• Journal of environmental and Sanitary engineering
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• v.16 no.3
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• pp.61-61
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• 2001

• 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.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 $32.9{\;}{\ell}/hr{\cdot}m^{2}$.

• Korean Journal of Health Education and Promotion
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• v.15 no.1
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• pp.79-95
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• 1998

The purpose of this study was to investigate the sanitation affairs of general restaurants. The questionnaire survey on the attitude and knowledge toward sanitation, the attitude for sanitary administration and the sanitary education was conducted against new 600 restaurateurs who were educated from June 20 to July 11, 1996, at the administration hall's division of Kyungsangbook-do in charge of food industry that offered regular sanitary education to new restaurateurs annually. And the visit survey on sanitary practice was also conducted over 93 restaurateurs who obtained the commercial license for food service business. The findings from the survey were as follows; In regard to food sanitation, some 87.1 to 88.3% got the right knowledge about the reason and precaution of food poisoning, food's frozen or cold-storage, and the disposal of products after expiration of validity term. But it was about 20.8% to 50.0% who knew right about major precaution, storage temperature in refrigerator, fermented milk product's storage temperature and validity term. There was therefore a necessity for education in food sanitation. 38.2% of the subjects placed an emphasis on sanitary storage of foodstuffs as the most important thing in sanitary management. 33.8% emphasized cooking sanitation. The environmental sanitation was counted as the most important thing by 19.2%, and personal sanitation of worker was counted by 8.8%. There was differences in what they thought the most important thing was, according to the respondent's educational level and cooker. 86.6% replied it necessary to improve the sanitary level. The respondents who were younger or had better educational level emphasized more the need for it. Concerning health examination, 90.2% replied it necessary. 81.4% answered the reason was because there was a potentiality Quests might be infected with contagious disease. 78.5% pointed the need for sanitary education, but respondents with higher educational level less emphasized its needs. As the reason for poor sanitation, restaurateur's poor awareness about it was most frequently pointed out, by 46.9%. Cooking sanitation was most frequently counted, by 38.5%, as the first thing to be improved. As the most critical point in sanitary education, 34.5% indicated food's sanitary Quality control 30.9% mentioned sanitary treatment of kitchen facilities and peripheral environment, and 27.1% emphasized the summary of the general food sanitation. 77.7% answered to correct immediately in case of violating the Food Hygiene Law, and 12.0% replied to correct in the same case if they would get the order from public official or administrative action would be taken. Respondents with higher educational level answered more to correct immediately. What they wanted the government office to do toward sanitary improvement was a fund aid an facilities and management which was pointed out by 38.9%, a periodical sanitary education by 26.3% and a on-the-spot guidance of sanitary officials by 22.3%. In view of the food service business's sanitary practice, the rate of wearing a sanitary clothes was 32.9% in city and 35.0% in county. The rate of hand-washing without soap or non-washing at cooking was 73.9%, 85%, respectively. The rate of personnel sanitation was 34.2% in city and 50.0% in county. These things indicated the sanitation was not well practiced. To improve the poor sanitary conditions of the food service businesses, it is recommended to offer institutional backing and financial aid from administrative office, and encourage restaurateurs to take pride in their job. and conduct the sanitary education effectively by sanitary education institution.

• Journal of environmental and Sanitary engineering
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• v.15 no.1
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• pp.109-115
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• 2000

This study was designed to investigate the quality of the simplified water supplies by regional groups in Uijoungbu. For this objective physicochemistric and microbiological experiment were performed. Simplified water in Uijoungbu(Howondong Darakwon, Singokdong Chudong, Songsandong Mangadae, Songsandong Gacbawe, Songsandong Gusungmal, Songsandong Baebul, Ganeung3dong) tested by this study physicochemistric elements suited the test. However, Songsandong Mangadae exceeded the minimum level suggested as $NO_3-N(10mg/{\ell})$. The population of general bacteria were exceeded the minimum level suggested as drinkable water(less than $100CFU/m{\ell}$). Some simplified water in Uijoungbu were proven to be contaminated.

