korea. Metal contents (mg/kg) in 88 sludge samples were ranged from 0 to 54.3 for As, 1,7 to 197.3 for Cd, 7.3 to 2,854 for Cr, 87.4 to 5,730 for Cu, 129.3 to 10,289 for Mn 20.1 to 2,057 for Ni, 7.6 to 197.5 for Pb, and 523.5 to 6,349 for Zn. Heavy metal contents of sludges were compared with the regulation on raw material for compost. All sludges produced from sewage treatment plane in metropolis (over a million in population) and large cities ($500,00{\sim}1,000,000$) were not compatible with the regulation. In addition, 95% of sludge from small and mid-size cities ($100,00{\sim}500,000$) and 93% from rural area (below 100,000) were not suitable. On the basis of Cd, Cu, Ni and Zn contents, 41, 53, 47, and 89% of sludge samples were not compatible with the regulation on raw material for compost respectively.

국내에서 발생되는 하수오니에 대한 퇴비원료로의 활용성을 검토하기 위하여 전국 150개소의 하수처리장 중에서 82개소로부터 88점의 하수오니를 채취하여 중금속 함량을 분석하였다. 하수오니의 구분은 하수처리장이 위치한 지역의 인구를 기준으로 광역시(100만명 이상), 대도시(50만${\sim}$100만명), 중소도시(10만${\sim}$50만명) 및 농촌지역(인구 10만명 이하 소도시 포함)으로 구분하여 몇 가지 중금속을 분석하고 현재의 퇴비원료 기준과 비교 검토하였다. 성분별 전국적인 분포는 As $0.0{\sim}54.3\;mg/kg$, Cd $1.7{\sim}197.3\;mg/kg$, Cr $7.3{\sim}2,854\;mg/kg$, Cu $87.4{\sim}5,730\;mg/kg$, Mn $129.3{\sim}10,289\;mg/kg$, Ni $20.1{\sim}2,057\;mg/kg$, Pb $7.6{\sim}197.5\;mg/kg$, Zn $523.5{\sim}6,349\;mg/kg$의 범위에 있었다. 퇴비원료기준과 비교하였을 때 As, Cd, Cr, Cu, Ni, Pb 및 Zn 중 어느 한 성분이라도 함량이 초과하는 비율은 광역시 및 대도시는 100%, 중소도시 95%, 농촌지역 93%로 나타났다. 중금속 성분별로는 전체시료 중 As는 1%, Cd 41%, Cr 15%, Cu 53%, Ni 47%, Pb 2% 및 Zn은 89%가 기준치를 초과하였다.

Keywords

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