Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Characteristics of Pollution Loads from the Combined Sewer during Dry Season

무강우시 합류식 하수관거의 오염부하 특성

  • 원철희 (강원대학교 지역건설공학과) ;
  • 최용훈 (강원대학교 지역건설공학과) ;
  • 박운지 (강원대학교 지역건설공학과) ;
  • 신민환 (강원대학교 지역건설공학과) ;
  • 최중대 (강원대학교 지역건설공학과)
  • Received : 2011.03.28
  • Accepted : 2011.11.14
  • Published : 2011.11.30
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Abstract

We have examined the pollutant load of combined sewer in dry days. Two monitoring sites (C-1, C-2) were equipped with an flowmeter. Monitoring was conducted from September 2004 to April 2006 for 20 months during dry days. Flowrate and concentration of pollutants are lowest from 3 to 6 o'clock, and it is high at 9, 12 and 21 o'clock. Most of organic matters exist in the dissolved state. The results show that pollution loads in C-2 area were 4.5-7.2 times higher than in C-1. Pollutant loads were high on Saturdays. Pollutant loads (kg/ha/day) of C-2 were 1.1-3.1 times higher those of C-1. However there was no significant difference in winter. Analysis of correlation coefficient of water quality parameter indicates that besides of flowrate all items in C-1 site have tight relationship respectively (p<0.01). In C-2 site, correlation coefficient of TP-SS, TP-TN, TP-flowrate, BOD-flowrate, BOD-SS and TN-TP are statistically significant (p<0.01).

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