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박재홍 ( Jae Hong Park ),류덕희 ( Doug Hee Rhew ) 한국물환경학회(구 한국수질보전학회) 2018 한국물환경학회지 Vol.34 No.2
Small-scale wastewater discharge facilities account for 98% of all workplaces, but in the generation and emission of major pollutants, they account for 27.5 % and 23.5 %, respectively. Since the proportion of the emission load of the small-scale workplace is not large, the national environmental policy has been established mainly around large-scale wastewater discharge facilities. However, in the case of specific hazardous substances in water, the amount of the discharge load of the small-scale wastewater discharge facility was 2.4 times higher than that of the generation load. Certain types of specific hazardous substances in water, which have a higher discharge load than large-scale wastewater discharge facilities, account for 24 ~ 32 %. There are also cases in which the discharge load from a small-scale discharge facility is more than four times higher, depending on the specific kind of water pollutant. As a result of inspections, the violation rate of the small-scale wastewater discharge facility among the total violations by facilities is 93.9 ~ 97.5 %. As a result, the ecotoxicity value of small-scale wastewater discharge facilities was high in most industries, and there was a fluctuation in the measured value. This indicates that the ecological integrity of the water system can be largely influenced by small-scale wastewater discharge facilities. Therefore, it is necessary to expand the environmental management of small-scale wastewater discharge facilities, and in some cases, the effect of the improvement in quality may be more significant than in the management of large-scale wastewater discharge facilities.
파이롯트 규모의 혐기 / 무산소 / 호기공법에 의한 오수처리
홍정선,서정범,윤조희,류덕희,김용석,류재근,서윤수 ( Jeong Seon Hong,Jeong Beom Seo,Cho Hee Yoon,Deok Hee Rhew,Yong Seok Kim,Jae Keun Ryu,Yoon Soo Suh ) 한국물환경학회 1996 한국물환경학회지 Vol.12 No.4
Sewage which nitrogen and phosphorus are much contained relatively in comparison with others was treated by the anaerobic/anoxic/oxic process of pilot-scale. The sewage characteristics and treatability were studied and the results obtained at a given experimental condition can be summarized as follows. Pollutant concentrations of sewage were shown in the ranges of TBOD 180∼470㎎/L (average 281㎎/L), TCOD 72∼157㎎/L(average 94㎎/L), SS 119∼570㎎/L(average 274㎎/L), TN 19∼107㎎/L(average 51㎎/L) and TP 2.2∼14.6㎎/L(average 5.3㎎/L). Influent concentration of pollutants was highest at 7 AM. In steady state, average removal efficiencies by this process were shown to be 92.5% in TBOD, 83.7% in TCOD, 93.9% in SS, 55.7% in TN and 75.3% in TP, respectively. TBOD removal in anaerobic basin was about 75% of total removed TBOD. It was possible to operate in volumetric loading rate of 1.5kg TBOD/㎥·day. Removal efficienices in this loading rate were shown to be above 80% in TBOD and SS, above 50% in TN and above 60% in TP. Observed microbial yield was 0.21g MLSS/g TBOD. Therefore, generation of excess sludge was about 50∼60% smaller than ones of activated sludge process.
기술노트 : 수질오염총량관리제 시행에 따른 영산강,섬진강수계 단위유역의 수질 현황
박재홍 ( Jae Hong Park ),류덕희 ( Doug Hee Rhew ),정동일 ( Dong Il Jung ) 한국물환경학회(구 한국수질보전학회) 2011 한국물환경학회지 Vol.27 No.5
The results of investigation on the water quality of the unit watersheds in the Yeongsang/Seomjin River indicate that BOD5, SS, T-P decrease in most of the unit watersheds. However, CODMn and T-N increase since the Total Maximum Daily Loads (TMDLs). It is thought that CODMn, which is included non-biodegradable matters, is difficult to decrease only using by conventional biological treatment facilities and T-N is affected by non-point source, etc. The results of assessment on 3 years BOD5 indicate that most of the unit watersheds were being improved except Yeongbon A, Seombon C and Yocheon B. In addition, it was found that T-P were also being improved except Yocheon B and Hwangryeong A. Consequently, water qualities of the unit watersheds have been improved in many cases since the TMDLs.
정재운,윤광식,주석훈,최우영,이용운,류덕희,이수웅,장남익,Jung, Jae-Woon,Yoon, Kwang-Sik,Joo, Seuk-Hun,Choi, Woo-Young,Lee, Yong-Woon,Rhew, Doug-Hee,Lee, Su-Woong,Chang, Nam-Ik 한국농공학회 2009 한국농공학회논문집 Vol.51 No.6
In this study, pollutant loads delivery ratio by flow duration in Hwangryoung A watershed was estimated. The delivery ratio was estimated with measured data by Ministry of Environment(MOE) and the regression equation based on geomorphic parameters. Eight day interval flow data measured by the MOE were converted to daily flow to calculate daily load and flow duration curve by correlating data of neighboring station which has daily flow data. Regression equation developed by previous study was tested to study watershed and found to be satisfactory. The delivery ratios estimated by two methods were compared. For the case of Biochemical oxygen demand(BOD), the delivery ratios of low flow condition were 7.6 and 15.5% by measured and regression equation, respectively. Also, the delivery ratios of Total phosphorus(T-P) for normal flow condition were 13.3 and 6.3% by measured and regression equation, respectively.
박재홍 ( Jae Hong Park ),이재관 ( Jae Kwan Lee ),오승영 ( Seung Young Oh ),류덕희 ( Doug Hee Rhew ) 한국물환경학회 2013 한국물환경학회지 Vol.29 No.3
Total phosphorus was set as a target indicator to prevent eutrophication and algae growth, etc., in three major rivers (Nakdong River, Geum River and Yeongsang/Seomjin River) for the second phase (2011 ∼ 2015) in total maximum daily loads (TMDLs) system. However, total phosphorus management was restrictively introduced, i.e., upstream of the Lake Daechung, in the Geum River watershed. Total phosphorus concentration and trophic levels in downstream of the Lake Daechung (include Mangyeong and Dongjin rivers) were increased more than upstream. Therefore, it is necessary to expand total phosphorus management in all watersheds of the Geum River. If total phosphorus was managed in all area of the Geum River watershed, it is possible to decrease total phosphorus concentration and trophic levels, and solve the unbalanced water quality between up and downstream of the Lake Daechung.