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가로림만 유역개발 계획에 따른 해양수질 영향 예측에 관한 연구
주현종 경기대학교 부설 산업기술종합 연구소 1996 산업기술종합연구소 논문집 Vol.12 No.-
This environmental impact assessment study was conducted on ocean water quality of Garorim Bay in north-west coastal area of Chungchungnam-Do Province, where tidal power plant with comprehensive development plan is under progress. The impact by tidal power station itself may not be significant compared to the total impact anticipated by comprehensive adjacent area development plan. However, during the study, many problems were noticed for the impact assessment practices by present impact assessment policy to protect the environmental quality of bay area. Thus, this study was emphasized on searching the related problems and possible improvement measures for quantitative analysis of present impact assessment policy. New and fundamental suggestions and alternatives are also presented to help making more reasonable and practical impact assessment policy for environmental quality conservation of the bay area water quality.
주현종,이광현 京機大學校 2006 論文集 Vol.50 No.-
The object the study diagnose and analyse on industrial wastewater treatment plant. The term bulking has been used for many to describe problems. associated with the separation of activated of sludge. A precise definition tern is difficult since in the past it has been used to describe a variety of problems. This has resulted in considerable confusion for those trying to investigate the phenomenon. The effect of bulking on the quality of final effluent from an activated-sludge plant will depend on the seriousness of the problem and the design of the secondary settlement thanks. Where settle ability is poor, but not excessively so, and the design of secondary settlement tanks is reasonably conservative, it is that under such circumstances a deep sludge blanket forms in the settlement tank and the latter then acts a blanket clarifier. Filtration of suspended material occur in the blanket and this results in a final effluent with a lower suspended-solids content and a proportionately reduced biochemical oxygen demand.
주현종 경기대학교 부설 산업기술종합연구소 2002 산업기술종합연구소 논문집 Vol.23 No.-
The study is performed a stable treatment of wastewater with nitrate of high concentration, as automatic control in anoxic SBR process. As high concentrated nitrogen wastewater treatment facility, reactor's capacity is designed by considered quantity and quality for facility capacity of 2㎥/day. Effluent tank and influent tank of .1㎥ are established. Reactor treatment is devided by automatic and manual control. Automatic control is mesuaring nitogen variation in reactor by the control logic of PLC programming and it is most suitable methods of variable methanol introjection rate by each cycle. Aeration time and idle time was automatically controlled by nitrate concentration in reactor. As a result of pilot test in the study, average nitrogen removal rate was over 98% and methanol introjecting rate was 1.8∼2.2. A Cultivated microrganisms are verified by Genus Paracoccus, Genus Thibacillus, Genus Achromobacter. Dominant rate in SBR reactor is revealed over 90%. The toxic of chromate could be buffered but It has low buffer ability for peroxide of hydrogen.
주현종 경기대학교 부설 산업기술종합연구소 1997 산업기술종합연구소 논문집 Vol.13 No.-
SBR을 사용하는 생물학적 3차처리 공정에서 biomass의 활성도를 직접 측정할 수 있는 SOUR 반응기를 이용하여 비산소 소비율을 자동측정하였다. 활성슬럿지에 의해 소모되는 산소의 양과 제한적으로 공급되는 기질과 직접적인 관계가 있음이 관찰되었으며, 최대 SOUR 값이 클수록, 최대값과 최소값의 차이가 클수록 처리효율이 향상되었다. 최대 SOUR 값을 기준으로 8~10mg O/g MLVSS/hr 이상에서 처리효율 85% 이상, 최대와 최소와의 차 5 mg O/g MLVSS/hr에서 만족할 만한 처리효율을 기대할 수 있었다. 또한 SBR의 탈질에 필요한 1차 폭기와 2차 폭기의 기질 농도배분에 SOUR의 이용가능성이 검토 되었고, 기존의 SBR운영이 일정한 폭기와 무산소의 순환주기를 사용하는데 반하여, SOUR의 자동측정에 의한 순환주기의 자동조절과 경제적이며 효율적인 운전이 가능할 것으로 검토되었다. Specific oxygen uptake rate has been measured using an automated SOUR reactor which may be used to measure the activity of biomass in SBR of tertiary treatment. It could be observed the direct relationship between the amount of oxygen utilized by biomass and the limited condition of substrate concentration in the reactor. With the biomass of higher maximum SOUR value and more discrepancy between the maximum and minimum of SOUR value in SBR, better treatment efficiency could be attained. Also the possibility of utilization of automatic SOUR measurement for the substrate distribution between the primary aeration for organic removal and the secondary aeration for the denitrificaton in SBR has been studied. Instead of operating by conventional technique of a designated timed cyclic variation of aeration and anoxic reaction, for more economic and efficient operation, it was configured that automated cyclic distribution of reactions could be applied with the help of on line SOUR measurement.
주현종 경기대학교 부설 산업기술종합연구소 2002 산업기술종합연구소 논문집 Vol.23 No.-
Stringent effluent requirements necessitate expert approach in retrofitting activated sludge system for nitrogen removal of leather wastewater. Therefore, a two-stage intermittently aerated process was evaluated for retrofitting of biological leather wastewater treatment in this study. The experiments were performed using lab-scale reactor working volume of 300L. The COD_cr and T-N concentrations in the influent were high as 1.567 and 200mg/L, respectively. This experiments have shown that COD_cr removals in the range of 72.1 to 95.1% are possible for investigated wastewaters. T-N removals were in the range of 82.6 to 93.1% for the pilot-scale treatment studies. The study has demonstrated that two-stage intermittently aerated process are viable options of nitrogen removal for leather wastewater.