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하수처리수 재이용을 위한 가압식 규조토 여과의 처리성능평가
임병란,김희서,고연실,김현갑,김종학,이태진 한국물환경학회 2019 한국물환경학회지 Vol.35 No.2
The purpose of this study was to investigate treatment characteristics of diatomite filtration, that would allow water recovery from biologically-treated effluent for reuse. Diatomite, Celpure 100, and acid clay were used as filter-aids, with a support filter manufactured from polyethylene (PE), and polypropylene (PP). This pre-coating process using diatomite filter-aids, is used in the filtration range of pressure filters, and has consistently provided high-quality separation. The results showed that variations in average removal efficiency of SS, and T-P from biologically treated effluent by the diatomite-coated PE filter, were approximately 82.2~88.9% and 4.8~21.1%, respectively. T-P treatment efficiency of the PP filter pre-coated with diatomite and CelpureⓇ100 at 57.64 g/m2, was approximately 24±10% and 40±15% on average, respectively. Particle size distribution of secondary effluent varied from 0.05 to 200 μm, and d50 value was 20.76 μm. The size distribution of particles in the diatomite filtrate ranged from 1.26 to 101.1 μm when pre-coated with diatomite filter-aid, at a content of 57.64g/m2. Diatomite filter aids, i.e., the particles that form the pre-coating layer, capture very fine particles as well as macromolecules, owing to their complex structure with numerous fine microscopic pores, and surface properties. The filtration process using diatomite and CelpureⓇ100 as filter aids, has been successfully applied, to recover water from sewage for reuse. The disadvantage of the process, is that the particle size of the filter-aid is spent, because of pressurization.
생물활성탄을 이용한 절삭유로 오염된 지하수의 처리특성과 미생물군집구조 해석
임병란,배시애,임호주,조창호,Lim Byung-Ran,Bae Ci Ae,Lim Ho-Ju,Cho Chang-Ho 한국환경보건학회 2006 한국환경보건학회지 Vol.32 No.1
Treatment performance and microbial community structure were investigated in water-soluble cutting oil treatment process using biological activated carbon. DOC removal in BACI column at $15^{\circ}C$ was higher than at $25^{\circ}C$, but those of BAC3 column after 60days was high at$25^{\circ}C$. Also, quinone content of first-step reactors at $25^{\circ}C$ and $15^{\circ}C$ was much the same, but those of the third-step reactor at $25^{\circ}C$ was higher than at $15^{\circ}C$. The dominant type of two apparatus was ubquinone (UQ)-l 0 followed by UQ-8. Menaquinones were detected from $25^{\circ}C$ apparatus and effluent. This suggested that DOC removal at $25^{\circ}C$ was advanced degradation by attached microorganisms on the activated carbon surface. The DOC removal in long-term activated carbon apparatus increased with going in BAC3 column. This indicated the influent of POC was a result of DOC removal efficiency decrease. Integrated DOC removal from start point in experiment to break point and quinone content were showed a tendency of increasing with going last-step activated carbon apparatus. Therefore, the biological activated carbon apparatus used by this study was effective treatment process in contaminated groundwater by water-soluble cutting oil.
미세조류를 이용한 양돈폐수 고도처리에서 슬러지 및 이산화탄소의 첨가의 영향
임병란,박기영,이기세,이수구 대한상하수도학회 2011 상하수도학회지 Vol.25 No.3
The potential of algal-bacterial culture was investigated for advanced treatment of animal wastewater. Fed-batch experiments were carried out to examine treatability of nitrogen and phosphorus in different microbial consortium: Chlorella vulgaris, activated sludge, three microalgae strains (Scenedesmus, Microcystis, Chlorella) and Bacillus consortium, and three microalgae strains and sludge consortium. Single culture of C. vugaris showed the better efficiency for nitrogen removal but was not good at organic matter and phosphorus removal compared with activated sludge. Three microalgae and Bacillus consortium was best culture among the culture and consortium for pollutants removal tested in this experiment. Effect of CO2 addition was studied by using three microalgae and Bacillus consortium. CO2 addition enhanced T-P removal efficiency up to 60%. However, removal efficiencies of T-N and ammonia nitrogen reduced on the contrary