Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Analysis of Water System Impacts of Effluent from Agricultural and Industrial Complex Wastewater Treatment Facilities Using Numerical Analysis and Water Quality Modeling: A Method for Selecting an Appropriate Model

수치해석 및 수질모델링을 활용한 농공단지 폐수처리시설 방류수의 수계영향성 분석 및 적정 모델의 선정방안 제시

  • Lee, In-Koo (Dept. of Convergence Technology, Graduate School of Venture, Hoseo Univ., Institute of Health Industry, Hoseo Univ.) ;
  • Kang, Soon-Ah (Dept. of Convergence Technology, Graduate School of Venture, Hoseo Univ., Institute of Health Industry, Hoseo Univ.)
  • 이인구 (호서대학교 벤처대학원 융합공학과, 호서대학교 보건산업연구소 ) ;
  • 강순아 (호서대학교 벤처대학원 융합공학과, 호서대학교 보건산업연구소)
  • Received : 2024.09.25
  • Accepted : 2024.10.14
  • Published : 2024.10.31
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Abstract

This study investigates the impact of aluminum and water pollutants present in the effluent from wastewater treatment plants associated with agricultural and industrial facilities in the Geumgang waterway. The average aluminum concentration in the effluent from these facilities ranged from 0.19-3.14 mg/L. The R2 values between the predicted and measured values at the confluence were 0.9237 and 0.9758, respectively, with an average aluminum concentration of 0.051 mg/L observed 10 km downstream. During the model calibration process, QUALKO2 outperformed QUAL2E, showing percent bias values of less than 11.9% and 18.9% for BOD and Chl-a, respectively. However, both models demonstrated similar performance in predicting T-N and T-P concentrations, as they both consider abiotic organic nitrogen and phosphorus. In conclusion, the impact of aluminum and water pollutants in the effluent from the Geumgang River agricultural and industrial complex wastewater treatment plant is relatively low. Nonetheless, for the safety of drinking water, continuous monitoring and proper maintenance of aluminum levels and water quality are essential.

본 연구에서는 농공단지 폐수처리장 배출수에 포함된 알루미늄 및 수질오염물질이 금강수계에 미치는 영향을 알아보고자 하였다. 그 결과, 농공단지 폐수처리장에서 배출되는 폐수 중 응집제 사용에 따른 알루미늄 농도는 평균 0.19~3.14mg/L로 분석되었다. 합류점에서의 예측값과 측정값의 상관계수는 각각 0.9237과 0.9758로 나타났으며, 하류 10km에서의 알루미늄 농도는 평균 0.051mg/L로 나타났다. 수질 모델링의 경우 먼저 모델 보정 과정을 통해 QUALKO2 및 QUAL2E 모델의 오차율이 20% 이내로 개선되어 모델의 신뢰성을 확인하였다. 특히, BOD 모의결과 QUALKO2 모델이 QUAL2E 모델에 비해 낮은 오차율을 보였으며 T-N 및 T-P 모의 결과 조류 호흡에 따른 비생물적 유기질소와 유기인을 고려하면 QUAL2E 모델과 QUALKO2 모델의 차이는 크지 않았다. 요약하면, 농공단지 폐수처리장의 방류수에 포함된 알루미늄 및 수질오염물질의 영향은 상대적으로 낮은 것으로 나타났으며 식수의 안전성을 고려하여 알루미늄 및 수질에 대한 모니터링과 적절한 유지 관리가 필요할 것으로 사료된다.

Keywords

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