Analysis of the characteristics of organic matter discharge in the Paldang Lake water system: focusing on the sewage treatment plant located in the inflow tributary

Bogyeon Lee; Kyungik Gil

doi:10.3741/JKWRA.2025.58.8.647

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2025 Vol.58, Issue 8 Preview Page Next Page

Research Article

Analysis of the characteristics of organic matter discharge in the Paldang Lake water system: focusing on the sewage treatment plant located in the inflow tributary 팔당호 수계 내 유기물질의 유출 특성 분석: 유입 지천에 위치한 하수처리장을 중심으로

31 August 2025. pp. 647-656

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Abstract

Paldang Lake is a major water source that supplies approximately 78 million tons of tap water to Seoul and the metropolitan area per day. Approximately 55% of the water flowing into Paldang Lake comes from the Namhan River, and 1.6% comes from the Gyeongancheon Stream. This study aimed to investigate the characteristics of organic matter discharge based on total organic carbon (TOC) in the Namhangang River and Gyeongancheon Stream. In particular, the characteristics and effects of organic matter discharge were investigated with a focus on sewage treatment plants located near the target water system. A total of 14 monitoring sessions were conducted. The concentrations of biodegradable (labile) and non-biodegradable (Refractory) organic matter in the influent and effluent of sewage treatment plants and water systems near the three sewage treatment plants in the study area were investigated. In addition, the effects of organic matter discharge characteristics from the sewage treatment plants and rivers were investigated based on the results of the concentration analysis. This confirmed that biodegradable organic matter was reduced by approximately 95% through sewage treatment. In addition, the results of the 14 monitoring sessions confirmed that the variability in the removal rate was also small, which confirmed that biodegradable organic substances can be stably removed using the current sewage treatment method. In the case of non-biodegradable organic substances, the average removal rate was approximately 63%. In other words, the removal rate of non-biodegradable organic substances is relatively low in sewage treatment plants where biological treatment processes using microorganisms are the main process, but it was confirmed that more than 50% was removed through sedimentation and filtration within the process. Accordinglhy it was concluded that management of non-biodegradable organic substances is necessary in order to manage organic substances present in water systems. In addition, it was revealed that the MBR (Membrane Bioreactor) method, which easily removes particulate organic substances through membrane separation, would be effective in managing non-biodegradable organic substances. This study provides basic information for managing organic substances in sewage treatment plants and water systems.

Keywords

TOC (Total organic carbon)

STP (Sewage treatment plant)

Refractory organic matter

Paldang lake

Inflow stream

팔당호는 서울 및 수도권에 하루 약 7,800만톤의 상수원수를 공급하는 주요한 수원이다. 팔당호로 유입되는 물의 약 55%가 남한강에 해당하며, 1.6%는 경안천에서 유입된다. 본 연구에서는 남한강과 경안천에서의 총유기탄소(Total organic carbon, TOC) 기반 유기물질의 유출 특성을 분석하고자 하였다. 특히 대상 수계 인근에 위치한 하수처리장을 중심으로 유기물질의 유출 특성 및 영향에 대해 파악하고자 하였다. 총 14회의 모니터링이 진행되었다. 하수처리장 유입수 및 방류수, 하수처리장 인근 수계에서의 생분해성, 난분해성 유기물질의 농도를 파악하였다. 또한 농도 분석 결과를 바탕으로 하수처리장 및 하천에서의 유기물질 유출 특성의 영향에 대해 분석하였다. 연구 결과 하수처리장을 통해 생분해성 유기물질이 약 95% 저감되는 것을 확인할 수 있었다. 또한 14회의 모니터링 결과 제거율의 편차 또한 작은 것을 확인할 수 있었으며 이를 통해 생분해성 유기물질의 경우 현재 하수 처리 공법을 통해 안정적으로 제거됨을 확인할 수 있었다. 난분해성 유기물질의 경우 평균 약 63% 정도의 제거율을 나타냈다. 즉 난분해성 유기물질의 경우 미생물을 통해 생물학적 처리 공정이 주요한 하수처리장에서 제거율이 상대적으로 낮으나, 공정 내 침전, 여과 등을 통해 50%이상 제거됨을 확인할 수 있었다. 이를 통해 수계 내 존재하는 유기물질 관리를 위해선 난분해성 유기물질의 관리가 필요함을 파악하였으며, 하수처리장 공법별로 보았을 때, 난분해성 유기물질 관리 시 막분리를 통한 입자성 유기물질의 제거가 용이한 MBR (Membrane Bioreactor)공법이 효과적일 것으로 분석되었다. 본 연구를 통해 하수처리장과 수계 내 유기물질 관리를 위한 기초 자료로 활용될 수 있을 것으로 사료 된다.

