• Journal of Korean Society of Water and Wastewater
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• v.19 no.4
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• pp.462-472
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• 2005

This study was carried out to suggest the plans for installation of rural sewage treatment facilities through the analysis of these facilities installed in Chungchongnam-do Province. About 5% of all installation was carried out by the department of wastewater and related environment problems and the other case was carried out by the department of construction or residence. In wastewater caused by 250 and 300 persons, facilities capacity do not exceed about $50m^3/d$, caused by 2,500 and 3,000 persons, $500m^3/d$. Advanced sewage treatment process were first needed in the discharge area where affected the water environment greatly. However, in carrying out the water quality pollutant of the total amount management system in the other areas, they should be driven only over the scale of pollutant quota object facilities standard. Rural sewage must be included in the special accounts according to the regulations of local government, and sewage treatment cost should be collected to manage. Installation type uses integrating joint treatment method in case the distance among villages is short or one treatment facility independently.

• Journal of Korean Society of Water and Wastewater
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• v.32 no.3
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• pp.269-277
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• 2018

Burials for the rapid disposal of carcasses have diverse and profound effects on the rural living condition, natural environment, and local economy throughout construction, management and final destruction of burials. In this study, possible residue excavated from standard burials, storage using FRP (Fiberglass Reinforced Plastic) tanks, and microbial-treated burials are characterized as carcasses, contaminated soil by leachate, and wasted plastic film. Treatment technologies for volume reduction of the residue including composting, rendering, and thermal hydrolysis were investigated. If the solid and liquid residues generated during volume reduction treatment are directly transferred to the environmental facilities, it may cause disorder due to high concentrations of organics, antibiotics, and lipid. Benefits and drawbacks of composting as a volume reduction techniques are extensively investigated. We also discussed that proper treatment of excavated soils and the reusing the treated soil as agricultural purpose. For the protection of public health and worker's hygiene, treatment criteria including produced residue qualities, and quality standards for the treated soil as agricultural use are required. In addition, Scientific manual for the proper treatment of residues is required. It is necessary to consider the establishment of a pretreatment facility to the occurrence of large-scale residue treatment.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2018.11a
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• pp.267-268
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• 2018

• Journal of Animal Environmental Science
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• v.20 no.1
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• pp.27-34
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• 2014

This study was conducted to survey and inspect the currently operating anaerobic digestion facilities for animal manure. Recently, the number of anaerobic digestion facility for livestock manure is on the rise thanks to growing interest in developing alternative energy. A anaerobic digestion system has been constructed in large scale farms or animal manure public resource center. Currently, most animal manure anaerobic digestion facilities in operation are producing biogas from the pig slurry which contains 97% water. Methane gas can be used to operate a engine generator which then produces electricity. Anaerobic digestate, a by-product of digestion, is mostly utilized as a liquid fertilizer after curing processing. Only in a few cases, it can be discharged after wastewater treatment process. The problem of anaerobic digestate treatment is the imbalance of C/N ratio. The content of N was too high to keep it into normal process.

• Journal of Korean Ophthalmic Optics Society
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• v.14 no.3
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• pp.75-81
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• 2009

Purpose: The purpose of this controlled study was to determine the effectiveness of vision therapy for accommodative infacility in children. Methods: 10 children 9 to 13 years of age with symptomatic accommodative infacility were divided into a treatment group (n=6) and a contol group (n=4). The treatment group received 12 weeks of vision therapy while the control group received nothing. Results: The visual symptom assessed by COVD-QOL score for the treatment group showed both statistically and clinically significant reduction from 27.50${\pm}$5.68 to 12.00${\pm}$7.24 (p<0.01). Also, there were statistically and clinically significant improvement in the clinical measures of monocular accommodative facility of right eye (from 0.67${\pm}$1.03 cpm to 15.42${\pm}$4.85 cpm; p<0.001) and binocular accommodative facility (from 0.33${\pm}$0.82 cpm to 13.92${\pm}$3.58 cpm; p<0.001). In contrast, there were no significant improvement in symptoms and in the clinical measures of monocular and binocular accommodative facility for the control group (p>0.05). Conclusion: Vision therapy is an effective mode of treatment in eliminating symptoms and improving accommodative facility in children with accommodative infacility.

• Journal of Korean Society of Water and Wastewater
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• v.32 no.4
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• pp.325-335
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• 2018

The annual total phosphorus load caused by public wastewater, nightsoil and livestock manure treatment facilities in Korea has been examined macroscopically. Annual domestic average phosphorus (P) inflows through the income of phosphate rock for the last five years (2012 - 2016) were analyzed as 76,598 tons/year. As of the year 2015, the total loadings of phosphorus attributed to public wastewater treatment facilities, nightsoil treatment facilities and livestock wastewater were estimated as 30,269 tons/year, 1,909 tons/year and 18,138 tons/year, respectively. Considering the amount of phosphorus imports, the annual phosphorus load from wastewater, livestock wastewater and excretions is equivalent to 39.5%, 23.7%, 2.5% and totally 65.7%(39.5% + 23.7% + 2.5%). Therefore, the introduction of phosphorus recovery and recycling processes for the public wastewater and livestock manure treatment facilities has been found to be effective because it could reduce the import amount of phosphate rock by up to 60% or more.

