Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Development of Sewage Treatment Apparatus for Detached House in Agricultural Village by Natural Purification Method

자연정화공법에 의한 농촌 전원 독립가구 하수처리장치 개발

  • Seo, Dong-Cheol (Division of Applied Life Science, Gyeongsang National University) ;
  • Park, Mi-Ryoung (Division of Applied Life Science, Gyeongsang National University) ;
  • Kim, Hyung-Jun (Division of Applied Life Science, Gyeongsang National University) ;
  • Cho, In-Jae (Division of Applied Life Science, Gyeongsang National University) ;
  • Lee, Hong-Jae (Department of Environmental Engineering, Jinju National University) ;
  • Sung, Sun-Jin (Division of Applied Life and Environmental Sciences, 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 (경상대학교 응용생명과학부) ;
  • 박미령 (경상대학교 응용생명과학부) ;
  • 김형준 (경상대학교 응용생명과학부) ;
  • 조인재 (경상대학교 응용생명과학부) ;
  • 이홍재 (진주산업대학교 환경공학과) ;
  • 성성진 (순천대학교 생명환경과학부) ;
  • 조주식 (순천대학교 생명환경과학부) ;
  • 허종수 (경상대학교 응용생명과학부)
  • Published : 2006.09.30
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Abstract

To develop small-scale sewage treatment apparatus for detached house of agricultural village, a small-scale sewage treatment apparatus by natural purification method that consisted of packaged form of aerobic, anoxic and anaerobic bed was constructed. The efficiency of sewage treatment according to the sewage treatment method, sewage loading, and the injection method of sewage were investigated for small-scale sewage treatment apparatus of packaged form of aerobic, anoxic and anaerobic bed. The removal rate of pollutants according to the sewage treatment method for small-scale sewage treatment apparatus was high in the order of aerobic-anoxic-anoxic bed < aerobic-anoxic-anaerobic bed. The optimum filter media in small-scale sewage treatment apparatus was a broken stone. The removal rate of pollutants according to sewage loading in small-scale sewage treatment apparatus was high in the order of $1,200L/m^2{\cdot}day\fallingdotseq900L/m^2{\cdot}day\fallingdotseq600L/m^2{\cdot}day$. The removal rate of pollutants according to injection method of sewage in small-scale sewage treatment apparatus was high in the order of continuous injection $\fallingdotseq$ intermittent injection. When loaded under the optimum conditions, removal rate of BOD, COD, SS, T-N and T-P were 99, 95, 99, 83 and 96%, respectively, through this 3-stepped small-scale treatment apparatus arrayed with the order of aerobic, anoxic and anaerobic bed.

자연정화공법에 의한 농촌 전원 독립가구 하수처리공법 개발을 위하여 호기성조와 혐기성조가 분리된 소형 하수처리 장치에서 혐기성조 위에 호기성조를 포갠 일체형으로 공법을 개선한 소형 하수처리장치를 설계 및 시공하여 하수처리공법별, 하수 부하량 및 하수 주입방법에 따른 수처리 효율을 조사하였다. 소형 하수처리장치의 최적공법은 호기-무산소-혐기조건이었으며, 최적여재는 쇄석이었고, 최적 하수 부하량은 $1,200L/m^3{\cdot}day$이었다. 이러한 조건에서 농촌 전윈 독립가구에서 간헐적으로 배출되는 하수에 대한 대응성을 조사하기 위해 하수 주입방법에 따른 하수처리효율을 조사한 결과 농촌 전원 독립가구 하수처리공법으로 개발된 호기-무산소-혐기조건인 소형 하수처리장치는 실제 농촌 전원독립가구에서 간헐적으로 발생되는 하수에 그대로 적용하더라도 현행 방류수 수질기준인 BOD 20 mg/L, COD 40 mg/L, SS 20 mg/L, T-N 60 mg/L 및 T-P 8 mg/L을 만족할 뿐만 아니라, 방류수 수질기준이 앞으로 BOD 10 mg/L, T-N 20 mg/L 및 T-P 2 mg/L로 강화되더라도 안정적으로 처리될 수 있을 것으로 판단된다. 이상의 결과에서 농촌 전원 독립가구 하수처리공법으로 개발한 호기-무산소-혐기조건인 소형 하수처리장치는 BOD 99%, COD 95%, SS 99%, T-N 83% 및 T-P 96%초 질소 처리효율을 호기성조와 혐기성조가 분리된 소형 하수처리장치에 비해 17%정도 향상시켰으며, 모든 조가 일체형이므로 부지면적을 최소화할 수 있다. 따라서 본 공법은 자연정화공법의 단점을 보완할 수 있으므로 농촌 전원 독립가구에 적합할 것으로 사료된다.

Keywords

References

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