• Journal of environmental and Sanitary engineering
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• v.17 no.4
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• pp.1-9
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• 2002

In order to define about concern with discharge and water-quality, it is calculated drought flow, low flow, normal flow and wet flow in Chungju watershed from flow duration analysis. Water quality modeling study is performed for forecasting at upstream of Chungju lake. It is devided method of modeling into before and after the equipment of environmental treatment institution. And it is estimated the change of water quality. Before the equipment of environmental treatment, BOD concentration is increased from 23000 to 2006 years at all site and decrease on 2012 years. The rate of increasing BOD concentration is showed height between 2000 years and 2003 years most of all site. And after the equipment of environmental treatment, it is showed first grade of BOD water quality in most of sample site beside Jucheon river. The result of water quality modeling using drought flow showed that a lot of pollution occurred. And water quality using wet flow is good, so much discharge make more improve water quality than little discharge.

• Journal of environmental and Sanitary engineering
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• v.10 no.1
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• pp.12-24
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• 1995

I tried to evaluate the reason of the monthly variation of water quality according to the hydrologic character of Pal- dang reservoir inflow variation. The result of this study is as below; 1 ) COD, BOD, Total- nitrogen and Total- phosphate concentration increase generally according to the flux and Total- phosphate concentration is the most affected item by flux. 2) COD, BOD, Total- nitrogen and Total- phosphate concentration increase according the flux, but they begin to decrease at the below point ; COD · 1,154 CMS, BOD : 1,007 (CMS cubicmeter per second ) and Inflow- Concentration interrelation formula is as below; table omitted.

• Journal of environmental and Sanitary engineering
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• v.5 no.2
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• pp.15-21
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• 1990

Current analyses of tap water in Seoul metropolitan area prove the water is still safe, despite the Pollution of raw water source. However, it also significantly suggests that a feasibility study of apply, additional advanced technology to existing water treatment processes is needed in order to cope with future pollution. Also, the monitoring of water quality within private, multi-household buildings is important as the monitoring of public water distribution system.

• Journal of environmental and Sanitary engineering
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• v.7 no.1
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• pp.35-44
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• 1992

This paper included the preventive measures and the prospect of lake eutrophication in korea. All pollution control techniques must be applied after the characteristics of the lakes are surveyed sufficlenty, Most of Korean lakes are the large man-made ones and their characteristics are different from those of natural ones in foreign nation. Some of many techniques for natural lakes can be applied in our lakes also, others must be revised. Lake water quality can be ameliorated only by systematic researches and technologies because lake ecosystem is very complicated. It is impossible to improve water quality with fragmentary and shortterm projects.

• Journal of environmental and Sanitary engineering
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• v.19 no.1
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• pp.42-49
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• 2004

The study was carried out in order to improve the quality of fermented soybean, that is, Doenjang with strain ,mold and bactea, added mulberry leaves powder were investigated and analyzed as follows. 1. The water content of samples was 38.51-50.10%, pH value 5.44-6.21 and total acidity, 2.42-3.13 2. The reducing sugar of content for samples was 7.01-7.24% on contrast mulberry added sample was 8.34-12.11%, Amino-N as contrast 5.96-7.63% mulberry added, 8.34-12.11% 3. In sensory evaluation test, excellent results was 2% added sample than others. 4. The heaby metals analyzed form samples cans, iron, tin and lead content of samples were 5.63-6.03 ppm, 31.70-35.53 ppm and trace.

• Journal of the Korean housing association
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• v.11 no.3
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• pp.125-136
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• 2000

The purpose of this study was to analyze water consumption in each apartment buildings influenced by several factors that are the income level of inhabitants, life style, the area apartments and climate. The automation of sanitary machines or facilities in recently built apartments has caused largely increases in amount of water consumption. Therefore, the design for water supply is very important for the maintenance of the optimum level or pressure of water supply. This study is based on the offer of basic data for improving the quality of water supply and employing the sanitary machines or sanitary facilities by analysis of amount increased of water consumption rapidly. Amount of water consumption data, the change in quality of entropy to the supply water pipe was analyzed and presented to indicate the necessary to basic materials for the design of an optimal water pipe.

• Journal of environmental and Sanitary engineering
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• v.15 no.1
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• pp.88-94
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• 2000

The purpose of this study was to analyze and compare the contents of minerals and ionic components in domestic commercial natural mineral waters, and to investigate the relationship between water quality and characteristics of suspended and rocks there of its source. All mineral waters tested in this study met the korean mineral water quality guideline, although chemical components varied widely depending upon the geological characteristics and degree of urbanization of the source area or physical water treatment method. The water quality of commercial bottled water was different from that of source water, especially in cationic components, and showed a tendency to become worse with time elapsed. The water quality on the bottle was also different from the measured quality.

• Proceedings of the SAREK Conference
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• 2008.06a
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• pp.569-574
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• 2008

Recently, the domestic remodeling market is increased in scale. This study is to develop the sanitary piping system which improves quality of life and facility performance when the aged public housing is remodeled. Above all, we found out three standard floor plans in bathrooms of the public housing. And then, the plan and section types of the sanitary piping system were developed for the on-floor piping, a construction cost of each section types was estimated to review the economical fact. Also, the field mock-up test was performed in the type of the pipe shaft with on-floor pit. In result, the developed sanitary piping system was available for the remodeling public housing without a great facility cost. Additionally, the sanitary pipe was replaced easily through the shaft and on-floor fit. And a noise was reduced to a lower unit when the water flowed down.

• Journal of environmental and Sanitary engineering
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• v.13 no.3
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• pp.128-132
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• 1998

In this study, water quality characteristics of lakes in the Seosan area are analyzed. Components water quality were analysed at 10 sampled points in each lakes, and the results were evaluated for seasonal variation. It was found that water quality was over II~III class. Most of lakes in the Seosan area which implies that are suitable as the maintenance water. The concenturation of T-N, T-P was observed IV~V class during all seasons. Particularly, T-N concenturation peaks in spring, while was lowered in other seasons. In the lake, high concenturation of T-N, T-P bring about Eutrophication when algae was growth causing various physico-chemical changes in the water. It is suggested that the water quality management strategies need to be applied for each lake.

• Journal of the Korean Dietetic Association
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• v.1 no.1
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• pp.43-53
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• 1995

The foodservice operation in SEVERANCE dietetic department was assessed to evaluate and improve the foodservice quality product in and served. The survey questionnaire consisted of the general background / its evaluation of quality / sanitary condition / patient's taste. The survey has been done since 1987. The following results are based on the survey done on the July second, 1994. It was done for every patient and the percentile of data collection was 80.8. All data were analyzed through Chi-square, t-test, ANOVA, Correlation, Multiple Regression(ENTER). The results are as follows 1. Patient's perception, variety in fooditems, food's temperture was not bad'. 2. The intake of meals was 60-65% for meat, 65-70% for vegetable, and 50-55% for kimchi. Bad appetite(30.2 %), poor displays of food( 13.2%), and lack of variety of fooditems were responsible for the residue. 3. Foodservice and sanitary condition were excellent. 4. The patient's demend for nutritional deucation was high though only a few(7.6%) were educated. 5. Patients' satisfaction with the department was significantly(p<0.001) different from that with other medical department. 6. Patient's satisfaction was influenced and determined by menu's variety, sanitary condition, age, length of stay and food's temperature.