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- 저자 : 현길수 ( Hyeon Gil Su ) (검색결과 4 건)
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혐기,호기 생물막 공법에 있어서 충진여재의 특성과 구성조건
현길수 ( Hyeon Gil Su ),최정우 ( Choe Jeong U ) 한국수처리학회 2003 한국수처리학회지 Vol.11 No.4
N/A The objective of this research was to investigate the configuration condition and the characteristics of the filter media packed into biological-film(biofi1m) reactor on an advanced wastewater treatment to remove nitrogen and phosphorus. For this research, the experiment of pilot-scale plant was carried out at real wastewater treatment plant and used the effluent of preliminary clarifier as raw wastewater. Used packed media into the biofilm reactor were global ceramic, honeycomb panel, fibrous panel, and rotating disc. The biofilm process consists of anaerobic and aerobic zones. Based on the results of this research, at volumetric loadings of 0.060-0.420 kgCOD/㎥·d, 0.080-0.141kg T-N/㎥·d, and 0.015-0.022kg T-P/㎥·d, the substrate residual ratio(C/Co) of the global ceramic media biofilm were 0.28-0.26 of COD, 0.38-0.34 of T-N, and 0.30-0.29 of T-P, the C/Co of the fibrous panel media biofilm 0.24-0.23 of COD, 0.55-0.50 of T-N, and 0.37-0.35 of T-P, the C/Co of the honeycomb panel media biofilm 0.73-0.68 of T-N, 0.48-0.52 of T-P, and the C/Co of the rotating disc media biofilm 0.30-0.28 of COD, 0.59-0.57 of T-N, and 0.43-0.41 of T-P, respectively. The C/Co of the global ceramic media biofilm were lower than that of other media, which was resulted in attaching more much biomass on the surface of the media having more wide specific area than the other media. The backwashing frequency of the ceramic media biofilm bed was 5 times shorter than that of the other biofilm beds with 5-6 days/backwash of the fibrous media and 10-15 days/backwash of the honeycomb media. Compared to the C/Co of global media biofilm, the one of the panel media biofilm were higher that indicate to have to improve the contacting efficiency of substrate and the biomas attached on the surface of the media.
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최윤영 ( Choe Yun Yeong ),현길수 ( Hyeon Gil Su ),최정우 ( Choe Jeong U ) 한국수처리학회 2004 한국수처리학회지 Vol.12 No.1
N/A In this research the Koreanized 3-DFM model(ver. 1.1.1) has been designed to establish the program mentioned above, and 3-DFM(ver. 1.1.2) is reconstructed that equipped with strengthened graphic function for post processes. All the input data settings of the 3-DFM model which is developed in this study are organized in Korean, and the model contains help function for each input data. Thus, it is designed to get detailed information about each input parameter when the mouse pointer is placed on the corresponding input parameter. This model also is designed to easily specify the geologic boundary condition for each stratum or initial head data in the work sheet. In addition, this model is designed to display boxes for input parameter writing for each analysis condition so that the setting for each parameter is not so complicated as existing MODFLOW is when steady and unsteady flow analysis are performed as well as the analysis for the characteristics of each stratum. Descriptions for input data are displayed on the right side of the window while the analysis results are displayed on the left side as well as the TXT file for this results is available to see. The model developed in this study is a numerical model using finite differential method, and the applicability of the model was examined by comparing and analyzing observed and simulated groundwater heads computed by the application of real recharge amount and the estimation of parameters. The 3-DFM model is applied in this study to Sehwa-ri, and Songdang-ri area, Jeju, Korea for analysis of groundwater flow system according to pumping, and obtained the results that the observed and computed groundwater head were almost in accordance with each other showing the range of 0.03-0.07 error percent. 3-DFM(ver. 1.1.2) model in this research, strengthened the graphic (post processes) functions, needs to set precise helps of input parameters and output values for the people in charge to conveniently apply the model to the site. Therefore it is thought that there are many things to be improved through collecting various data, and that such defects should be given priority to be complemented an dimproved in the future.
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김영진 ( Kim Yeong Jin ),임용성 ( Im Yong Seong ),신판세 ( Sin Pan Se ),현길수 ( Hyeon Gil Su ) 한국수처리학회 2004 한국수처리학회지 Vol.12 No.1
N/A The formation of disinfection by-products(DBPs) is one of the major issue in drinking water quality control. A significant amount of Trihalomethanes (THMs) and Haloacetic acids (HAAs) are produced by chlorinating the raw water or organic compounds extracted from natural water. With an advances in the analysis of chlorination by-products and their health effects, numerous organic halides such as HAAs, THMs, haloacetonitriles. etc have been identified at low level. Animal studies have demonstrated that dichloroacetic acid(DCAA) causes a carcinogen. A five kinds of HAAs such as MCAA, DCAA, TCAA, MBAA and DBAA are regulated under the U.S Environmental Protection Agency`s proposed Disinfectant Disinfection By-Products Rule. The goal of this study was to control DBPs contained in the drinking water from HM, DS, MJ and PES water treatment plants(WTP). The results obtained from this study are as fallows : for HMWTP, DSWTP, and MJWTP, the THMs concentrations were 22∼29,%/L, 22∼28㎍/L, and 6∼8㎍/L, and the HAAs concentrations were 1∼22㎍/L, 1∼16㎍/L. and 0.4∼16㎍/L, respectively, which were very low value compared to USEPA rule of DBPs. The HAAs was seen to be decreased rapidly in the sand filter of the WTP. This was caused by the HAAs biodegraded in the sand filter. In addition, HAAs can be removed in the advanced treatment process although an adsoption of the THMs is gone.
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