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빈정인,이병헌,김중균,권성현,감상규,이민규 한국환경과학회 2001 한국환경과학회지 Vol.10 No.4
A packed bed of volcanic rock was used as deodorizing material to remove hydrogen sulfide(H_2S) from air in a laboratory-scale column, and was inoculated with Thiobacillus sp. as H_2S oxidizer. The effects of volcanic rock particle size distribution on system pressure drop were examined. Various tests have been conducted to evaluate the effect of H_2S inlet concentration and EBCT(Empty Bed Contact Time) on H_2S elimination. The pressure drop for particles of size range from 5.6 to 10 ㎜ was 14 ㎜H_2O/m at a representative gas velocity of 0.25m/s. Biofilter using scoria and Thiobacillus sp. could get the stable removal efficiencies more than 99.9% under H_2S inlet concentrations in the range from 30 to 1,100ppm at a constant gas flow rate of 15.2 ℓ/min. H_2S removal efficiencies greater than 99% were observed as long as EBCT was longer than 8sec at the 250ppm of H_2S inlet concentration. When EBCT was reduced to 5.5 sec, H_2S removal efficiency decreased by about 12 percent. The maximum H_2S elimination capacity was determined to be 269g-H_2S/㎥·hr.
MS Excel 시뮬레이터(PKES)를 이용한 하수처리장 유출수 및 온실가스 모델링
빈정인,이병헌 대한상하수도학회 2014 상하수도학회지 Vol.28 No.6
This paper presents PKES(PuKyung -Excel based Simulator) for WWTPs(wastewater treatment plants) by using MS Excel and VBA(Visual Basic for Application). PKES is a user-friendly simulator for the design and optimization of the whole plant including biological and physico-chemical processes for the wastewater and sludge treatment. PKES calculates the performance under steady or dynamic state and allows changing the mathematical model by the user. Mathematical model implemented in PKES is a improved integration model based on ASM2d and ADM1 for simulation of AS(activated sludge) and AD(anaerobic digestion). Gaseous components of N2, N2O, CO2 and CH4 are added for estimation of GHGs(greenhouse gases) emission.The simulation results for comparison between PKES and Aquasim(EAWAG) showed about the same effluent concentrations. As a result of verification using by measured data of BOD, TSS, TN and TP for 2 years of operation, calculated effluent concentrations were similar to measured effluent concentrations. The values of average RMSE(root mean square error) were 1.9, 0.8, 1.6 and 0.2 mg/L for BOD, TSS, TN and TP, respectively. Total GHGs emission of WWTP calculated by PKES was 138.5 ton-CO2/day and GHGs emissions of N2O, CO2 and CH4 were calculated at 21.7, 28.9 and 87.9 ton-CO2/day, respectively. GHGs emission of activated sludge was 32.5 % and that of anaerobic digestion was 67.5 %.
이창근,황은주,강성재,빈정인,이병헌 한국물환경학회 2004 한국물환경학회지 Vol.20 No.3
In this study, ozone was adopted for the reduction and stabilization of waste sludge from the municipal sewage treatment plant. The waste sludge used in the experiments was primary sludge, excess sludge and a mixture of the two. The sludge cells and flocs were disrupted by ozonation resulting in the reduction of TSS and VSS concentrations. In the case of the primary sludge with a concentration of 20 gTS/L, the TSS and VSS concentrations were reduced 28%, 33% and the TCOD concentration was reduced 20% respectively. The consumption of ozone was 0.18 gO₃/gSS. In the case of the excess sludge with a concentration of 7.5 gTS/L, the TSS and VSS concentrations were reduced 37%, 41%, and the TCOD concentration was reduced 19% respectively. The consumption of ozone was 0.33 gO₃/gSS. In the case of the mixed sludge of 9.3 gTS/L, the TSS and VSS concentrations were reduced by 45%, 53%, and the TCOD was reduced 26% respectively. The desirable consumption of ozone was 0.27 gO₃/gSS. As ozonation proceeded, the level of SCOD increased due to the release of intracellular materials. However TCOD was reduced due to mineralization resulting from the transformation of organic materials to inorganic materials.