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RISS 인기검색어
- 검색키워드
- 저자 : 유재근 ( Yeon Taek Rim (검색결과 3 건)
- 무료
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임연택(Yeon Taek Rim),서정범(Jeong Beom Seo),김용석(Yong Seok Kim),권오상(Oh Sang Kwon),한기봉(Gee Bong Han),유재근(Jae Keun Ryu) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.4
This study was focused on survey of sewage characteristics and investigation of operational efficiencies in terms of BOD, SS, TN and TP for treatment facility built on on-site apartment building. The oxidation ditch process of 40㎥/day capacity was applied for sewage treatment system. The results of the research showed that earth household had 3.2 dwellers with a sewage flow rate of 242Lpcd in average. The sewage flow rate was particulary low on Saturday and Sunday. The average sewage concentration of BOD, SS, TN and TP were 145㎎/L, 101㎎/L, 33.3㎎/L and 2.8㎎/L, respectively. BOD removal was observed to be 91.7% on average while SS removal to be 77.0% on average. Denitrification/nitrification were accomplished during intermittently aerated processes and removal rate of nitrogen was 50.0% in terms of total nitrogen. Removal efficiency of phosphorus was 47.7% in terms of total phosphorus. The average effluent concentration of BOD, SS, TN and TP were 12.0㎎/L, 19.5㎎/L, 17.0㎎/L and 1.5㎎/L, respectively. Observed microbial yield coefficient was 0.16gMLSS/gBOD. This experiment may prove that intermittently aerated oxidation ditch process can be employed to treat organic matter as well as nutrients in sewage that are generated from such sources as apartment building and community area.
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임연택,서정범,유재근 ( Yeon Taek Rim,Jeong Beom Seo,Jae Keun Ryu ) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.1
Treatability and pressure difference in ultrafiltration was investigated in sequential anaerobic/aerobic activated sludge wastewater treatment system. Ultrafiltration had advantages for sludge separation than secondary sludge settling tank in biological wastewater treatment system. Clean and steady water quality in effluent was achieved but the flux was decreased with the lapse of time. Accordingly, the influence of control parameters of backwashing intervals and various loading rate to treatment efficiency and pressure difference to sustain steady flux were studied for the combination process of activated sludge and ultrafiltration membrane. The effluent BOD concentration showed less than 2㎎/l and T-N resulted in 11.5∼21.2㎎/l in this system. When organic loading rate was 0.5㎏BOD/㎥·d with less than 0.04㎏/c㎡ pressure difference the system could be controlled to sustain 0.2㎥/㎡·d flux. Specifically, hydrophilic membrane showed less than 0.02㎏/c㎡ pressure difference. Flux of 0.2㎥/㎡·d required 0.04㎏/c㎡ pressure difference but higher pressure difference was required to raise flux. Outside pressure infiltration and suction infiltration were compared. 0.25∼0.35㎏/c㎡ pressure difference was required to earn 0.2㎥/㎡·d of flux for outside pressure infiltration but only 0.04㎏/c㎡ pressure difference was required for the same flux of in the case of suction infiltration. In conclusion, there were no difference in effluent water quality between filtration by hydrophobic membrane and hydrophilic membrane but lower pressure difference was required by hydrophilic membrane to earn steady flux rate. When flux and organic loading rate in the reactor was raised, the required pressure difference was dramatically increased. In the case of longer backwashing intervals pressure difference tends to build up.
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서정범(Jeong Beom Seo),임연택(Yeon Taek Rim),권오상(Oh Sang Kwon),한기봉(Gee Bong Han),유재근(Jae Keun Ryu) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.2
This study was focused on investigation of operational efficiencies in terms of BOD, SS, TN and TP for treatment facility built on-site apartment building. The sequencing batch reactor (SBR) activated sludge process of 40㎥/day capacity was applied for sewage treatment system. The results of the research showed that the sewage flow rate and BOD concentration was particulary high at about 8:00 p.m. and 10:00 a.m., respectively. The average sewage concentration of BOD. SS, TN and TP were 145.4㎎/L, 101.l㎎/L, 33.3㎎/L and 2.8㎎/L, respectively. In operational steady state, BOD removal was observed to be 94.9% on average while SS removal to be 88.2% on average. Denitrification/nitrification were accomplished during SBR processes and average removal rate of nitrogen was 71.8% in terms of total nitrogen. Nitrogen removal was not affected by the winter season. Removal efficiency of phosphorus was 76.9% in terms of total phosphorus. The average effluent concentration of BOD, SS, TN and TP were 8.3㎎/L, 11.4㎎/L, 9.0㎎/L and 0.6㎎/L, respectively. Observed microbial yield coefficient was 0.29gMLSS/gBOD. This experiment may prove that the SBR process can be employed to treat organic matter as well as nutrients in sewage that are generated from such sources as apartment building and community area.
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