• 상하수도학회지
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• 제25권6호
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• pp.935-947
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• 2011

In the era of climate change, the feasibility of a 'multi-functional storage facility' was evaluated in terms of various key performance indices such as flooding prevention effects, urban pollution reduction effects, and rainwater harvesting effects. As a result, the Korea Ministry of Environment introduced a new concept of 'multi-functional storage facility' for sewer flooding prevention and urban non-point pollution reduction. Prior to introducing these infrastructure (a large underground storage facility), the more details were needed to be examined carefully in all of technical aspects of construction and management. It was also well known that the validity of installation of 'multi-functional storage facility' was sometimes weakened because of a low B/C ratio.

• 한국항해항만학회지
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• 제28권3호
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• pp.259-268
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• 2004

지난 몇 년 동안, 해안지역에서 산업의 발달과 인구증가로 인해서 육지에서 방출되는 오폐수의 정화 처리 방법이 중요한 문제점으로 지적되고 있다. 처리방법으로는, 1차 처리 또는 2차 처리된 것을 수중 방류관을 통해 해안이나 심해 또는, 그 중간지점에서 방출되는데, 오폐수가 방출되면 주변의 해수를 연행하여 플룸, 제트 또는 부양성 제트의 형태로 해수면까지 상승하면서 많이 희석된다. 본 연구는 해양환경관리 및 오폐수 처리에 관한 의사결정과정에서 중요한 해양방류관 설계를 다룬다. Cormix 모델에 조위의 변화와 계절변화에 의한 몇가지 요소를 고려하여 방류수의 궤적과 희석을 다룬다. 본 연구는 방류수의 효과석인 관리를 위한 기본 데이터와 일반배치에 매우 유용하게 활용될 것이다.

• 상하수도학회지
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• 제32권6호
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• pp.507-515
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• 2018

The results of the survey on water utilization status, the wasted water factor, the awareness, and the education and promotional activities of water saving in Daejeon City are as follows: The percentage of using tap valve with a closure was 66% when showering. 74% of water was used with closing the tap valve when washing faces with no water needed, it was still considered that there existed a wasting water. The most wasting reasons of water were found to be shower, bath, and laundry in order. In the awareness of practicing tap water saving, 9.1% of respondents acted actively, 53.4% of them were trying to practice it, and more than 63% had a positive awareness. In the contents of practicing saving water, locking water when soaping while showering, non-laundry of small quantity, and using cups when brushing teeth were top priorities. About 50% of the reasons for saving water was to practice purely saving water, when saving for economic help was excluded. The level of water saving awareness was not high when considering that the ratio of usage without water saving equipment and installation, and using method was relatively high when moving in. In order to make usage of water saving equipment more common, it was deemed necessary to provide information on the purchase of water saving equipment and to promote and educate the efficiency of saving of related products. More than about 90% of the respondents responded that water saving education or promotional activities had an effect of improving water saving awareness. The most effective method of education and promotional activities was found to be 40.4% by mass media activities, and 21.7% by promotions through mobile devices.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2002년도 학술발표회 발표논문집
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• pp.137-140
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• 2002

The monitoring system for integrated management of on-site wastewater treatment plants(biofilter) was designed and its operation program was developed. In design process, the research on monitoring parameters which will be able to represent condition and operation of the pilot plants was accomplished, and these parameters came to reveal with ORP(Oxidation-Reduction Potential), water level, pump and power on/off. Proposed monitoring system is composed with measurement, control, communication and display device, and PCB(Prototype Circuit Boards) and microcontroller (PIC16F877) technique are applied to its design of control device for performing specific function. also, The operation program of PC setup is developed in order to provide a convenience to the manager.

• 한국물환경학회지
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• 제39권1호
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• pp.76-86
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• 2023

We are on the verge of paradigm shift for the design and operation of our urban water systems from treatment- and efficiency-based to recirculation- and sustainability-based. One of the most frequently suggested alternatives to embody this paradigm shift is to decentralize the currently highly centralized urban water infrastructure. However, claims for water infrastructure decentralization are often criticized due to poor economic feasibility, unstable performance, and unprofessional operation and maintenance. The current study critically reviews the literature to discuss the technical advancement needs to overcome such challenges. Firstly, decentralized water infrastructure was briefly defined and the rationale for the proposal of its introduction to the next-generation urban water systems was laid down. The main discussion focused on the following water technologies, which require special attention when working with decentralized water infrastructure: i) material collection, storage, and transport; ii) easily scalable water treatment; iii) sensor, information, and communications; and iv) system optimization. The principles, current development status, and challenges were discussed for each of the water technologies. The discussion on the water technologies has enabled the identification of future research needs for their application to the next-generation urban water systems which will be designed following decentralized water infrastructure. This paper will significantly improve the current understanding on water infrastructure decentralization and provides insight on future direction of water technology development.

