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권재혁,김병욱,조원태,임재명 江原大學校 附設 環境硏究所 1999 環境硏究 Vol.16 No.-
This study was conducted to investigate the performance and biofilm characteristics of modified media(RUN 2) in comparison with conventional media(RUN 1) on wastewater treatment system. The results were as follows ; At four different HRT of 6, 12, 18 and 24hr, BOD removal efficiency was 65.5, 85.6, 92.2 and 91.9% in RUN 1 and 70.7, 88.7, 94.7 and 95.9% in RUN 2. Biofilm characteristics in each treatment system could be classed as following : i) In RUN 1, the biomass was 2.54 to 3.01㎎/㎥ and its thickness was 342 to 907μm and in RUN 2, this was 560 to 1,180μm and that was 2.54~3.01㎎/㎥. ii) The biofilm dry density was 32.60㎎/㎥ in RUN 1 and 39.06㎎/㎥ in RUN2, respectively. iii) The VSS contents pe unit area were 2,675~2,822㎎VSS/㎠ in RUN 1 AND 2,954~3,123㎎VSS/㎠ in RUN 2. In consider of organic removal rates and biofilm attachment characteristics, it was proved that modified media in RUN 2 was higher than conventional media in RUN 1.
재생여재를 이용한 폐수처리시 생물막의 생물·물리적 특성
권재혁 三陟大學校 産業科學技術硏究所 1998 産業科學技術硏究論文集 Vol.3 No.-
A correlation between the biofilm thickness and biomass density in a laboratory scale submerged media aeration system was evaluted. The laboratory units had Luffa type and SWPP media and the piggery wastewater was used as a substrate. Hydraulic retention time of the laboratory units were 1 day respectively and influent organic loading rate were 25.2 - 38 g COD/m²·day. Following conclusion can be drawn from the operational results : i) the maximum biofilm density of 130 mg/cm³was observed at biofilm thickness of 180 to 200 ㎛ ranges, ii) the active biomass content represented as VSS per unit area was increased up to 10 days of operating time, iii) the COD removal rate was rapidly increased up to the 200 ㎛ of biofilm thickness, however no further increment of COD removal rate was observed between 200 to 1,200㎛ of biofilm thickness.
재생여재를 이용한 호기성 침적형 생물막공정에서의 유기물제거
권재혁 三陟大學校 1997 論文集 Vol.30 No.2
This study was performed for domestic wastewater treatment system, inquired into component of organic matter and biodegradable characteristics in wastewater and extracted removal efficiencies and operating condition of submerged biofilm processes with reused media. BOD and COD in wastewater were from 105 to 103 and from 182 to 254 mg/L, respectively. In order to obtain more than 90 percentage of BOD removal in this process, the organic loading, F/M ration and HRT(Hydraulic Retention Time) should be maintained less than 0.50 KgBOD/㎥/day, 0.1 mg BOD/mg MLVSS and 5 hours, respectively. In general, lower TKN removal efficiency was observed at higher organic loading rate in aerobic submerged biofilm process.
망상형 고정층을 이용한 돈사폐수 처리시 생물막 부착 특성
권재혁,임재명,이정환 한국물환경학회 1994 한국물환경학회지 Vol.10 No.1
A correlation between the biofilm thickness and biomass density in a laboratory-scale submerged media aeration system was evaluted. The laboratory unit had Saran Lock^((TM)) media and the piggery wastewater was used as a substrate. The influent wastewater had COD and BOD concentration of 2,940 to 3,800 ㎎/ℓ and 1,310 to 1,730㎎/ℓ, respectively. HRTs of the laboratory unit were varied from 0.5 to 2 days. Following conclusions can be drawn from the operational results : ⅰ) the maximum biofilm density of 130㎎/㎤ was observed at biofilm thickness of 180 to 200 ㎛ ranges. ⅱ) The active biomass content represented as VSS per unit aera was increased up to 10 days of operating time. ⅲ) The COD removal rate was rapidly increased up to the 200 ㎛ of biofilm thickness, however no further increment of COD removal rate was observed between 200㎛ to 1,200㎛ of biofilm thickness.