• Title/Summary/Keyword: By-Pass Sewer

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A by-pass rainwater penetration sewer system for urban flooding mitigation (도시침수 저감을 위한 by-pass 빗물침투성 우수관거)

  • Lee, Bum-Sub;Ko, Keon-Ho;Kang, Ho-Yeong;Moon, Young-Il
    • Journal of Korea Water Resources Association
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    • v.49 no.9
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    • pp.799-807
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    • 2016
  • The aim of this study is to determine and propose the by-pass rainwater sewer system in order to reduce the urban floodplain from the locality heavy rain every year during the dry season and the sinkholes in the city as well as the shortage of groundwaters due to extreme hot weather condition and urban heat island phenomenon. Heavy rain occurs more than the years of heavy rainfall probability, comparison between the place where uses the existing pipes and connect the sewer system with by-pass rain permeability and without expanding sewer pipe replacement at intersection of Gangnam station 3.07 ha at Gangnam-gu, Seoul Metropolitan area, it indicates that average of 27 million KRW (44%) maintenance cost savings and maintain existing sewer system without any other countermeasures. For the city flooded reduction, by-pass rainwater permeable rainwater pipe multiplying the probability the number of years during summer season and increase the water flow capacity during spring and fall when a small amount of rain that, it also contribute to the total amount of underground water secured through the by-pass penetration.

A Study on the Automatic Inspection of Sewer Facility Map (하수도시설물도 자동 검수 방안 연구)

  • Kim, Chang-Hwan;Ohk, Won-Soo;Yoo, Jae-Yong
    • Journal of the Korean Association of Geographic Information Studies
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    • v.9 no.2
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    • pp.67-78
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    • 2006
  • Local governments began to construct geographic information system to improve government productivity and performance. In support, central government organized a national commission for GIS. The master plan by NGIS has been the base for local government to participate in the construction of GIS at the local level in the under ground facilities management including water and sewers. The challenge faced by sewer facility managers includes controlling 'data accuracy'. The input for sewer data handling for efficient performance in local government requires accurate data. However data manipulation to get the 'good quality' data can be burdensome. Thus, the aim of this research is to provide the appropriate tool to guarantee the high quality of digital data in sewer facility management. It is helpful to pass the data examination by government as well as to insure confidence of decision and data analysis works in local government. In this research, error types of sewer data were classified and pointed the limitation of traditional examination methods. Thus this research suggested more improved method for finding and correcting errors in data input using sewer volume analysis and prediction model as immigrating sewer facility management work to Geographic Information System.

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Finding the operation conditions to minimize nitrous oxide emission from MLE configuration wastewater treatment plant using computer simulation program (컴퓨터 시뮬레이션을 이용한 MLE 공법 하수처리장에서 최저 아산화질소 발생 운전 조건 파악)

  • Jisoo Han;Mincheol Kim;Byonghi Lee
    • Journal of the Korea Organic Resources Recycling Association
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    • v.31 no.2
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    • pp.19-38
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    • 2023
  • Nitrous oxide, one of the six greenhouse gases from Kyoto protocol, is known to be emitted in biological nitrification and denitrification reactions at wastewater treatment plant. In this study, EQPS which is a computer program that can simulate nitrous oxide gas emission amount at wastewater treatment plants is used. The MLE process which treats wastewater from combined sewer is studied. Operational variables which are MLR, water temperature at reactor and primary clarifier by-pass percentage are changed to define the condition which produces the least amount of nitrous oxide gas. 200 % of MLR, 20 ℃ of water temperature at bioreactor and 15 % of primary clarifier by-pass percentage are shown the least nitrous oxide emission factor. Also, it is found that the deep aeration tank produces less amount of nitrous oxide gas since less air is required to meet oxygen demand in this type of aeration tank.

A Study on Water Quality Impact by Pollution Source in Yongwon Channel, Busan Newport (부산신항 용원수로에서의 오염원별 수질영향 조사)

  • Kwon, Jae Hyun;Kim, Young Do;Jung, Jae Hoon;Jeong, Weon Mu
    • Journal of Korean Society of Water and Wastewater
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    • v.27 no.2
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    • pp.185-196
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    • 2013
  • In Yongwon channel, its natural flow of seawater is blocked by the construction of Busan Newport including the container berth. The channel was transformed into a narrow and long one, where it is possible that ships are only allowed to pass through the north-side channel of Gyeonmado located at the point of river mouth to Songjeongcheon. In addition, Yongwon channel is approximately 100 m wide on average and 3,600 m long, which has the highest slenderness ratio (length/width=36). So it is considered that the changes in the terrain characteristics of Yongwon channel is likely to alter the circulation of sea water, thereby changing its water quality. In this study, the seasonal change and the spatial variation of the water quality in Yongwon channel was analyzed for the effect of land pollution using the measurement data. The mass balance calculation method is used to analyze the water pollution resulting from sediment pollutants. This result shows that the improvement of the water quality in Yongwon channel can be obtained from the sewer pipe modification and the environmental dredging.

The Implementation of EJB Based Goods Purchase System on the Commercial Contents (상품 콘텐츠에 따른 EJB 기반의 물품 구매 시스템 구현)

  • 정화영
    • The Journal of the Korea Contents Association
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    • v.3 no.1
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    • pp.39-46
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    • 2003
  • Electronic commerce part is changing rapidly for more efficient service support according to customer's inclination and request which pass over the time and space. That is, It was considered in customer's side that process and management of content by various articles, and component base development was considered in side of developer and administrator to operate this effectively. So, electronic commerce system need component based development that can be coped with efficient and active it and goods contents management to customers various inclination. Thus, in this research we implemented goods purchase system based on EJB(Enterprise Java Beans) of sewer side component mode. That is, each function part from goods contents to purchase is implemented to component which is independent execution module. Accordingly, component which is independence function part can cope actively in process of contents that change variously.

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