• 상하수도학회지
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• 제29권1호
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• pp.123-131
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• 2015

A CCTV inspection method has been widely used to assess sewer condition and performance, but Korea lacks a proper decision support system for prioritizing sewer repair and rehabilitation (R&R). The objective of this paper is to introduce the results that we have developed in the Sewer Condition Assessment and Rehabilitation Decision-making (SCARD) Program using MS-EXCEL. The SCARD-Program is based on a standardized defect score for sewer structural and hydraulic assessment. Priorities are ranked based on risk scores, which are calculated by multiplying the sewer severity scores by the environmental impacts. This program is composed of three parts, which are decision-making for sewer condition and performance assessment, decision-making for sewer R&R priority assessment, and decision-making for optimal budget allocation. The SCARD-Program is useful for decision-makers, as it enables them to assess the sewer condition and to prioritize sewer R&R within the limited annual budget. In the future, this program logic will applied to the GIS-based sewer asset management system in local governments.

• 상하수도학회지
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• 제27권1호
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• pp.91-99
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• 2013

In this study, a current condition of human feces-collecting and transporting business of local government was investigated using statistical data to efficiently derive proper systematic management plan for human feces-collecting and transporting business. According to the data for human feces-collecting and transporting business from 2006 to 2010, it turned out that the number of people working in this field and the amount of human feces produced and processed were decreased. They were decreased by 292 places, 1,077 employees, $904m^3/day$, and $121m^3/day$, respectively. In addition, the number of human feces-collecting and transporting business has been decreased causing an extra amount of manpower and the number of employees working in the field decreased. In this study, the reasons for financial difficulties of human feces-collecting and transporting business were analyzed. Finally the alternative plans were suggested to replace currently closed business due to management deterioration.

• 상하수도학회지
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• 제37권5호
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• pp.281-288
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• 2023

This study was performed to evaluate the pollutants removal characteristics of two types of RBFs(Riverbank filtration, Riverbed filtration) intake facilities installed in Nakdong River and in Hwang River respectively. The capacity of each RBF is 45,000 m³/d for riverbank filtration intake facility and 3,500 m³/d for riverbed filtration intake facility. According to data collected in the riverbank filtration site, removal rate of each pollutant was about BOD(Biochemical Oxygen Demand) 52%, TOC(Total Organic Carbon) 57%, SS(Suspended Solids) 44%, Total coliforms 99% correspondingly. Furthermore, Microcystins(-LR,-YR,-RR) were not found in riverbank filtered water compared to surface water in Nakdong River. DOC(Dissolved Organic Carbon) and Humics which are precursors of disinfection byproduct were also reported to be removed about 59% for DOC, 65% for Humics. Based on data analysis in riverbed filtration site in Hwang River, removal rate of each contaminant reaches to BOD 33.3%, TOC 38.5%, SS 38.9%, DOC 22.2%, UV254 21.2%, Total coliforms 73.8% respectively. Additionally, microplastics were also inspected that there was no obvious removal rate in riverbed filtered water compared to surface water in Hwang River.

• 대한환경공학회지
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• 제32권12호
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• pp.1069-1075
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• 2010

• 한국습지학회지
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• 제11권1호
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• pp.75-82
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• 2009

기존의 하천 수질을 규제하던 농도규제방식은 오염부하의 양적증가를 통제할 수 없어 수질개선에 한계성을 지니고 있었다. 수질오염총량관리제도는 폐수 중 오염물질의 총량을 규제하여 환경기준을 달성할 수 있는 허용부하량 이내로 배출 오염물질의 총량을 할당, 규제할 수 있다. 수질오염총량관리제도의 하수발생량 산출시 실측한 값을 사용하지 않고 오염원별 발생원단위를 곱하여 산출하여 실측한 data를 이용한 산출값과 차이가 있다. 수질오염총량관리에 의한 산출결과를 보면 건기시 관거유입량 $26,460.9m^3$/d, 관거이송유량 $17,778.6m^3$/d로 실측한 data를 이용하여 산출한 관거유입량 $17,106.1m^3$/d, 관거이송유량 $19,033.9m^3$/d로 차이가 났으며, 우기시의 경우 수질오염총량관리에 의한 관거유입량 $49,512.2m^3$/d, 관거이송유량 $18,628.7m^3$/d로 실측한 data를 이용하여 산출한 관거유입량 $30,918.2m^3$/d, 관거이송유량 $19,700.7m^3$/d로 차이가 났다. 오염 부하량의 기초값인 하수발생량이 실측한 하수발생량과 차이를 보여 효율적인 제도 수행에 문제점이 있는 것으로 판단된다.