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영향인자의 복합적 평가를 통한 낙동강 물금의 조류발생 특성 해석
임지성 ( Ji Sung Lim ),이재호 ( Jae Ho Lee ),김영우 ( Young Woo Kim ),이병헌 ( Byung Hun Lee ),변임규 ( Im Gyu Byun ) 한국수처리학회 2014 한국수처리학회지 Vol.22 No.6
Nakdong River is one of the major river in South Korea. Downstream of this river is the intake station of big cities such as Busan. Algae occurrence in the river was one of problem for a long time. Thus, in this study, long term variation of chl-a and water quality, hydraulic and climate parameters were evaluated in winter and summer season at Mulgeum site in downstream the Nakdong River. Water quality, hydraulic and climate parameters are also used for determination of the parameters significantly affecting chl-a concentration by correlation analysis. As a result high concentration of chl-a has been appeared in winter season by bloom of diatom. Thus, control of algae occurrence at Mulgeum site in winter season is needed more than summer season. Inorganic nutrients and BOD5, pH, DO showed similar variation patterns to chl-a. The value of Hydraulic parameters were increased in summer by Monsoon season in South Korea. In this period, low concentration of chl-a was also caused by Monsoon season. With the result of correlation analysis between chl-a and the other parameters, ten parameters (BOD5, COD, DO, NO3-N, NH4-N, PO4-P, pH, discharge, water velocity and precipitation) showed significant correlation(p<0.05) in winter season. On the other hand, seven parameters (BOD5, DO, water temperature, pH, PO4-P, water velocity and water depth) showed significant correlation with chl-a in summer season. Therefore, we need to make a plan for control of algae occurrence through different significant parameters by seasonal change.
진은정(Eun Jung Jin),길대수(Dae Soo Gil),이창근(Chang Gun Lee),이병헌(Byun Hun Lee) 한국수처리학회 2000 한국수처리학회지 Vol.8 No.4
N/A This study was carried out to investigate the electrolysis treatabillity of livestock wastewater having high concentration of organic matters and nitrogen. Experiments were conducted to study any effects according to the operating conditions such as the current density, retention time and the ratio of added sea water. Possible optimum range for these operating variables are experimentally determined. In electrolysis process, removal efficiencies increased with the current density, ratio of added sea water and the length of retention time. With 0.4d㎡ electrode per 1L reaction volume, it was recommend the best conditions are 30% sea water, 5A/d㎡ current density and 4 hours of HRT. When livestock wastewater treatment applied electrolysis, removal efficiencies of COD, TP and TN lead to 90%, 86%, and 94% respectably. These results may indicated that electrolysis has an excellent nitrogen removal ability for treatment of livestock wastewater.
음식물 산 발효액을 외부 탄소원으로 이용한 AOAS 공정의 하수처리특성
이재성,이민규,최해경,이병헌 한국수처리기술연구회 2000 한국수처리학회지 Vol.8 No.3
The purpose of this study was to improve the removal nutrient removal efficiency at low COD/TN ratio municipal wastewater. The applicability of raw food fermentation supernatant(FFS) as external carbon source in low organic strength municipal wastewater in Korea. A laboratory scale experiments were conducted to compare performance characteristics of AOAS(Anoxic-Oxic-Anoxic-Stripper) at various external carbon sources. Three external carbon sources which were methanol, synthetic food fermenter supernatant and raw food fermenter supernatant(FFS2) derived from the laboratory acid fermenter were added to anoxic zone for the improvement of nutrients removal efficiencies. Food fermenter supernatants were good external carbon source for denitrification similar to methanol.
이동석,이병헌,강성재,감성희,유평종 한국물환경학회 2001 한국물환경학회지 Vol.17 No.6
This study was conducted to estimate the effects of real time control for AOAS SBR system. D0, pH and ORP were good indicators on nitrification and denitrification. Among these, ORP was the most effective and stable. To save the aeration energy and to promote the removal efficiency, the system was controlled on real time basis by using ΔORP as a control parameter. When the system was controlled on real-time basis, 31∼66% of energy was preserved. NH₄^+-N removal efficiency was 99%, but post denitrification rate was very poor because of deficiency in the carbon source. This process should select to add external carbon source or step-feeding method in order to improve the post-dinitrification reaction.