• 한국환경과학회지
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• 제11권12호
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• pp.1275-1279
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• 2002

This study was performed to improve water demand estimation and analize correlation between generation of domestic sewage and domestic water use. To improve the prediction of water demand estimation, new water demand equation was developed. The results is as follows. $InQ_t = {\beta}_0+{\beta}_1InP_t+{\beta}_2InY_t+{\beta}_3InH_t+{varepsilon}_t$By using the statistical analysis of the "generation of domestic sewage" and "domestic water use", the regression equation between them is formed. The result is as follows. Generation of domestic sewage : 0.8487 $\times$ Domestic water use + 684.57 ($R^2$= 0.972)>$R^2$= 0.972)

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 동계학술발표대회 논문집
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• pp.15-20
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• 2008

The objectives of this study are to analyze the energy independence plan and to propose a suitable sewage treatment plant in Korea. The total amount of electricity consumption for public sewage treatment plant was estimated as 1,182 GWh in 2007. It was estimated that total 16 sewage treatment plants with renewable energy systems produced electricity of 15.2 GWh per year, which could replaced 0.8% of total electricity used for sewage treatment. It was found that domestic sewage treatment plants with power generation plants by digestion gas were installed in 7 places and produced electricity of 13 GWh per year. It was also found that the power generation plants by digestion gas were the most cost-effective for sewage treatment out of the renewable energy systems based on the benefit-cost analysis.

• 설비공학논문집
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• 제22권1호
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• pp.49-55
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• 2010

The objectives of this study are to analyze the energy independence plan and to propose a suitable sewage treatment plant in Korea. The total amount of electricity consumption for public sewage treatment plant was estimated as 1,812 GWh in 2007. It was estimated that total 16 sewage treatment plants with renewable energy systems produced electricity of 15 GWh per year, which could replace 0.8% of total electricity used for sewage treatment. It was found that domestic sewage treatment plants with power generation plants by digestion gas were installed in 7 places and produced electricity of 13 GWh per year. It was also found that the power generation plants by digestion gas were the most cost-effective for sewage treatment plant out of the renewable energy systems based on the benefit-cost analysis.

• 상하수도학회지
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• 제36권2호
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• pp.59-79
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• 2022

Conventional wastewater treatment plants (WWTPs) do not fully remove micropollutants. Enhanced treatment of sewage effluents is being considered or implemented in some countries to minimize the discharge of problematic micropollutants from WWTPs. Representative enhanced sewage treatment technologies for micropollutant removal were reviewed, including their current status of research and development. Advanced oxidation processes (AOPs) such as ozonation and UV/H₂O₂ and adsorption processes using powdered (PAC) and granular activated carbon (GAC) were mainly discussed with focusing on process principles for the micropollutant removal, effect of process operation and water matrix factors, and technical and economic feasibility. Pilot- and full-scale studies have shown that ozonation, PAC, and GAC can achieve significant elimination of various micropollutants at economically feasible costs(0.16-0.29 €/m³). Considering the current status of domestic WWTPs, ozonation and PAC were found to be the most feasible options for the enhanced sewage effluent treatment. Although ozonation and PAC are all mature technologies, a range of technical aspects should be considered for their successful application, such as energy consumption, CO₂ emission, byproduct or waste generation, and ease of system construction/operation/maintenance. More feasibility studies considering domestic wastewater characteristics and WWTP conditions are required to apply ozonation or PAC/GAC adsorption process to enhance sewage effluent treatment in Korea.

• 상하수도학회지
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• 제19권5호
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• pp.557-564
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• 2005

The objective of this study is to evaluate a criteria of intercepting capacity and a reduction goal of overflow pollution load in combined sewer system. In the current criteria of intercepting capacity in the domestic sewage facility standard, it is known that three times of peak sewage (Q) in dry period or runoff flow by 2mm/hr is not appropriate since the intercepted flow is estimated by runoff and show different result even in the same watershed. Though a reduction goal of overflow pollution load can be determined from 1) same level of storm-water runoff pollution load in separated storm sewer, 2) less than 5% sewage load in dry weather period, by the domestic sewage facility standard, the simulated results from storm-water model show large differences between two criteria. While it is predicted that sewage pollution load standard three time larger than separated storm sewer standard in high population density and urbanized area, it is shown that separate storm sewer standard larger than sewage pollution load standard in middle population density and developing area. Accordingly, it is proposed that more reasonable intercepting flow and reduction goal of overflows pollution load should be established to minimize discharging pollution load in combined sewer systems. For the purpose, a resonable standard has to be amended by pollution load balance considering the characteristics of a watershed for generation, collection, treatment, and discharging flow.

