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Behavior and Decomposition Velocity of Pollutants on Various Forms from Domestic Sewage in Small-scale Sewage Treatment Plant by Natural Purification Method

자연정화공법에 의한 농촌 전원독립가구 하수처리장에서 하수 중 오염물질의 존재형태별 거동과 분해속도

  • Seo, Dong-Cheol (Wetland Biogeochemistry Institute, Louisiana State University) ;
  • Kim, Hyung-Jun (Division of Applied Life Science, Gyeongsang National University) ;
  • Park, Woo-Young (Division of Applied Life Science, Gyeongsang National University) ;
  • Lim, Jong-Sir (Division of Applied Life Science, Gyeongsang National University) ;
  • Hwang, Seung-Ha (Division of Applied Life Science, Gyeongsang National University) ;
  • Park, Chan-Hoon (Division of Applied Life Science, Gyeongsang National University) ;
  • Choi, Jeong-Hwan (Division of Applied Life Science, Gyeongsang National University) ;
  • Lee, Hong-Jae (Department of Environmental Engineering, Jinju National University) ;
  • Lee, Do-Jin (Department of Agricultural Education, Sunchon National University) ;
  • Cho, Ju-Sik (Division of Applied Life and Environmental Sciences, Sunchon National University) ;
  • Heo, Jong-Soo (Division of Applied Life Science, Gyeongsang National University)
  • 서동철 (루이지애나주립대학교 습지생물지구화학연구소) ;
  • 김형준 (경상대학교 응용생명과학부) ;
  • 박우영 (경상대학교 응용생명과학부) ;
  • 임종서 (경상대학교 응용생명과학부) ;
  • 황승하 (경상대학교 응용생명과학부) ;
  • 박찬훈 (경상대학교 응용생명과학부) ;
  • 최정환 (경상대학교 응용생명과학부) ;
  • 이홍재 (진주산업대학교 환경공학과) ;
  • 이도진 (순천대학교 농업교육과) ;
  • 조주식 (순천대학교 생명환경과학부) ;
  • 허종수 (경상대학교 응용생명과학부)
  • Published : 2008.03.31

Abstract

Behavior and decomposition velocity of pollutants on various forms from domestic sewage in sewage treatment plant were investigated in order to obtain the basic data for improving the removal efficiency of pollutants and to reduce the area in constructed wetland by natural purification method. The removal amounts of BODs and CODs in aerobic bed were significantly higher than those of the other beds. In aerobic bed, the removal amounts of IBOD and ICOD were more than those for SBOD and SCOD, respectively, whereas the removal amounts of BODs and CODs in anoxic and anaerobic beds were little different. The removal amounts of SSs in aerobic bed were also higher than those for the other beds, and the removal amounts of VSS in all beds were more than those for FSS. The removal amounts of DTN and DTP in all beds were more than those for STN and STP, respectively. In addition, the decomposition velocities of TBOD, TCOD and TSS in aerobic bed were 30.79, 17.15 and 29.96 $day^{-1}$. Moreover, the decomposition velocities of BODs, CODs and SSs in aerobic bed were very rapid than those in the other beds. On the other hand, the decomposition velocities of BODs, CODs and SSs in anoxic and anaerobic beds were a little different regardless of the forms of pollutant. The decomposition velocities constants of T-N in aerobic, anoxic and anaerobic beds were 4.78, 0.12 and 0.10 $day^{-1}$, respectively. Moreover, the decomposition velocities constants of T-P in aerobic, anoxic and anaerobic beds were 13.09, 0.12 and 0.13 $day^{-1}$ respectively. The decomposition velocity of T-Ns and T-Ps in aerobic bed were slightly rapid than those in the other beds, whereas the decomposition velocities of T-Ns and T-Ps in anoxic and anaerobic beds were slightly different regardless of the forms of pollutant.

본 연구는 농촌전원독립가구 하수처리장에서 오염물질의 존재형태별 처리 경향을 파악하여 하수처리장의 설계 및 시공 시 부지면적 감소와 오염물질의 처리효율 극대화를 위한 기초자료로 활용하기 위하여 농촌전원독립가구 하수처리장에서 하수 중 오염물질의 거동 특성과 오염물질의 존재형태별 분해속도를 각각 조사하였다. 하수 중 오염물질의 존재형태별 거동을 조사한 결과 BOD 및 COD는 대부분 호기성조에서 처리되었으며, 처리된 BOD와 COD는 대부분 insoluble형태이었다. 그러나 무산소조와 혐기성조에서의 BOD와 COD는 존재형태별로 별 차이 없었다. SS는 대부분 호기성조에서 처리되었으며, 처리된 SS는 대부분 volatile 형태이었다. T-N은 BOD, COD 및 SS와 달리 호기성조에서 처리효율이 높지 않았고, 처리된 대부분의T-N은 dissolved 형태이었다. T-P는 모든 조에서 일정하게 처리효율이 증가되었으며, 처리된 T-P는 대부분 dissolved 형태이었다. 현장 하수처리장에서 존재형태별 오염물질의 분해속도를 조사한 결과 BOD, COD 및 SS의 분해속도는 호기성조에서 각각 30.79, 17.15 및 29.96 $day^{-1}$로 무산소조 및 혐기성조에 비해 매우 빨랐으며, 호기성조에서 존재형태별 분해속도는BOD 및 COD의 경우 insoluble 형태가 빨랐으며, SS의 경우 fixed 형태가 빨랐다. T-N 및 T-P의 분해속도는 호기성조에서 각각 4.78 및 13.09 $day^{-1}$로 다른 조에 비해 약간 빨랐으며, 호기성조에서 존재형태별 분해속도는 suspended 형태가 약간 빨랐고, 혐기성조와 무산소조에서는 별 차이 없이 비슷하였다. 이상의 결과는 하수처리장의 설계 및 시공 시 부지면적 감소와 오염물질의 처리효율 극대화를 위한 기초자료로 활용 할 수 있을 것으로 판단된다.

Keywords

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