• Title, Summary, Keyword: sewage treatment

Search Result 1,096, Processing Time 0.046 seconds

A Study on Efficient Improvement Methods of Performance Testing in the Individual Sewage Treatment System (개인하수처리시설 성능검사의 효율적 개선방안 연구)

  • Cho, Yong-Hyun;Kim, Yun-Eun;Kim, Hee-Young
    • Journal of Korean Society of Water Science and Technology
    • /
    • v.25 no.3
    • /
    • pp.99-108
    • /
    • 2017
  • In the sewage treatment system, it is provided that the sewage within the sewage treatment zone around the major city should be treated in the public sewage treatment system through the sewage pipe line or outside of sewage treatment zone, the sewage and the excrements should be treated by installing the individual sewage treatment facilities or the septic tank at the origin. Since the individual sewage treatment facilities works as the domestic non-point pollution source, the management and improvement measure of individual sewage treatment system is required. However, in case of individual sewage treatment facilities, as its importance is underestimated compared with the public sewage treatment facilities, its operation and management are not made systematically. In this study, the problems and the improvement direction of the individual sewage management were studied through the investigation of institutional part of the individual sewage treatment facilities. In the results of research, it was shown that the public sewage treatment facilities or performance test laboratory(testbed) should be prepared by introducing the performance test system according to the changes in the constant temperature and the load. And performing the performance test in the performance test laboratory having temperature control device should be examined. In addition, to prevent the arbitrary manipulation (adjustment of inflow, adjustment of concentration, injection of chemicals, modification of facilities, etc) of the subject sewage treatment facilities, the measure that the performance test applicant should install the test facilities at independent performance test facilities and then, the performance test should be conducted by restricting the access of related personnel should be examined.

The System Improvement of the Individual Sewage Treatment System (개인하수처리시설의 제도개선에 관한 연구)

  • Jang, Hyo-Ju;Lee, Jang-Hown;Kang, Seon-Hong
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.24 no.1
    • /
    • pp.33-40
    • /
    • 2010
  • Individual sewage treatment system is classified into a sewage treatment system which treats all the domestic sewage and a water-purifier tank which treats only effluent flushing from the toilet. The number of registered manufacturers has increased rapidly since 2001. As a result, price competition has increased among the manufacturers and has caused the problems such as the inappropriate production of individual sewage treatment system, the unreasonable permit for building completion and the shortage of the professional technology of the community's public officials in charge. This study collected the problem cases that are related with existing individual sewage treatment system and operation. Efficient improvement plan for the stable supply, installation, maintenance of individual sewage treatment system were suggested.

A Study on Efficient Operation Management of Small-Scale Sewage Treatment Plants in Gyeongnam (경남지역 소규모하수처리시설의 효율적 운전관리방안 연구)

  • Park, Sung-Hwan;Moon, Sung-Yong
    • Journal of Korean Society of Water Science and Technology
    • /
    • v.25 no.2
    • /
    • pp.15-27
    • /
    • 2017
  • In this study, It is to identify matter through the analysis of small-scale sewage treatment plant operations in Gyeongsangnam-do and relatively weak state facilities in winter. And It is suggested to appropriate management method at sewage treatment facilities. First, small scale sewage treatment plant treatment method is very divers. The selection of treatment method has not been made by appropriate standard. second, there are many problems that have been raised consistently such as inappropriate facilities operating ratio, sewage inflow of low concentration(less than BOD 100mg/L), inflow sewage low temperature(in winter) and inflow unknown water by uninstalled joints. Third, 12 facilities small-scale sewage treatment facilities the excess of effluent total nitrogen water quality standards(enhanced water quality in winter). Therefore, this study suggested that nitrogen and phosphate treatment efficiency improves when unification of sewage system, sealing of treatment facilities, maintenance of sewage treatment facilities pipeline and installed advanced process like total phosphate facilities.

Study on Energy Independence Plan for Sewage Treatment Plant (하수처리시설의 에너지 자립화 방안 연구)

  • Kim, Young-Jun;Chung, Chul-Kwon;Kang, Yong-Tae
    • Proceedings of the SAREK Conference
    • /
    • /
    • pp.15-20
    • /
    • 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.

  • PDF

Study on the Operation and Status of Private Sewage Treatment Facilities (개인하수처리시설 운영 및 실태 연구)

  • Lee, Jang-Hown;SHIN, Hyun-Gon
    • Journal of the Korea Organic Resources Recycling Association
    • /
    • v.28 no.2
    • /
    • pp.31-40
    • /
    • 2020
  • As private sewage treatment facilities in Korea are constantly concerned about the distribution and poor construction of defective products, minimum standards for each unit process applicable to the planning and design of sewage treatment facilities are deemed necessary. The problems and requirements of the analysis results of the operation status discussed in this study are as follows. 1) Strengthening education of supervisor of private sewage treatment facility. 2) Poor operation and management of Sewage treatment facilities. 3) A mandatory review of sewage treatment facilities for less than 2 ㎥/day of facilities other than sewage treatment zones. 4) Necessity of management of sewage treatment facility in feedstocks. 5) As a result of the technical review, Improvement plans for Ineligible facility are needed. It is also necessary to prepare a guidebook for design construction and maintenance by investigating and analyzing guidelines and data related to domestic and foreign private sewage treatment facilities.