• Journal of Korean society of Dental Hygiene
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• v.10 no.5
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• pp.905-915
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• 2010

Objectives : This research identified the attitude towards senior citizens targeting the workers of the facility for senior citizens to establish Long-Term Care Insurance System early on, and to identify the degree of perception on the importance of senior citizens' oral health and on the need for dental sanitation specialists. Methods : This research targeted 233 workers of the facility for the senior citizens located in some parts of the Gyeongnam area. Survey was conducted from December 1, 2009 to January 31, 2010 to identify the facility workers' attitude towards senior citizens and on the perception towards Long-Term Care Insurance System. Results : 1. As for the awareness towards senior citizens, 50.2% said that they are comfortable around senior citizens while degree of kindness towards senior citizens was 48.5%. 21.0% had experienced training for senior citizens' oral health management. As for the question on who should serve as the trainer, dental sanitation specialists were citied the most with 47.6%. 29.2% was very interested in the senior citizens' oral health while 83.7% said that oral cavity managers are needed in the facility for the senior citizens. As for the question on who should be in charge, if necessary, dental sanitation specialist was cited the most with 57.9%. 2. Awareness on the Long-Term Care Insurance System, treatment for the oral cavity sanitation by visiting homes and information on the activity of long-term care specialists was high following the experience of training for the senior citizens' oral health management in case of the workers at the senior citizens' facility. This manifested statistically significant difference(p<0.05)(p<0.01). Moreover, treatment for oral cavity sanitation manifested statistically significant difference was manifested in the treatment for oral cavity sanitation following the need for oral health managers and who should be in charge, if necessary(p<0.01). Conclusions : These results advocate the need to develop diverse senior citizens' oral health management methods and to continue to carry out actions for senior citizens' oral health improvement that can be carried out by the long-term caretakers for the management of senior citizens' oral cavity health.

• Journal of Korean Society of Water and Wastewater
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• v.34 no.4
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• pp.239-250
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• 2020

In this study, effects of five raw water quality parameters (turbidity, odor compounds caused by algae, filter clogging caused by algae, pH increase caused by algae, and organic matter) on improvements and operations costs of typical water treatment plant (WTP) were estimated. The raw water quality parameters were assumed the worst possible conditions based on the past data and costs were subsequently estimated. Results showed that new water treatment facilities were needed, such as a selective intake system, an advanced water treatment processes, a dual media filter, a carbonation facility, and a re-chlorination facility depending on water quality. Furthermore, changes needed to be made in WTP operations, such as adding powered activated carbon, increasing the injection of chlorine, adding coagulation aid, increasing the discharge of backwashed water, and increasing the operation time of dewatering facilities. Such findings showed that to reliably produce high-quality tap water and reduce water treatment costs, continuous improvements to the quality of water sources are needed.

• KSBB Journal
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• v.28 no.2
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• pp.80-85
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• 2013

The bacterial community structure in a biological reactor fed influent from a wastewater treatment system was investigated by denaturing gradient gel electrophoresis (DGGE) and in situ hybridization. Sludges were collected from three biological reactors (aerobic, oxic, and anoxic tanks) at the M wastewater treatment facility (WTF). The influent of the MWTF consisted of mixed tannery wastewater (40~65%) and seafood wastewater (35~60%). The treatment processes resulted in a removal efficiency for BOD (biochemical oxygen demand) and COD (chemical oxygen demand) of 83.6~98.2% and 72.8~84.6%, respectively for tannery wastewater than for seafood wastewater resulted in greater survival of biomass in the biological reactors and a higher removal of BOD, COD, and T-N of about 8~18%. In contrast, addition of greater amounts of seafood wastewater decreased the amount of biomass in the bioreactors due to the increasing concentration of chromium from that wastewater and it also. The dominant bacterial species during the high seafood wastewater input period were Burkholderia cepacia (JX901049) and an uncultured bacterium (JF247555), while Pseudomonas geniculata (HQ256559) was dominant during the high tannery wastewater input period. Flavobacteriumsp. BF.107 (FM173271) and Hyphomicrobium zavarzinii (Y14306) were dominant under anoxic conditions.

• The Korean Journal of Ecology
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• v.16 no.1
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• pp.51-61
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• 1993

Crystal violet, a typical triphenylmenthane dye (N, N, N', N', N", N"-hexa methylparaosaniline), extensively used in textile dye, industry and research, has been suggested to cause tumor growth in botton-feeding fishes. For the isolation of crystal violet degrading bacteria, wastewaters were sampled from plants' wastewater treatment facility, textile treatment facility, textile wastewater treatment plant and etc.. The most efficient strain in crystal violet degrading bacteria was identified as Klebsiella oxytoca. Added sole carbon source in PAS minimal media was 10mg/l crystal violet, which incubated at 30。C, the degrading efficiency was maximum 12.3%. When fructose, glucose, sucrose and yeast-extract were added 0.01% in PAS media respectively, the degrading efficiency were all 96% within 24 hours.