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윤철종,박정호,임찬섭,박승조 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.2
This study was on the removal of silver ion containing photographic wastewater by BPBE cell. The experiments were performed at different voltage. electrolytic time and pH. When we inverstigated with silver removal efficiency, current efficiency and power efficiency at pH 4, 7, 9, thoese were indicatec most superior values in pH 9. And for the conditions of pH 9, l000mg-Ag/L, 3V, thoese were 93%. 40.4%, 0.54g-Ag/W .hr respectively.
김성완,윤철종,최성우,김성우,우성훈,신남철,박승조 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.2
We have investigated a performance of bio-electrode reactor for removal of nutrient like a nitrogen, phosphorus and organic substrate. Lab scale of bio-electrode reactor was operated with synthetic and tannery wastewater. Iron bar and stainless steel used for anode and cathode respectively. In experiment with synthetic wastewater, we were able to obtain the optimal current density range of 2.4-40 mA/dm² after 48 hrs operating time. And in that experiment, about 70~73% of ammonia nitrogen and 54~64% of phosphorus were removed. In experiment with tannery wastewater at 2.4-4.0 mA/dm², the removal rate of ammonia nitrogen, phosphorus and organic substract were about 62-69%, 45~59% and beyond 79% respectively.
진양오,윤철종,우성훈,최성우,김익성,박승조 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.1
The objective of this study were to treat waste paper with waste acid and alkali so to enhance maturity of the wastes. The sample was office paper and news paper which ratio was 1:1 and the reagents for pre-treatment were sulfuric acid and sodium hydroxide for waste acid and alkali. The maturity indices were taken volatile solid. cation exchange capacity, and gas production variation. The pre-treatment method was to dip the sample in the reagent according to time, concentration, and dosage. The methods of treatment were to dip the wastes in leachate and to landfill in soil. The result of this study were as follow. When waste paper was treated by acid and alkali, the proper treatment condition was 24hours and 0.1 normality of acid and alkali. The pre-treated samples with acid and alkali such as RSN and RSH were more effective in maturity than non-treated sample such as RS. The post-treated sample such as RSL, RSNL, and RSHL was more effective than nonpost-treated sample such as RS, RSN, and RSH.
최성우,우성훈,윤철종,곽명화,서향미,박승조 동아대학교 환경문제연구소 2000 硏究報告 Vol.23 No.1
This study has carried out the coagulation tests for tannery wastewater including high-level suspended solids and organic matters to determine the optimum pH and coagulant dosage and to characterize several coagulants for coagulation. In case of optimum pH range test, we know that multi-coagulants are not only cost-effective but also applicable from acidic pH range to alkaline pH range widely, while single-coagulant are useful in limited pH range. Removal efficiency for using of the multi-coagulants appeared more efficient than that of single-coagulant. Especially, sulfates(alum-ferric sulfate : AFS & alum-magnesium sulfate : AMS) are more effective than chlorides (alum-ferric chloride : AFC & alum-magnesium chloride AMC). In comparison of residual turbidity related to settling time between alum and alum-ferric sulfate-magnesium sulfate(AFM), it took to 40 minutes using of alum but 5 minutes using of alum-ferric sulfate-magnesium sulfate(AFM) until constant residual turbidity are reached.
유재현,박승조,윤철중 東亞大學校 1999 東亞論叢 Vol.36 No.-
This study is the removal of nitrogen in the tannery wastewater by modified intermittent aeration process. The experiment was performed with the tannery wastewater of J industry complex located in Pusan. The reactor volume used for experiment was 114.24l as pilot scale. The performance of this process was evaluated by variation of wastewater temperature with 30, 20, 15℃. On operating with wastewater at 30℃ the removal rate of total nitrogen and NH₃-nitrogen were about 93% and 98% respectively. NO₂-nitrogen and NO₃-nitrogen were contained with 20~30mg/L in intermittent and nitrification reactor but those were reduced with 10mg/L in effluent by denitrification bacteria. By the way on operating with wastewater at 20℃ and 15℃ the removal rate of total nitrogen was 97%, 95% respectively. Because of change of operating condition it was prevented the reduction of activity of microorganism temperature down.
최성우,이봉섭,곽명화,윤철종,박승조 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.2
Chromium occurs naturally in the earth's crust as well as in air, surface, and ground water. However, chromium is released to the environment in much larger amounts as a result of human activities. Hexavalent chromium, Cr(Ⅵ), is very soluble in water in natural environment and very toxic, carcinogenic, and mutagenic in animal and man. On the other hand trivalent chromium, Cr(Ⅲ), is less toxic and less soluble and thus is a lesser problem. This study has been carried out in order to reduce toxicity of Cr(Ⅵ) by an Escherichia coli strain. After adding E. Coli., the results were obtained from concentration of total Cr, Cr(Ⅵ). Cr(Ⅲ), pH, turbidity, and VSS in aerobic condition was summarized as follows : After 48hr aerobic condition in experiment of synthetic wastewater, the reduction rate of Cr(Ⅵ) was 20%. Also, the reduction rate of Cr(Ⅵ) was 60% in experiment of raw wastewater.
부산지역 일부 약수터에 대한 ‘맛있고 건강한 물’의 지표 적용
김현실,김익성,박청길,곽명화,윤철종,박승조 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.2
This study was performed to investigate the water quality of some natural mineral springs in Busan. Samples for this study were collected at fifty sites during a year. from March 2000 to February 2001. The overall tendency of mineral was Na>Ca>Mg>K, and the seasonal variation of each components were like this - Ca: Win>Spr>Sum>Aut, Mg: Spr>Win>Sum>Aut, Na: Sum>Aut> Spr>Win, K: Aut>Sum>Spr>Win The K and O index suggested by Hashimoto was followed : delicious water(58%) > not belong to any group(34%) > healthy and delicious water(6%) > healthy water(2%).