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김경애(Kyung-Ae Kim),이병옥(Byeng Ok Lee),김오목(Ou Mok Kim),허명제(Myung Je Hur),김경태(Kyung Tae Kim),노재일(Jae Il Ro),최춘석(Choon Suck Choe),고종명(Jong Myoung Go),김용희(Yong Hee Kim) 대한환경위생공학회 2007 대한환경위생공학회지 Vol.22 No.3
In order to investigate water pollution of spring, we carried out the experiments on mineral water, rainwater and surrounding soil of several springs collected in Incheon area from February to August in 2007. The results were as follows. 1. Soil : This study investigated the pH and organic matter contents in the soil which effect on microorganisms, The pH value was from 4.5 to 5.3 on average and organic matter contents ranged from 1,09 % to 5,6% and E. coli, K. pneumoniae, S.faecalis and other microorganisms were isolated. 2. Natural mineral water : As the rainfall increased, the concentration of No?-N, consumption of KMnO₄ and the number of microorganisms was increased while the other physicochemical items were not affected. The microorganism isolated in the natural mineral water were as follows: E. coli. K. oxytoca S. faecalis, S. facium, and so on from evacuation; E. agglomerans, E. amnigenus, E. cloacae, E. sakazakii and so on from the environments and evacuation. Detection of these microorganisms shows that the environment around the spring had been exposed to excrements of the warm blood animal. 3. Rain : The coliforms in the rain were the identical one detected from the mineral water and the soil. In conclusion the quality of natural mineral water is influenced by rain, resident bacteria of soil and surrounding environment. This study will be the basic data of characteristics of spring in Incheon area and also this result will give useful aids for the efficient control of spring.
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이온교환수지와 무가염소독을 이용한 마을상수도 수질개선에 관한 연구
문백수 ( Bag-sou Moon ),박진영 ( Chin-young Park ),김오목 ( Ou-mok Kim ),서상원 ( Sang-won Seo ),전용성 ( Yong-seong Jun ),곽영주 ( Young-ju Kwak ) 한국수처리학회 2016 한국수처리학회지 Vol.24 No.5
This study was conducted to effectively control the nitrate-nitrogen and microorganism contamination in the small scale water supply system using the mini-module, the pilot plant and the field demonstration plant in turns. The results were as follows; The ion exchange resin was more effective than RO for removal 01 the nitrate-nitrogen. The nitrate-nitrogen removal rate of RO was constant, but the rate of Ion exchange resin was reduced according to the operation time. The nitrate-nitrogen and sulfate ion were removed up to 90% by ion-exchange resin until regeneration. Chloride ion was increased at the ion exchange resin treated water than raw water. The microorganisms were formed at the ion exchange resin, so a sterilization step is necessary in the water treatment process. The concentration of cations was not changed at the ion exchange resin treatment. Microbial growth happened at the ion-exchange resin, pre-processing filter, and the ultra filtration membrane. The heterotrophic bacteria 420 CFU formed at the ion exchange resin was not detected when sterilized by residual chlorine 0.5 mg/L generated by electrolysis without adding salt. The electricity to make the residual chlorine can be decreased by using the increased chloride ion replaced by nitrate in the ion exchange resin than chloride ion in the raw water, for example when make the residual chlorine 1 mg/L and 6 mg/L, the electricity was reduced 2.9 times, 3.9 times, respectively.
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