• Journal of Food Hygiene and Safety
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• v.3 no.3
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• pp.117-129
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• 1988

Packaged meal manufacturing establishments in Seoul city and Kyungkido province were assessed in terms of the sanitary conditions and practices, time and temperature, and microbiological quality. Sanitary check-lists were developed to evaluate the sanitary condition of sampled packaged meal manufacturing establishments. Microbiological tests on.food containers, equipments, and foods in various phases of product flow were done. The results of the study are summarized as follows; 1) Sanitary condition of kitchen.and sanitary practices of employees in.large and medium establishments were evaluated as the some improvement required in order to meet all standards. But sanitary practices of employees in small establishments were evaluated as the unsatisfactory state with negligence or ignorance of safe practice. 2) The microbiological quality of basic ingredients and food materials after pre-preparation were poor. 3) Time and temperature data indicated that phases of holding ingredients at room temperature after cooking, assembly and packaging before delivery were critical. 4) Microbiological test results for food containers, equipments indicated that sanitary conditions of stainless steel ware, knife, wiping clothes and cutting board should be improved promptly. 5) Critical control points identified were ingredients, pre-preparation, Holding, and assembly and packaging. 6) Guidelines were suggested for effective quality control of packaged meals production.

• Journal of radiological science and technology
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• v.27 no.3
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• pp.51-58
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• 2004

The gel, which is stained on probe after ultrasonography, is a good circumstances for proliferation of microbe. This study is to investigate into the actual state of sanitary management, recognition degree and infection level of ultrasonographic probes. We had performed a question with telephone to 42 hospitals in Seoul area from December in 2003. We also cultured to obtained a sample from three ultrasonographic units to investigate infection level of the probes. Sanitary management of the probes was performed in 21 hospitals with alcohol cotton. Sanitary management was performed daily in 14 hospitals. Most hospitals used cotton towel for clearing of gel stained on probes. Preventive management against infection was performed in 32 hospitals with vinyl cover, surgical glove, or alcohol sterilization etc. In the recognition degree on infection, the response that using method of ultrasonographic probes is insanitary were in 78.6%(33 hospitals), and 54.8%(23 hospitals) responded that bacteria can be infected through the probes. In the results of germiculture, bacteria and fungi were detected too number of to count, but escherichia coli was not detected. In conclusion, The gel stained on probe after ultrasonography must be cleared completely, and it is necessary that change of recognition on sanitary management.

• Journal of environmental and Sanitary engineering
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• v.14 no.4
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• pp.9-20
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• 1999

This paper studies regarding the problems of transmitting disease through food and its prevention in terms of current problematic food poisoning and the transfer of bacterial disease while providing lunch for school children. As the problems of school lunch program, the number of food poisoning and of the transfer of bacterial disease is highly increasing because of the shortcomings of systematic safety management toward food and of the lack of meal supplier's awareness about sanitation.For the prevention the following suggestions are provided:1. It is necessary to shift from the system of meal supply for nutrition to that of meal supply for health. 2. A system that offers a responsibility for nutrition to that of meal supply to a person in charge of hygienist, or a cook, including the a nutritionist, is needed. 3. It is necessary to gain the help from the department of sanitation in city or country for the sanitation guidance and inspection of school meal supply, not to totally rely on the local ministry of education. 4. A manager or employees related to school/group meal supply need to get education constantly on sanitation and public information. 5. For the long term, a systematic sanitary management needs to be accomplished by introducing HACCP system.

• Journal of environmental and Sanitary engineering
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• v.24 no.4
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• pp.80-89
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• 2009

In the organic waste, food waste is the most difficult controls. In the study, food waste was treatmented to removal only the dockage. To decrease the hydrogen sulfide($H_2S$) in the produced biogas, iron chloride put in the anaerobic digester. Respectively treatment quantity of the food waste, content of the methane($CH_4S$) gas in the biogas, produced gases quantity, put in the quantity of the Iron chloride, pH, TS, Alkalinity, VFA, Ammonia. The results obtained from the experiment are as follows: 1. The produced biogases quantity/the treatment quantity of the food waste was $83.82{\sim}129.41m^3/ton$. 2. The content of the hydrogen sulfide($H_2S$) in the produced biogas is below of the 500ppm. The iron chloride put in the anaerobic digester. 200~300kg of the iron chloride put in the anaerobic digester at the steady-state. 400~850kg of the iron chloride put in the anaerobic digester at the unsteady-state. 3. Factor of the operator was the pH: 7.7~8.4, content of mathane: 55~65%. 4. TS(total solid) of the digestor sludge was 17~20%, Alkalinity was 38,500~41,750ppm, VFA(Volatile Fatty Acids) was 2,800~2,420ppm, Ammonia was 4,300~3,650ppm.

