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- 저자 : 서인석 ( In Seok Seo ) (검색결과 222 건)
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간헐포기 형태의 활성슬러지 공정에서 질소 , 인 및 pH , ORP 의 거동에 관한 연구
서인석(In Seok Seo),김병군(Byong Goon Kim),박승국(Seung Kook Park) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.1
In this research, 5 types of intermittently aerated activated sludge system were operated for nitrogen and phosphorus removal in wastewater. Also, pH and ORP (Oxidation-reduction potential) behaviour was evaluated as a control parameter for nitrogen removal. Nitrogen and phosphorus removal efficiency is strongly dependent on COD/TN ratio of influent The behaviour of nitrogen concentration and ORP values during a aeration-nonaeration cycle is described by a typical profile with 3 bending points. Also, pH raised at nonaeration state and decreased at aeration state. From analysis of ORP or pH slope ( ΔORP/ Δt or ΔpH/ Δt), ORP was more critical at endpoint of denitrification than pH. As a results, ORP pattern is more useful than pH as a control method in intermittently aerated activated sludge system.
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서인석(Seo In Seok),권기헌(Kwon Gi Heon),이동규(Lee Dong Kyu) 한국부패학회 2009 한국부패학회보 Vol.14 No.4
This study as follows to propose the problem decreasing corruption is suggesting as core issue in global dimension without developed or non-developed nations. This is because corruptions are not only between a sort of deviation and problem creating non-developed countries but also problem relating to govern every nation involving developed countries(yuen, 2002: 72). That is, national corruptions decrease national reliability, which is able to between give unreliability about nation and low nation capability to a people. In this context, this paper is focusing on research related to Nation's Competitiveness influenced by nation's corruption. A certain corruption influences a specific nation, which is significant applications. Moreover, specific corruptions embeds national contexts(or social contexts). This study will look for, firstly, Developed counties type has appeared statistically significant interaction term variables, which was both education corruption and parliament corruption. Secondly, South American countries type has emerged statistically significant interaction term variable, which was police corruption. Finally, East Asia countries type has occurred interaction term variable, which was NGO corruption. As a result, research results are match to Peter Evans(1985: 191)'s "state autonomy", which is theoretical conceptions discussed as Predatory Autonomy, Third Autonomy, and Embedded Autonomy. Just, Predatory Autonomy is not considered to my research because samples of Africa countries involved to Predatory Autonomy are deficient.
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서인석(In Seok Seo),김병군(Byung Goon Kim),박승국(Seung Kook Park),권선웅(Sun Woong Kwon) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.4
Intermittently aerated activated sludge process was applied as a water reuse process of 70 ㎥ /day for the upgrade of organic, nitrogen and phosphorus removal efficiency and clarifier performance. After application of the intermittently aeration, removal efficiency of BOD, SS, T-N and T-P were achieved 95%, 90%, 80% and 60%, respectively. Removal efficiencies in intermittently aerated process were considerably increased, comparing to those of continuously aerated activated sludge process. Also sludge rising problem in clarifier was improved. Average concentration of supplied reusing water were BOD 5 ㎎/L, turbidity 4 NTU and after chlorination, residual chlorine 0.4 ㎎/L, coliform 0 MPN/100mL. Intermittently aerated activated sludge process could be one of the best alternative process for the retrofit of conventional activated sludge process for the removal of nutrient in water reuse system.
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