Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Evaluation of Korean Water Quality Standards in Winter by Characteristics and Statistical Analyses of the Effluent Water Quality at the Sewage Treatment Plants in Korea

우리나라 공공하수처리시설의 방류수 수질현황 분석을 통한 겨울철 방류수수질기준의 적정성 평가

  • Um, Chul Yong (Department of Civil & Environmental Engineering, Yongsei University) ;
  • Chu, Kyoung Hoon (Department of Civil & Environmental Engineering, Yongsei University) ;
  • Yun, Zu Whan (Department of Environmental Engineering, Korea University) ;
  • Choi, Ik Hoon (Korea Environment Corporation) ;
  • Park, Jae Young (Korea Environment Corporation) ;
  • Lee, Han Saem (Department of Environmental Engineering, Korea University) ;
  • Ko, Kwang Baik (Department of Civil & Environmental Engineering, Yongsei University)
  • 엄철용 (연세대학교 토목.환경공학과) ;
  • 주경훈 (연세대학교 토목.환경공학과) ;
  • 윤주환 (고려대학교 환경시스템공학과) ;
  • 최익훈 (한국환경공단) ;
  • 박재영 (한국환경공단) ;
  • 이한샘 (고려대학교 환경시스템공학과) ;
  • 고광백 (연세대학교 토목.환경공학과)
  • Received : 2011.05.09
  • Accepted : 2011.06.30
  • Published : 2011.07.30
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Abstract

In this study, from 2004 to 2008 influents and discharging effluents from 241 municipal public sewage treatment plants were surveyed. Statistics including average, Coefficient of Variation (CV) and Coefficient of Reliability (COR) for each season, time series analysis for removal efficiency and water quality of effluents, and a comparison of the effluent standards in Korea and other countries were presented. The average concentrations of TN and TP in influents. during winter season were 32.6 and 3.78 mg/L and during other season were 30.8 and 3.61 mg/L in 2008, respectively. The average TN concentration on the basis of the maximum monthly concentrations in the effluents during winter season ranged from 14.2~17.4 mg/L and during other season ranged from 12.2~14.8 mg/L. The TP concentration in the effluents depending on the each season was no big difference. TN removal efficiency decreased from Jan. to Feb. and TP removal efficiency decreased in Jan., Jun and July. Maximum COR during winter season were 0.61 but the COR for TN and TP during other season ranged from 0.96~1.48 and 1.09~1.81, respectively, due to big difference in the standard for TN and TP in effluents depending on the season. TN and TP standards for effluent of sewage treatment during winter season in Korea was much higher than those in other countries. Therefore the lower effluent standards during winter season is essential for the water quality improvement.

Keywords

References

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