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조형락,정정우,손진식,이상호,채수권 한국막학회 2014 멤브레인 Vol.24 No.1
지붕이나 여러 가지 방법과 장소에서 수집된 빗물을 처리하면 직접적 간접적으로 유익하게 사용될 수 있다. 이러한 빗물은 점점 더 높은 품질을 위해 고려되고 있고, 분리막은 이러한 빗물 처리를 위한 중요한 기술이다. 특히, 분리막은 고품질 물 생산, 높은 집적도 및 낮은 에너지 소비 등의 장점이 있다. 그럼에도 불구하고, 막오염은 수처리 및 폐수 재활용 부분과 마찬가지로 심각한 문제로 간주되고 있다. 본 연구에서는 빗물 처리에 정밀여과(MF)막을 적용하였고, 저압 자외선(LPUV)처리를 정밀여과막의 전처리로 사용하였다. 유기물에 대한 UV의 영향을 정량화하기 위해 총 유기탄소(TOC) 및 UV 흡광도(UVA)를 모두 측정하였다. 또한 UV 전처리 효과에 따른 막의 오염 정도를 조사하였다. LPUV 전처리를 하고 실험을 한 결과 조류에 의해 오염된 빗물에서 막의 오염을 제어하는데 효과적임을 알 수 있었으며, 이것은 UV 처리 후 유기물의 양이 감소하고 특성이 변화하기 때문이었다. 따라서 UV/MF 처리는 마이크로 워터 그리드 시스템과 같은 수처리를 위한 유망한 옵션이 될 수 있을 것으로 생각된다. Rainwater harvesting is a process by which rainwater collected from rooftop or other catchment is purified so that the water can be directly or indirectly used by human beings for beneficial uses. As rainwater is increasingly considered for high quality purposes, membranes have gained an important place in rainwater treatment. It has advantages such as the production of high quality water, small footprint, and affordable energy consumption. Nevertheless, membrane fouling is re-garded as a serious problem similar to the cases of water treatment and wastewater reclamation. In this study, we applied microfiltration (MF) membranes for rainwater treatment. In addition, a low pressure ultraviolet (UV) process was also use as a pretreatment to control notonly. To quantify the effect of UV on organic matters, both total organic carbon (TOC) and UV absorbance (UVA) were measured. Moreover, the effect of UV pretreatment on membrane fouling was investigated. Experimental results indicated that the pretreatment of membranes using LPUV was effective to control fouling of MF mem-branes only when the rainwater was contaminated by algae. This was attributed the reduction and modification of organics after UV treatments. It is likely that the UV/MF process is a promising option for water treatment in decentralized water treatment such as micro water grid systems.
조형락,이상호,최용준,최지혁,박영규 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
Currently the country’s foreign energy dependence reaches approximately 97% and the total energy consumption percentage of water supply and wastewater treatment plants reaches approximately 1.35%. Water and sewage treatment plants are mostly energy intensive industries, consuming large amounts of energy at all stages of water intake, drainage, and supply. Reducing energy consumption rate is essential through the development of efficient performance standards and evaluation methods in water and sewage facilities. The development of performance evaluation criteria for equipment and materials used in the water treatment industry can reduce energy use by about 2% to 50% (Pumps, Fans, Compressed Air, Drives, etc.). This study suggests the criteria for evaluation of treatment efficiency were prepared in consideration of raw water quality and the performance of equipment and materials.
다양한 원수를 이용한 막증발법 여과(Membrane Distillation)
조형락,이상호 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
전 세계적으로 수질 개선에 대한 연구와 물 부족 현상을 해결하기 위한 노력이 계속 되어지고 있다. 수질 개선에 대한 방법으로 새로이 각광받고 있는 기술중 하나인 막 증발 법을 이용하여 여러가지 수원을 여과해보았다. 특히, 막 증발법 중에서도 진공을 이용한 진공 막 증발법(VMD) 을 이용하여 처리수를 발생시켰다. 실험 후막 표면의 파울링 현상을 관찰하였으며 이에 따른 투과율을 계산하여 그래프로 나타내었다.
조형락,최용준,이상호 대한상하수도학회 2016 상하수도학회지 Vol.30 No.4
Development of shale gas has drawn increasing attention since it is one of promising alternative energy resources. However, contamination of groundwater and surface water during the extraction of shale gas is becoming a serious environmental issues, which brings the needs to treat wastewater generated from hydraulic fracking. In this study, the feasibility of membrane distillation (MD) for the treatment of shale gas wastewater was investigated using a laboratory scale experimental setup. Flat-sheet MD membranes were used to treat produced water from a shale gas well in the United States. Different configurations such as direct contact MD (DCMD) and air gap MD (AGMD) were compared in terms of flux and fouling propensity. The foulants on the surface of the membranes were examined. The results suggest that MD can treat the shale gas produced water containing more than 200,000 mg/L of total dissolved solids, which is impossible by other technologies such as reverse osmosis (RO) and forward osmosis (FO). In this study, we investigated the possibility of processing and characterization of shale gas produce wastewater using membrane distillation. Laboratory scale membrane distillation experimental device was developed. It was compared the flat-sheet direct contact membrane distillation and flat-sheet air gap membrane distillation. AGMD flux in lower than the flux of DCMD, it was expected that the contamination caused by organic matters.