• Journal of environmental and Sanitary engineering
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• v.18 no.1
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• pp.1-7
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• 2003

There are lots of waterborne diseases which are caused by pathogenic microorganisms disseminated in contaminated environment. The purpose of this study is to investigate the status of water qualify and in order to investigate the sanitary condition of water purifier in northern part of Gyeonggi-do. We analyzed pathogenic microorganisms and 44 items of drinking water criteria from April to July in 2002. The results were as follows. 1. In 774 samples of water purifier, Pathogenic bacteria(salmonella, E coli O-157, O-26, O-111, shigella, pseudomonas etc.) were not isolated and total coliforms not detected. 2. About 76.5% of the water with purifier are found to be appropriated to the drinking water quality criteria. but 182 samples(23.5%) were without limits of drinking water criteria. 3. In the microbiological examination, 774 samples of purified water showed that 169 samples(21.9%) exceed the range of recommended limits(100 $CFU/m{\ell}$) to the total viable bacterial counts by pour plate method.

• Journal of environmental and Sanitary engineering
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• v.23 no.4
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• pp.13-21
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• 2008

With the rise in membrane applications, residuals management has become a growing challenge for membrane system. The primary residuals of MF/UF (microfiltration/ultrafiltration) system results from the wastes generated during backwashing. Many regulatory agencies, utilities, and water process engineers are unfamiliar with the characteristics and methods for treatment and disposal of membrane residuals. Therefore, this study was performed to investigate the backwash residuals water quality from the pressurized system with and without pre-coagulation, and to suggest approaches for the backwash residuals treatment. Pressurized MF system was installed at Guui water intake pumping station and operated with raw water taken from the Han River. We compared performances with and without the recycling backwash residuals at flux conditions, 50 LMH and 90 LMH with and without pre-treatment (coagulation). Based on the results, recycling of backwash residuals in pressurized system with pre-coagulation showed applicability of backwash residuals managements. Moreover, the recovery rate also increased up to over 99%.

• Journal of environmental and Sanitary engineering
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• v.22 no.4
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• pp.87-104
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• 2007

The objective of this study is to estimate the load of pollutants caused from the forest area among non-point pollutants within the Juam lake. The surveyed forest area was classified into broad-leaved, conifer, mixed and herbage area by forest tree type. Water quality and flux were investigated under rainfall and non-rainfall, respectively. Then, pollutant loading was evaluated by using the values of unit pollutant loading factor of each point and area of forest zone. Water quality analysis results of runoff by forest tree types were as follows. - Annual BOD, $COD_{Mn}\;and\;COD_{Cr}$ concentration of runoff in conifer area was high, and particle and biological recalcitrant compounds were flowed highly. - SS, T-N and T-P concentration was high in runoff from broad-leaved area, and biological degradable compounds was flowed. - Water quality of water from valley was maintained good under non-rainfall and could be utilized as fresh drinking water. Through water quality standard investigation, a countermeasure establishment was necessary to secure a good quality of drinking water - BOD, $COD_{Mn},\;and\;COD_{Cr}$ concentration of Bo-sung river was higher 1.5 times than other 2 streams, and because of high T-N, and T-P concentration in Songgwang stream, the management for this was necessary.

• Proceedings of the Korean Sanitation Conference
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• 2006.11a
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• pp.43-56
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• 2006

• Proceedings of the Korean Society for Quality Management Conference
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• 2004.04a
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• pp.484-489
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• 2004

The purpose of this study is to examine the success factor of Quality Management (QM) in the manufacturing conditions aspect of medium and small-sized sanitary enterprise. The requisite for manufacturing factors are classified into manufacturing human factors (the number of production employee, training and teaching, discuss on quality, manufacture expertness, etc.), manufacturing facility factors (coating, hardening, and molding equipment), manufacturing core component factors (temperature and viscosity, line, surface). And the indicator of quality outcomes are measured by reorder and recommendation to others.