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반응성 염료의 색도제거를 위한 균주의 분리 및 성장 특성
임학상,김정목,한명호 대한상하수도학회 1998 상하수도학회지 Vol.12 No.4
Strains degrading and decolorizing reactive dyes, Procion blue HEGN and Procion red HE7B were isolated from water system, are named as RBM1 and RRK, the growth characteristics of which were investigated. Decolorization efficiencies after 42 hrs in batch culture were 95% and 77%, respectively, and the optimal culture conditions of temperature and pH were 30℃, 7.0. Decolorization efficiencies in condition of aerobic shaking culture by strains RBK1 and RRK conspicuously increased, and culture by strain RBK1 was found as 95% after 42 hrs, while standing culture was 64%. Optimum nitrogen source was peptone, and It was found that decolorization efficiencies by straiins RBK1 and RRK increased up to 4,000 mg/l of peptone concentration as nitrogen source, but peptone concentration didn't influence the decolorization efficiency in above 4,000mg/l. When the concentration of dyes were more than 800mg/l and 400mg/l respectively, the strains RBK1 and RRK, which degrade Procion blue HEGN and Procion red HE7B, showed a sharply decreased decolorization efficiencies; then the specific growth rate were 0.25 hr^-1 and 0.09 hr^-1.
임학상,최준호,한명호 대한상하수도학회 1997 상하수도학회지 Vol.11 No.2
Removal characteristics of volatile organic carbons(VOCs) by ozone oxidation and other processes in the raw water of the 1st Nakdong water treatment plant were investigated. Dichrolomethane, toluene and other 7 compounds were detected in the raw water. With regard to detected 4 compounds in finally treated water, it was found that VOCs could not be removed effectively by traditional water treatment process. Benzene, 1,2-dichlorobenzne were not detected in the raw water but they were detected in the process of treatment. The compound of highest detection frequency was dichloromethane. When the raw water was controlled at pH 7, temperature 20℃, 5 minutes as contact time, 10 minutes as reaction time, the removal rate of THMFP, KMnO_4 demand, TOC, UV_254nm and NH_3-N were 46,4%, 22%, 19.6%, 31% and 8%, respectively. From estimating the finally treated water qualities in 7 kinds of treatment processes, P-6 process(raw water-chlorination-coagulation-ozonation) was most effective for organies removal and THMs control. Removal efficiencies for KMnO4 demand and TOC by the process which combined preozonation with coagulation was twice better than only preozonation. NH_3-N removal rate was shown as 10% by P-3 process(raw water-coagulation-ozonation), but 83% of NH_3-N was removed by P-4 process(raw water-coagulation-chlorination). It was found that the chlorination is more effective than the ozonation for the NH3-N removal as commonly known.
Acrylate esters를 함유한 폐수의 처리를 위한 균주의 분리 및 성장특성
임학상,김정목 世明大學校 1995 世明論叢 Vol.4 No.-
Strain degrading acrylate esters were isolated from water system, and it was identified a sVibrio Metschnikovii. Sizing agents of polyester textile were devided into use for water jet, general and water dispersed weaving machine. COD removal efficiencies of these by isolated strain were 87%, 88% and 68% after 68-hour-in-batch culture, respectively. Acrylate esters of use for water jet and general weaving machine were more easily degraded than that of water dispersed due to its different structure. Optimum culture conditions of pH and temperature were found to be 7.6 and 30℃. And optimum nitrogen and phosphorus sources were (NH4)2SO4, urea and K2HPO4, respectively. Regarding chemical structure of polyester, relative viscosity of acrylate ester was slightly decreased to 0.93 from 1 because viscosity of acrylate esters was not too large.