• 수도
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• s.61
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• pp.31-50
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• 1993

• 수도
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• s.23
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• pp.9-15
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• 1980

• Proceedings of the Membrane Society of Korea Conference
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• 1997.04b
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• pp.40-42
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• 1997

수처리 공정의 목적은 원수 중에 포함된 콜로이드, 미립자 등의 현탁물질, 이온과 유기물 등의 용해성 물질의 제거로, 이러한 목적을 위해서 수처리공정에 막분리 기술을 이용하는데 관심이 높아지고 있고, 이미 일부에서는 실용화되었다. 분리막에는 분리막의 기공의 크기에 따라 역삼투막, 한외여과막, 정밀여과막이 있으며, 대상 폐수 및 처리수의 재활용 여부에 따라 선정하여 사용한다. 본 연구에서는 폴리설폰 재질의 중공사하여 한외여과막을 사용하여 하천수를 처리하여 투과수와 원수의 수질을 비교함으로써, 분리막 기술에 의한 하천수처리의 타당성 및 처리 효율을 고찰해 보고자 하였다. 대상 원수로 최근 생활하수의 유입으로 수질이 악화되고 있는 소양강의 한 지류인 공지천의 물을 사용하였다.

• Proceedings of the Korea Water Resources Association Conference
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• 2004.02a
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• pp.113-197
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• 2004

우리나라에서는 수질개선을 위하여 하수처리분야에 1993년부터 1997년까지 총 7조 7,705억원을 투자하였으며, 방류수 수질기준 강화 측면에서는 1996년 1월 1일부터 총인(T-P)과 총질소(T-N)의 방류수 수질기준을 수질환경보전법에 명시하여 규제하기 시작하여, 2008년 1월 1일부터 BOD 및 SS 10mg/L, T-N 20mg/L, T-P 2mg/L로 전국적으로 강화할 계획이다. 그러나, 수질개선을 위한 투자액 중 서울 등 대도시의 하수처리시설이나 하수관거 투자액이 절대적으로 많은 부분을 차지하고 있으므로, 상수원수의 뚜렷한 개선효과는 미미한 실정이다. (중략)

• Journal of Bio-Environment Control
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• v.5 no.2
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• pp.131-137
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• 1996

This analysis has been conducted to get some basic data of the composition of culture solution mostly in inorganic ions, and water quality in hydroponic farms in Chollabuk - do. pH range was shown from 6.00 to 7.65 and the average was 6.58. EC range was shown from 0.01 to 0.94 mS/cm and the average was 0.28 mS/cm. Na concentration ranged from 4.71 to 145.44 ppm and Cl concentration ranged from 0 to 171.80 ppm were shown and their average were 24.24 ppm and 26.33 ppm, respectively. Na and Cl concentrations were higher as 7.7%, compared to those of other farms, which could cause the salt accumulation in the substrate mats. K, Ca and Mg concentrations were ranged from 0.93 to 17.38 ppm, 2.29 to 34.30 ppm and 0.70 to 18.61 ppm, respectively. Average concentrations were 3.06 ppm in K, 13.00 ppm in Ca and 4.91 ppm in Mg. 50, and PO$_4$ concentration ranged from 0.63 to 59.79 ppm and 0 to 4.28 ppm were shown and their average were 18.11 and 0.51 ppm. Cu concentration was ranged from 0 to 0.32 ppm and 0 to 6.22 ppm in Zn concentration. Their average were 0.02 ppm and 0.52ppm, respectively.

• Journal of the Korean Society for Environmental Technology
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• v.19 no.6
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• pp.543-549
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• 2018

In this study, the treatment efficiency of inorganic membrane according to the flux that blending raw water was investigated at the laboratory level. Based on the results of each blending and flux, we obtained the best efficiency according to each measurement item. The treatment efficiencies were different depending on the raw water and treatment amount of the treated water. Especially, turbidity removal efficiency was high. In the case of $UV_{254}$, the removal efficiency according to the concentration of the raw water and the removal efficiency according to the flux of the treated water showed a maximum of 69 % to minimum of 48 %. In the case of TOC and DOC, the processing efficiency was 22 % and 28 %, respectively, because the organic value of the raw water was low. These results suggest that there is an optimal process to effectively remove contaminants from the inorganic membrane process, and it is necessary to optimize it according to operating conditions.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.29 no.5B
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• pp.419-427
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• 2009

In existing studies about benefit of water quality improvement using WTP, the object of survey is described pre-policy water quality as "current water quality" and improved (post-policy) water quality as "boatable, fishable and swimmable". Multiply WTP by the number of households of basin is total benefit. The existing studies are not benefit of a specific water resource business but benefit of a policy on unsubstantial water resource business. Because of a lack of objectivity and oversimplification, it is difficult for survey respondents to understand an object of survey. The purpose of this study is to evaluate a benefit estimation methodology for raw water quality improvement in water resource development business. After conducting a survey of WTP of 1,000 housewives who is using water service in the National Capital region, the relational expression of water quality improvement (BOD) and WTP is derived by using statistical analysis of the survey. As a case study, the stream water quality improvement benefit of Song Li Won multipurpose dam was evaluated, which is planned to be built at the local secondary stream section on Nae Sung stream in Nak-Dong River system. As a result of study, annual average benefit evaluation is 5,980 million won on the average annual planned discharge, 8,663 million won on the planned discharge during the period except for wet season (July to October), 11,905 million won on the planned discharge during water quality declining period and 14,502 million won on the planned discharge during water quality declining period respectively. By using the relational expression of BOD-WTP, it is easy to estimate the benefit without regard for water quality.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2003.05a
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• pp.194-197
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• 2003

• Journal of Korea Water Resources Association
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• v.33 no.S1
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• pp.855-860
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• 2000

• 한국상하수도협회지
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• s.6
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• pp.96-100
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• 2004