• 한국상하수도협회지
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• s.5
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• pp.62-65
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• 2004

• 한국상하수도협회지
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• s.5
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• pp.66-75
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• 2004

• Water for future
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• v.47 no.5
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• pp.28-34
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• 2014

• Proceedings of the Membrane Society of Korea Conference
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• 1998.04a
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• pp.76-78
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• 1998

1. 서론 : 수처리공정에서의 막오염은 효과적인 공정운용을 위해 주요 문제로 인식되고 있으며 막오염은 막표면이나 세공에서 물질의 흡착, 부착 그리고 축적 등과 같은 일련의 메카니즘에 의해 투과율을 저하시키는 결과를 초래한다. 본 연구는 주기적인 역세척(frequency backpulsing)에 의한 중공사막에서의 오염 현상을 규명하여 정수 처리 공정에서 막오염을 최소화시키는 운전 조건을 확립하는 것을 목적으로 하고 있다.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1747-1748
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• 2008

정수처리시스템에서의 염소소독공정은 염소투입설비의 지연요소와 염소반응시간에 의한 지연요소 등으로 매우 큰 시지연특성을 갖는 대표적인 공정이다. 본 논문에서는 염소소독공정 중 후염소공정을 조사 분석하여 공정에 영향이 큰 파라메타를 선정하고 이를 통하여 각 파라메타간 상관관계를 분석함으로써, 시지연공정의 모델을 개발하였다.

• Journal of Life Science
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• v.19 no.3
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• pp.373-377
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• 2009

Poliovirus, coxsackievirus, and ecovirus isolates from environmental sources were compared with laboratory strains to determine their removal rate in the water treatment process. The recovery efficiencies of poliovirus, coxsackievirus and echovirus using positive strains ranged from $72{\sim}108%$. Regarding virus removal efficiency in water treatment of pilot-plants, about 99% of all of the viruses were removed in the sedimentation step and 100% of viruses were clearly removed through post-ozonation and BAC filteration. Using six cell lines tested viral sensitivity in cell line and showed different sensitivity as viruses. Polioviruses showed higher sensitivity in the BGMK cell line than other cells, and coxsackieviruses were detected in higher level in the BGMK and Vero cell lines. On the other hand, the RD cell line was useful in the isolation of ecoviruses.

• Proceedings of the Membrane Society of Korea Conference
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• 1999.04b
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• pp.13-24
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• 1999

폐수 재활용방법은 반도체업계나 도금, 기타 산업에서 주로 2차 세정수를 회수하여 저급수로 직접 사용하는 방법 또는 간단한 전처리를 거쳐 원수에 혼합하여 정수처리하는 RECLAM SYSTEM과 1차 세정폐수를 분리하여 전처리와 RO 등을 거쳐 용수로써 재활용하는 PROCESS RECYCLE SYSTEM, 종합 폐수처리 후 방류수를 재활용하는 방류수 재활용설비로 구분할 수 있다. 막분리를 사용한 폐수 재활용기술에서는 방류수 재활용(종합폐수 재활용)와 원폐수 재활용(성상변 분리 재활용)만을 다루고져 한다.

• Journal of Korean Society of Environmental Engineers
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• v.38 no.9
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• pp.482-496
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• 2016

Algal blooms of cyanobacteria (blue-green Algae) due to the eutrophication of rivers and lakes can cause not only the damage by its biological toxins but also the economic loss in drinking water treatment. The natural algae coagulant, a commercial product known as W.H. containing the algicidal and allelopathic material derived from oak, can control algal problems proactively through the coagulation flotation process. However, because there have been no applications of the process for pre-treatment in drinking water plants, we could find no report on the optimum injection dose of W.H.. In this study, we have conducted several sets of jar-tests while changing W.H. dose and concentration of chl-a for (1) Han-river samples and (2) subcultured cyanobacteria samples, and monitored the removal mechanisms of algae intensively. Based on these jar-test results, two linear equations with variables of chl-a and turbidity have been deduced to predict the optimal W.H. dose after the multiple regression analysis using IBM-SPSS. Also, prototypes of automatic control logic have been suggested to inject the optimal W.H. dose promptly in response to the variation of water quality.

• Membrane Journal
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• v.25 no.6
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• pp.503-514
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• 2015

In this study, water purification system without coagulant was consisted of F/A and membrane to produce purified water which only uses physical treatment without coagulant. Because the use of coagulant has a possibility remaining of hazardous aluminum with our health. Especially, the Filtralite was reviewed the possibility to remove turbidity and organic material. It was found that the turbidity removal rate of Filtralite was 83~84%. It show that Filtralite has similar efficiency to sand-filter. But Filtralite has higher 50% removal rate of organic material than sand-filter due to well-developed pore on the surface of it. So, Filtralite could be used to substitute the sand-filter for the F/A process due to higher removal rate. And also coupled with activated carbon in F/A process, TMP was increased by TOC value. To prevent increasing TMP, media that has outstanding organic adsorption ability should be used.

• Journal of Life Science
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• v.17 no.10
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• pp.1374-1380
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• 2007

The development of polymerase chain reaction (PCR) technology has the potential to solve for isolating pathogenic microorganisms from environmental samples than traditional plate counting methods. We have been detected pathogenic bacteria from raw water and water treatment process in Busan metropolitan city by PCR method. According to the result of survey from July 2004 to October 2005, 80 out of 92(87.0%) were positive for bacterial pathogens in raw water samples and positive rate of Shigella spp., Yersinia spp., Salmonella spp. and Legionella spp. were 46.2%, 40.7%, 17.6% and 9.9%, respectively. Pathogenic bacteria in raw water was mainly distributed through the lately Autumn to the winter and more highly detected Maeri than Mulgum region. During the period of survey in water treatment process, Shigella spp. was highly detected but all of bacterial pathogens were entirely removed after in post-ozonation step. These suggest that waters supplied in Busan metropolitan city may be safe against the pathogenic bacteria.