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동해·삼척시 하수처리장 건설을 위한 생물학적 분해도의 실험적 연구
김승호,민선홍,권재혁 三陟大學校 1994 論文集 Vol.27 No.-
This study was initiated to study the treatability of sewage produced in Donghae and Samchok by applying activated sludge process. Experiment was operated by increasing the aeration basin HRT from 2 to 8 hours. The results of study, the removal efficiencies were reduced according to increase BOD loading rate. The kinetic coefficient, K and Ks were ??, 86.4~62.5㎎/L respectively.
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 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.
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.
민선홍,김병욱,권재혁 三陟大學校 2000 論文集 Vol.33 No.2
Where control of algal growths in the receiving water is necessary to protect beneficial uses, removal or reduction of nitrogen in wastewater prior to charge may be desirable. An object of this study is development of nitrification(conversion TKN to nitrate) rate in domestic wastewater treatment. A bench scale reactor used in this study has reused media(SWPP media). This study was conducted to investigate the performance and bioflim characteristics of modified media(RUN 2) in comparison with conventional media(RUN 1) on wastewater treatment system. Influent BOD, COD and TKN concentration were ranged 254.1 to 270.4 mg/L, 473.0 to 498.4 mg/L and 19.3 to 21.4 mg/L, respectively. During operating time for 116 day, organic loading rates were 0.254 to 1.044 kgBOD/㎥/day and nitrogen loading rates were 19 to 86 gTKN/㎥day. The results were as follows ; Nitrogen removal efficiency was 22.3, 36.1, 90.4 and 95.8% in RUN 1 and 25.2, 75.1, 95.1 and 96.7% in RUN 2. Effluent NO₃-N concentration in RUN1 and RUN2 were 0∼15.54mg/L, 0.09∼15.99 mg/L, respectively.
생물막 반응조에서 돈사폐수의 유기물 특성 및 동력학계수 산정
한동준,임재명,권재혁 江原大學校 産業技術硏究所 1996 産業技術硏究 Vol.16 No.-
This research was performed for the fundamental data using a advanced treatment process of piggery wastewater. Characteristics of influent wastewater was divided with various methods in fixed biofilm batch reasctor. Fractons of organic were divided into readily bioderadable soluble COD(Ss), slowly biodegradable COD(Xs), nonbiodegradable soluble COD(S?),and nonbiodegradable suspended COD(X?). Experimental results were summerized as following : i)biodegradable organics fraction in piggery wastewater was asbout 88.1 percent, and fraction of readily biodegrasdable soluble COD was about 66.1 percent. ii)Fractions of nonbiodegradable soluble COD was 11~12 percent, and soluble inert COD by metabolism was producted about 6~8 percent. iii) Active biomass fraction of attached biofilm was about 54.7percent, annd substrate utilization rate and maximum specific growth rate of heterotrophs were 8.315 d and 3.823 d? respectively.