[논문]에너지 생산형 하수처리장을 위한 가용 기술과 통합관리 방안

송민수; 김형호; 배효관

doi:10.15681/kswe.2020.36.1.55

에너지 생산형 하수처리장을 위한 가용 기술과 통합관리 방안
Available Technology and Integrated Management Plan for Energy-positive in the Sewage Treatment Plant 원문보기

한국물환경학회지 = Journal of Korean Society on Water Environment, v.36 no.1, 2020년, pp.55 - 68

송민수 (부산대학교 사회환경시스템공학과) , 김형호 (부산환경공단) , 배효관 (부산대학교 사회환경시스템공학과)

Abstract ▼ AI-Helper

Because of the intensified environmental problems such as climate change and resource depletion, sewage treatment technology focused on energy management has recently attracted attention. The conversion of primary sludge from the primary sedimentation tank and excessive sludge from the secondary sedimentation tank into biogas is the key to energy-positive sewage treatment. In particular, the primary sedimentation tanks recover enriched biodegradable organic matter and anaerobic digestion process produces methane from the organic wastes for energy production. Such technologies for minimizing oxygen demand are leading the innovation regarding sewage treatment plants. However, sewage treatment facilities in Korea lack core technology and operational know-how. Actually, the energy potential of sewage is higher than sewage treatment energy consumption in the sewage treatment, but current processes are not adequately efficient in energy recovery. To improve this, it is possible to apply chemically enhanced primary treatment (CEPT), high-rate activated sludge (HRAS), and anaerobic membrane bioreactor (AnMBR) to the primary sedimentation tank. To maximize the methane production of sewage treatment plants, organic wastes such as food waste and livestock manure can be digested. Additionally, mechanical pretreatment, thermal hydrolysis, and chemical pretreatment would enhance the methane conversion of organic waste. Power generation systems based on internal combustion engines are susceptible to heat source losses, requiring breakthrough energy conversion systems such as fuel cells. To realize the energy positive sewage treatment plant, primary organic matter recovery from sewage, biogas pretreatment, and co-digestion should be optimized in the energy management system based on the knowledge-based operation.

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표/그림 (13)

그림 Fig. 1. Schematic flow of energy positive sewage treatment.
표 Table 1. Energy content of wastewater
표 Table 2. Domestic sewage treatment plant energy consumption in 2016
그림 Fig. 2. Steps of organics degradation in anaerobic digestion.
표 Table 3. Theoretical yield comparison of substrate components in anaerobic digestion
표 Table 4. Operational conditions of full-scale CEPT plants
표 Table 5. Full-scale wastewater treatment plants using AB plants in Germany
표 Table 6. Operational conditions of AB process in Netherlands
표 Table 7. Operational conditions of biological organic recovery process treating synthetic wastewater.
표 Table 8. Data on the inhibitory concentration of ammonia
표 Table 9. Efficiency of oxidation pretreatment
그림 Fig. 3. Energy management system model.
표 Table 10. Biogas production case of domestic wastewater treatment plant

질의응답

핵심어	질문	논문에서 추출한 답변
	하수도란?	하수도는 인간 생활에서 사용된 하수와 분뇨, 우수를 처리하기 위해 설치되는 하수관로, 공공 하수처리시설, 하수저류 시설 등을 지칭한다. 하수도가 도입되어 우수를 배제하고 방류 분뇨를 처리하면서 인간은 수인성 질병의 근원을 예방하 고 인간다운 삶을 영위할 수 있게 되었다.
	우리나라는 1966년 하수도법이 제정되어 단기간에 하수도의 발전을 이루어 내었지만 아직 미흡한 부분은?	2 %에 이른다(ME, 2018a). 그러나 종래의 하수도 사업은 시설 확충과 처리 효율을 높이기 위한 기술 도입에 집중하였으며 에너지 효율성에 대한 고려는 미흡하였다. 현재는 지구 온난화로 인한 기후변화, 자원 고갈 등 환경문제가 가속화되면서 국가적 측면에서의 에너지 대책 마련이 이슈로 제기되고 있는 상황이다.
	하수도가 도입되어 생긴 장점은?	하수도는 인간 생활에서 사용된 하수와 분뇨, 우수를 처리하기 위해 설치되는 하수관로, 공공 하수처리시설, 하수저류 시설 등을 지칭한다. 하수도가 도입되어 우수를 배제하고 방류 분뇨를 처리하면서 인간은 수인성 질병의 근원을 예방하 고 인간다운 삶을 영위할 수 있게 되었다. 우리나라는 1966년 하수도법이 제정되어 단기간에 하수도의 발전을 이루어 내었 다.

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