• Journal of environmental and Sanitary engineering
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• v.16 no.2
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• pp.79-90
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• 2001

Commercial liquid seeds are used for supplying active microbial flora to organic wastewater treatment plants of high feed-to-microorganism ratio and to maintain optimal microbial condition during unsteady state operation of the biological wastewater treatment plant. In addition to bacterial cells, the liquid weeds contain various additives for special purposes as well as organic substrates for energy supply. The additives give physical stability for the maintenance of microbial decomposition activity and ability to control the overgrowth of seed strains. In this work, the effects of addition of two kinds of typical substrate additives, poly aluminum chloride(PAC) and poly aluminum sulfate(PAS) on the consitutional total cell counts(CFU/ml) of four kinds of reorganization liquid seeds(RLS I, RLS II, RLS III and RLS IV) were studied experimentally. The addition of PAC and PAS gave negative effect on TCC constitution for the four seeds studied.

• Journal of environmental and Sanitary engineering
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• v.18 no.3 s.49
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• pp.64-68
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• 2003

Measurement of dried deposition for air pollutant was investigated in Gwang-ju Health college area for a year. The average value of air pollutants was investigated three times a month. Measured heavy metals and concentration of mass are not corelated. Heavy metals were thrown up air as state of large particles and they were moved by wind. Deposition of heavy metals and deposition velocities were high in the order of Fe > n > Cu > Pb > Cr and Pb > Fe > Cr > Zn > Cu, respectively. The pattems of deposition velocity of heavy metals for a year were much the same as each other except that Pb is faster than others.

• Journal of environmental and Sanitary engineering
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• v.15 no.2
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• pp.85-94
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• 2000

The comparative evaluation is the most effective method for site selection because the selection of waste treatment facility is to determine the optimum site out of limited candidate sites. This study adopted the ordinal scale evaluation, one of methods of comparative evaluation. The ordinal scale evaluation aims to determine the investigating items referring to the character of sites, to determine the importance factors for investigating items, and to determine the optimum site according to the quantitative evaluation. This study has focussed on reflecting the opinion of residents to the maximum extent with a weight on social and economic aspects, considering the state of confrontation against each other between the autonomous government organization and local residents, which is being emerged as a social issue relating to the evaluation rating on each item of site selection of an optimum site. Therefore, rational, and clear validity investigations and proper reduction of both time and expenses in site selection as well through this a study.

• Journal of environmental and Sanitary engineering
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• v.21 no.2 s.60
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• pp.1-10
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• 2006

Codonopsis pilosula and Adenophora triphylla were cultivated by sawing seeds, but the germination rate were low. To cultivate these two wild plants was very difficult. The marketable roots of the plants had low quality. The plant pathogens were very difficulty to prevent the diseases (Rhizoctonia, Pythium, Fusarium, Erwinia, Botrytis, Phythophthora) appeared in cultural state. For the extermination of the disease needs a lot of agricultural chemicals, the effect of remain behind an insecticides was high of a hazardous rate after harvest. On this studies, for the safe prevention of the diseases and the promote of seeds germination, we used Bacillus subtilis, B. liquefaciens, Paenibacillus polymixa, Pseudomonas putida separated in our research, these results would bring us harmless products of medicinal herbs for human.

• Journal of environmental and Sanitary engineering
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• v.12 no.1
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• pp.15-23
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• 1997

The anionic exchange resins with the Dowex-1 and Amberlite CG-400 form were transformed into resin of sulfate and acetate acid form, respectively. The uranyl complex ions with SO$_{4}$$^{2-}$ and CH$_{3}$COO$^{-}$ were adsorbed on the anion exchange resion mentioned above, and these complex ions were eluted as mixture eluents of 0.7M HNO$_{3}$ - 0.5M NH$_{4}$NO$_{3}$ by anion exchange chromatography. The optimum adsorption conditions of uranyl anion complex ions adsorbed on the upper of the resin colmun were 1.5-2.0 ml/min of flow rates at pH 2.0 and adsorptive power of uranyl complex ion of sulfuric acid type were nearly consistent with the Caussion normal distribution curve, whereas the elution state of UO$_{2}$(Ac)$_{2}$$^{4-}$ with acetic acid type was departed. The weighing form obtained from resin of sulfuric acid and aceric acid type was U$_{3}$O$_{8}$ whose recovery was 91.7%. The possibility of recovering uranium from the monazite sulfate solution using a strong base anion resin, Amberlite CG-400(sulfate form), was successfully recovered more than 90%.

• Journal of environmental and Sanitary engineering
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• v.13 no.1
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• pp.26-31
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• 1998

Removal of nitrogen and phosphate in wastewater is concerned to important for the prevention of eutrophication in receiving water and lake. Conventional activated sludge system designed for organics removal can be retrofitted only by modification of aeration basin to maintain anaerobic and aerobic state. Biological nutrient removal processes(BNR) such as Bardenpho, A$^{2}$/O, UCT, VIP were generally used for the treatment of wastewater. However these BNR processes used in large scale WWTP were not suitable in small scale WWTP(i.e., package type WWTP) due to relatively large fluctuation of flow rate and concentration of pollutants. The purpose of this research was to develop the compact, effective and economical package type WWTP for the removals of carbon and nitrogen in small scale wastewater. Intermittently aerated activated sludge system (IADFAS) were investigated for removal of nitrogen in both domestic wastewater, Bardenpho process was also evaluated. Nitrogen removal of IAAS, IADFAS, Bardenpho were 75, 77 and 67%, respectively.