Effects of Gumi City Sewage Treatment Effluent in the Downstream Nutrient Matter: Comparison of Daily Loading (구미시 하수처리 방류수가 하류 하천 영양염류에 미치는 영향: 부하량 비교)

  • Seong, Jin-Uk;Lee, Sang-Pal;Lee, Jae-Kyun;Park, Je-Chul
    • Journal of Environmental Science International
    • /
    • v.22 no.12
    • /
    • pp.1643-1650
    • /
    • 2013
  • This study investigated water quality of effluents and stream from the sewage treatment plants located at Gumi Complex 4, Gumi, and Wonpyeong in Gumi. Downstream region was found to increase the concentration of nutrients for sewage treatment plant effluent. Both phosphorus and nitrogen were accounted most as soluble form. In particular, the high ratio of dissolved effluent of sewage treatment plants were investigated. In the streams, Phosphorus concentration was high during rainy season and nitrogen concentration was high in the dry season. Sewage treatment plant effluent was relatively less microbial activity and nutrient concentrations were higher in the winter. TN/TP ratio was the highest in the upstream region and the lowest in the sewage treatment plant effluent. The effect of the nutrient matter from a discharge of a sewage treatment plant on rivers varied depending on the size of the river and the treatment plant. However, the influence of the concentration was greater than that of flowrate. Sewage treatment plant effluent loads phosphorus, nitrogen accounted for 8% and 6% respectively at the point N3 of the Nakdong river.

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

  • Song, Minsu;Kim, Hyoungho;Bae, Hyokwan
    • Journal of Korean Society on Water Environment
    • /
    • v.36 no.1
    • /
    • pp.55-68
    • /
    • 2020
  • 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.

The Case Studies of Artificial Intelligence Technology for apply at The Sewage Treatment Plant (국내 하수처리시설에 인공지능기술 적용을 위한 사례 연구)

  • Kim, Taewoo;Lee, Hosik
    • Journal of Korean Society on Water Environment
    • /
    • v.35 no.4
    • /
    • pp.370-378
    • /
    • 2019
  • In the recent years, various studies have presented stable and economic methods for increased regulations and compliance in sewage treatment plants. In some sewage treatment plants, the effluent concentration exceeded the regulations, or the effluent concentration was manipulated. This indicates that the process is currently inefficient to operate and control sewage treatment plants. The operation and control method of sewage treatment plant is mathematically dealing with a physical and chemical mechanism for the anticipated situation during operation. In addition, there are some limitations, such as situations that are different from the actual sewage treatment plant. Therefore, it is necessary to find a more stable and economical way to enhance the operational and control method. AI (Artificial Intelligence) technology is selected among various methods. There are very few cases of applying and utilizing AI technology in domestic sewage treatment plants. In addition, it failed to define specific definitions of applying AI technologies. The purpose of this study is to present the application of AI technology to domestic sewage treatment plants by comparing and analyzing various cases. This study presented the AI technology algorithm system, verification method, data collection, energy and operating costs as methods of applying AI technology.

A Study on the applications of flow control methods in sewage treatment process system (하수처리 공정시스템에서 유량제어기법의 활용에 관한 연구)

  • Jeong, Seong-Yun;Kang, Seon-Hong
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.30 no.5
    • /
    • pp.597-604
    • /
    • 2016
  • This study was begun with the object of actively reflection the rapid technological advancements of the electronical control and mechanical control industries to sewage disposal methods. Or focuses on applying a flow control method that utilizes inverters and automatic valves to sewage treatment process systems. This study proposes that sewage treatment process systems architects must acquire a certain degree of technical skills in the areas of electrical and mechanical controls in order to raise the standard of completeness of sewage treatment process systems. And further emphasizes that there is required continuous research on automatics valves that are used in sewage treatment.

Application of Sewage Treatment Processes to a System Design for Water Resource Production 1. Analysis and Assessment of Sewage Treatment Process Efficiency (하수처리공정의 물 자원 생산 시스템 설계에 대한 적용 1. 하수처리공정의 처리효율 분석 및 평가)

  • Shin, Choon Hwan
    • Journal of Environmental Science International
    • /
    • v.25 no.8
    • /
    • pp.1155-1163
    • /
    • 2016
  • The treatment efficiencies of domestic sewage treatment processes were analysed and assessed to suggest and design a suitable technology for coal seam gas (CSG) water treatment. Two sewage treatment plants (S and G in Busan) were selected. The former operates with standard activated sludge and modified Ludzak Ettinger processes while the later uses the combination of $A_2/O$ and gravity fiber filtration. For both plants, the concentrations of BOD, $COD_{Mn}$, T-N and T-P were about 5.0, 19.0, 5.0, 11.0 and 1.0 ppm, respectively, which satisfy the discharge standards. Therefore, although sewage treatment processes seems to be applicable for CSG water treatment, additional processes to remove total dissolved solids and ionic compounds (i.e. bicarbonate) need to be introduced to produce fit-for-purpose water resources for beneficial use (in accordance with Water ACT 2013). This, for the CSG treatment process design, it is necessary to align the operating conditions with merging methods of combinable unit technology obtained from sewage treatment processes.