• Journal of environmental and Sanitary engineering
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• v.10 no.2
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• pp.30-35
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• 1995

In this research effect of physicochemical parameter on flocculation using PASS-100 were evaluated. pEt flocculant dosage, mixing intensity and detention time were adopted as experimental variables. The physicochemical parameter( p% mixing intensity and mixing time ) were important Parameter on flocculation performance. Effluent pH range for effective flocculation was 4.5-7. Optimum Gt$_{d}$ range was 20,000-30,000 and its range similar to alum flucculation. Rapid mixing was very important parameter to floe formation in PASS- 100 flocculation. Whereas, slow mixing did not affect to the removal efficiency at settling time for 30minute or more.

• Journal of environmental and Sanitary engineering
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• v.10 no.2
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• pp.67-73
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• 1995

In order to study of characteristics of collected filter as analysis of carbon in airborne particulate matters by Elemental Analyzer, quartz fiber filter and glass fiber filter were used. The results are followed as; There was no difference of confidence in collection rate of airborne particulate matters between quartz fiber filter and glass fiber filter. Airborne particulate matters were collected on both filters evenly and the use of quartz fiber filter is better than glass fiber filter as analysis of carbon by thermal method.

• Journal of the korean veterinary medical association
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• v.7 no.1
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• pp.4-11
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• 1963

During the period starting November 8th to 26th, 1960, 160 restaurunts located in Seoul area were inspected with special emphasis on the sanitary aspect of food and environment of each restaurant. The inspection was concerned with bacteriological test for

• Journal of environmental and Sanitary engineering
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• v.12 no.2
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• pp.13-21
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• 1997

The effect of upflow velocity on size distribution and activity of granular sludge was studied in laboratory-scale Expended Granular Sludge Bed(EGSB) reactor fed with non-fat dry milk and sucrose as sole carbon and energy source. High upflow velocity advanced size and activity of granular sludge by distribution and floatation of granular sludge. Therefore, the reactor operation of an apt upflow velocity was needed and an apt upflow velocity in this experimental was estimated to 1-10m/hr.

• Journal of environmental and Sanitary engineering
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• v.12 no.3
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• pp.121-126
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• 1997

Carbochlorination of fly ash with phosgene and mixture CO, $Cl_{2}$ were investigated. The results obtained with pure chlorine, and/or chlorination mixtures were presented.

• Journal of environmental and Sanitary engineering
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• v.12 no.3
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• pp.111-119
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• 1997

We met the continued population growth, contamination of both surface and groundwaters, deficiency of water resources, and increase of water demand. Wastewater reclamation and reusing system are important facilities in water resources planning aspect. The required water quality for reclamed wastewater varies with each application. This study was conducted to examine the possibilities of the wastewater reclamation and reusing on milk manufacturing wastewater. Biofiltration could reduce the COD$_{Cr}$, NH$_{3}$-N. Turbidty was reduced highly by coagulation. In conclusion, we identified the possibilities of wastewater reclamation and reusing on milk manufacturing wastewater's by biological activated carbon filter.

• Journal of environmental and Sanitary engineering
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• v.11 no.3
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• pp.37-46
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• 1996

In this study, the effect of pH, Temp, dye concentration, distance of electrode, and the potential on the removal efficiency of dye-wastewater using electrochemical reaction were investigated. Optimum conditions for the electrochemical treatment of dye-wastewater were obtained that pH;7, 8V, electrode distance; 1cm and the reaction time for obtaining above 99% removal efficiency were 10 - 40min at each conditions, From this result, we can determine the instantaneous current efficiency and specific energy consumption, and we can provide the effective data for economical treatment of industrial dye-wastewater.

• Journal of environmental and Sanitary engineering
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• v.12 no.3
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• pp.81-86
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• 1997

In case of Industrial Wastewater, It was various pollutions, high concentration and different physical, chemical properties each other in accordance with classification of wastewater. Therefore, after inquiring into the influence on the membrane of the dissolved pollutants, we should select the membrane of best efficient quality. As results of experiments on pilot plant test, optimum operating pressure for fouling removal was 34BAR, when continues operating was 34 BAR, recovery rate was 75% and permeate water flux was $32.9{\;}{\ell}/hr{\cdot}m^{2}$.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.20 no.1
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• pp.1-14
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• 1991

건축설비공사(建築設備工事) 표준시방서(標準示方書) (기계부문(機械部門))은 1980년(年)에 제정(制定)되었으나 그동안 개정(改正)의 기회가 없었다. 금회 개정(改正)에서는 과거 기준중(基準中)의 불합리(不合理)한 부분(部分)과 신공법(新工法)의 출현이나, 법규(法規) 등의 변화에 따른 내용을 포함하여 개편되었으며, 특히 가스설비공사에 해당하는 부분을 삭제(削除)하고, 설비공사(設備工事)범위에 해당되는 부분에 국한하였다.

• Proceedings of the Korean Sanitation Conference
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• 2003.06a
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• pp.131-142
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• 2003