• 공업화학
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• 제33권5호
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• pp.532-537
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• 2022

The need for obtaining treated wastewater that meets high quality standards for discharge or reuse necessitates the use of highly efficient wastewater treatment techniques. In the present study, experiments have been carried out to reduce the concentration level of biological oxygen demand (BOD), chemical oxygen demand (COD), and total dissolved solids (TDS) from the wastewater sample. Treatment of sample of a real municipal wastewater collected from a sewage treatment plant (STP) was carried out in an electrochemical membrane bioreactor (EMBR). The EMBR was operated continuously for five days, and readings were taken at regular intervals. This paper has experimental results conducted in EMBR that indicate reduction of BOD, COD, and TDS levels of up to 32.25%, 29.25%, and 31.93%, respectively. Further, it was observed that a current of magnitude of 0.00752 mA was generated due to the metabolic activities of bacteria present in municipal wastewater, which gradually decreased day by day due to the decay of bacteria.

• 한국지반환경공학회 논문집
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• 제10권2호
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• pp.13-20
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• 2009

최근 우리나라의 국민들의 삶의 질이 향상됨에 따라 악취발생문제가 중요한 사회이슈가 되고 있다. 특히 환경기초시설에서 발생하는 악취물질로 인한 민원 중 약 67%가 하수처리장과 음식물쓰레기 처리시설에 의한 것으로 나타났으며, 해양오염방지법 시행규칙개정으로 2012년부터는 하수오니 등의 해양투기가 전면 금지될 예정에 있어 이들 시설의 처리량 증가에 따른 관리대책마련이 시급한 실정이다. 따라서 본 연구에서는 부산시 전역의 하수처리장과 음식물쓰레기처리시설중 상대적으로 폐기물발생량이 많은 5개 하수처리장과 5개 음식물쓰레기처리시설을 선정하여 슬러지 시료를 채집하고 이들 시료에 대한 공업분석, 원소분석, XRF 분석, 발열량분석 등을 통해 시료의 물리, 화학적 특성을 알아내었다. 또한 최종적으로 시료 내 황화수소 발생가능농도 측정을 통해 황화수소발생원단위를 산정, 악취민원의 근본적 대책마련을 위한 기초 자료로써 활용 하고자 하였다. 분석결과, 하수슬러지의 황화수소농도는 평균 57.3mg/kg, 음식물쓰레기처리시설의 것은 19.7mg/kg이었다. 최종적으로 총 10개 시설 폐기물의 황화수소 발생원 단위 산정결과 16,017,910.0mg/d로 예측 되었다.

• 청정기술
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• 제27권1호
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• pp.1-8
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• 2021

미세플라스틱으로 인한 생태환경에 미치는 부정적인 영향들이 보고되면서 이의 발생현황 및 처리효율에 대한 연구가 하·폐수처리장을 중심으로 수행되어 왔다. 처리공정 내의 미세플라스틱은 대부분 슬러지에 침전되어 제거되므로 적절한 관리가 필요하나 이와 관련한 국내 연구는 제한적이다. 본 연구에서는 공공하수처리장 및 공공폐수처리장을 대상으로 슬러지의 발생 및 처리현황과 관련 법률 조사 및 정책 동향 파악을 통해 미세플라스틱의 환경노출을 최소화할 수 있는 적절한 관리방안을 검토하였다. 슬러지 처리방법의 조사·분석 결과, 공공하수처리장 슬러지는 재활용 > 소각 > 매립 등 순으로 비율이 높게 나타났으며 이중 재활용은 연료화 > 건축소재 > 퇴비화 순으로 확인되었다. 공공폐수처리장의 경우는 재활용 > 연료화 > 매립 순으로 비율이 높게 나타났으며, 재활용은 소각 후 > 퇴비화 후 > 고형화 후 > 지렁이 사육 순으로 확인되었다. 미세플라스틱의 생태계 노출을 가중 시킬 수 있는 슬러지 처리방법은 매립 및 농업분야의 이용 용도로 판단되며, 해당 방법은 국내 매립장의 수용 용량 부족 현상과 화학비료 및 가축분뇨 비료 등의 충분한 공급 현황을 고려할 때 그 필요성이 낮아 보인다. 대신 신재생에너지 정책과 연계하여 연료화, 에너지화 이용 방안을 확대하고 이외 건축자재 부원료 등의 활용을 적극적으로 모색하는 것이 지속가능한 환경보전 측면에서 보다 합리적일 것으로 예상된다. 향후 동 계획의 실효성과 관련 법 개정을 위한 주요 기초 자료를 확보하기 위해서는 국내 슬러지 수요-공급 현황과 관리 계획의 환경적 영향 및 경제적 효과 등을 심도 있게 연구하는 과정이 필요할 것으로 판단된다.