키워드

총유기탄소

하수처리장

난분해성 유기물질

팔당호

유입 지천

References

Aguilar-Torrejón, J.A., Balderas-Hernández, P., Roa-Morales, G., Barrera-Díaz, C.E., Rodríguez-Torres, I., and Torres-Blancas, T. (2023). “Relationship, importance, and development of analytical techniques: COD, BOD, and, TOC in water - An overview through time.” SN Applied Sciences,Vol. 5, No. 4, 118.

10.1007/s42452-023-05318-7

Bisutti, I., Hilke, I., and Raessler, M. (2004). “Determination of total organic carbon - an overview of current methods.” TrAC Trends in Analytical Chemistry, Vol. 23, No. 10-11, pp. 716-726.

10.1016/j.trac.2004.09.003

Bitow Meles, D. (2014). Review of methods of wastewater reuse to diminish non-biodegradable organic compounds. Master Thesis, Royal Institute of Technology (KTH), Stockholm, Sweden, pp. 7-19.

Cho, Y.B., Oh, Y.K., Shin, D.C., and Park, C.H. (2014). “Distribution of total organic carbon and correlations between organic matters of sewage treatment plants.” Journal of the Korean Society for Environmental Analysis, Vol. 17, No. 4, pp. 207-214.

10.9765/KSCOE.2014.26.4.207

Han, D.H., and Choi, J.Y. (2011). “Selection of the optimum organic matter index for surface water quality management.” Journal of Environmental Policy, Vol. 10, No. 4, pp. 61-80.

10.17330/joep.10.4.201112.61

Han, J.S., and Han, G.B. (2010). “A study on the effect of chemical pretreatment for livestock wastewater on the linked treatment of sewage.” Journal of the Korea Organic Resources Recycling Association, Vol. 18, No. 1, pp. 89-97.

Heo, S., Im, J., and Gil, K. (2017). “Runoff characteristics of refractory organic matters from Han River Basin during dry days.” Journal of Wetlands Research, Vol. 19, No. 3, pp. 353-358.

10.17663/JWR.2017.19.3.353

Hwang, S.H., and Park, J.C. (2018). “Management of TOC and COD organic matter of effluents in sewage treatment plants.” Journal of Environmental Science International, Vol. 27, No. 4, pp. 261-266.

10.5322/JESI.2018.27.4.261

Kang, C., and Gil, K. (2023). “Analysis of non-biodegradable organic matter leakage characteristics and correlation analysis in Paldang Lake and its upper reaches.” Journal of Wetlands Research, Vol. 25, No. 4, pp. 221-229.

10.17663/JWR.2023.25.4.221

Kim, J.W., Lee, H.S., Lim, H.B., and Shin, H.S. (2023). “Identification of the cause of the difference among TOC quantitative methods according to the water sample characteristics.” Science of The Total Environment, Vol. 875, 162530.

10.1016/j.scitotenv.2023.162530

Lee, B., Kang, C., and Gil, K. (2024). “Effects of upstream pollution patterns on the water quality of Paldang Lake.” Membrane and Water Treatment, Vol. 15, No. 4, pp. 185-192.

10.12989/MWT.2024.15.4.185

Ministry of Environment (ME) (2022). 1st master plan for national water management (2021~2030), accessed 28 March 2025, <https://www.me.go.kr/home/web/policy_data/read.do?menuId=10263&seq=8145>.

Ministry of Environment (ME) (2024). 2023 Statistics of sewerage, accessed 2 April 2025, <https://www.me.go.kr/home/web/policy_data/read.do?menuId=10264&seq=8357>.

Park, J.H., Park, B.K., Lee, J.K., and Rhew, D.H. (2013). “Necessity of refractory organic matters management in total maximum daily loads (TMDLs).” Journal of Korean Society on Water Environment, Vol. 29, No. 3, pp. 393-399.

Seo, H.J., Kang, Y.J., Min, K.W., Lee, K.S., Seo, G.Y., Kim, S.H., Paik, G.J., and Kim, S.J. (2010). “Characteristics of distribution and decomposition of organic matters in stream water and sewage effluent.” Analytical Science and Technology, Vol. 23, No. 1, pp. 36-44.

10.5806/AST.2010.23.1.036

Yoon, S.B., Lee, C.H., and Kim, Y.D. (2023). “A study on TOC monitoring and spatial distribution analysis using a spectrometer in rivers.” Journal of Korea Water Resources Association, Vol. 56, No. 11, pp. 815-822.

10.3741/JKWRA.2023.56.11.815

Information

Publisher :KOREA WATER RESOURECES ASSOCIATION
Publisher(Ko) :한국수자원학회
Journal Title :Journal of Korea Water Resources Association
Journal Title(Ko) :한국수자원학회 논문집
Volume : 58
No :8
Pages :647-656
Received Date : 2025-04-11
Revised Date : 2025-06-04
Accepted Date : 2025-06-11
DOI :https://doi.org/10.3741/JKWRA.2025.58.8.647

Journal of Korea Water Resources Association ISSN:2799-8746(Print) 2799-8754(Online) 한국수자원학회 논문집

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