마을하수도의 정비 및 효율적 관리방안

서규태,김응호 진주산업대학교 환경문제연구소 1998 環境硏究論文集 Vol.1 No.-

This paper is the result of a study conducted to provide a guide line for sewerage system construction and maintenance in small community. The Characteristics of small communities in Korea is that the residents are scattered in a large area. Therefore the sewerage system in such area is significantly different from that of the municipal sewerage facility. In this study, the wastewater facilities of such small community is defined as "Maeul Hasudo". Two types of treatment facilities could be considered. One is combined treatment using public sewer and the other is On-site treatment system for several households. The former is reliable for communities having 20 integrated residentes. On-site treatment is more economical for the sporadic residents in large area. Proper processes and effective management are suggested for the Maeul Hasudo by the type of treatment facilities in this study.

참지식 부직포여과 활성슬러지 시스템의 가정 오수처리 적용 타당성 조사 연구

임태진,서규태,이택순,문병현 7개 국립대학교 환경연구 논문집 공동발행 위원회 2002 환경연구논문집 Vol.2 No.1

An experimental study was conducted to investigate the applicability of non-woven fabric filter as an alternative separation material in membrane combined activated sludge process. The most advantage of the fabric filtration activated sludge system is the low operation and maintenance cost resulting from the ready available material and gravity filteration. The system was consisted of two reactors, anoxic and aerobic one with working volume of 0.28㎥ and 0.47㎥, respectively. The non-woven fabric filter module was immersed in the aerobic compartment for separation of activated sludge by gravity filtration. Although the system showed high potential to treat domestic wastewater the initial leakage of bio-solid from the reactor and reduction of permeate flux were main problems of the system. The initial flux of 0.4㎥/㎡/day reduced to 0.2㎥/㎡/day in 12 days operation at 133㎝ water head. During the stable operation period, average SS concentration of effluent was 1.8㎎/L showing 96.4% removal. Organic removal efficiency was 98.3% as COD_Cr and 91.6% as BOD with the effluent concentration, 14.4㎎/L and 1.5㎎/L, respectively. T-N removal efficiency was 60% at C/N ratio 4.5.

공복 시 Caffeine 투여 후 일회성 운동이 흰쥐의 인슐린 및 골격근의 GLUT-4 발현에 미치는 영향

정일규,오명진,김영표,김종오,윤재석,서태범,윤진환 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

This study was done to investigate the effects of caffeine ingestion on the expression of GLUT-4 in rats' skeletal muscle(soleus m) and blood insulin level after 12 hr fasting condition and one hour treadmill running. Total 19 rats(Sprague-Dawley) who were 7week Did were used for experimental subjects and raised for 1week in the room controled the air temperature and relative humudity(22℃ and 50%). They were divided three groups ; 12hr fasting group(F group, n=5), fasting+exercise group(FE, n= 7) and fasting+caffeine+exercise group(FCE group, n=7). FG and FCE group performed treadmill running for one hour and the treadmill speed was 18m/min that was supposed to be moderate exercise to rats. Each Dr rats in FCE group was forced to he given the caffeine solution(5mg/kg, Sigma Chemical co.) through stainless steel tube directly to their stomachs one hour before treadmill exercise. Immediately after treadmill running, we anesthetized them with the mixed solution(Ketamin 80g/kg and Rompun 5ml/kg) to draw 3ml blood from heart four insulin analysis and then obtained the rats' soleus muscle for GLUT-4 expression. We found that FCE group showed significantly higher GLUT - expression then the other groups and FE group showed the lowest GLUT-4 expression. This rusults suggest that the endurance type of exercise in fasting condition inhibit the GLUT-4 expression in working muscle and the caffeine helped to facilitate the GLUT-4 expression during endurance type of exercise. The future studies needed to confirm the action of caffeine to increase the GLUT- 4 and the mechanism.

림프종으로 오인된 위 매독 1 예

김병규;전태주;박지영;서희영;오태훈;김현정 인제대학교 2011 仁濟醫學 Vol.32 No.-

Syphilis is a chronic systemic infectious disease caused by Treponema pallidum. Syphilitic involvement of the stomach can occur via the blood flow in the primary or secondary period of syphilis, but its incidence is very rare. Gastric syphilis should be considered in patients at risk of sexually transmitted disease who complains of abdominal pain, nausea and vomiting and in whom unusual endoscopic or radiographic features are found. Because gastric syphilis has no pathognomic clinical findings and it can simulate gastric cancer or lymphoma, it’ s not so easy to diagnose. If diagnosed, however, gastric syphilis can be easily treated with proper antibiotics. We report on a case of gastric syphilis that manifested epigastric pain, anorexia and weight loss. It was initially thought to be lymphoma, but it was correctly diagnosed by serologic testing and progress.

O_3와 O_3/UV를 이용한 수용액중의 음이온계면활성제의 처리에 관한 연구

김태성,문병현,이택순,서규태 7개 국립대학교 환경연구 논문집 공동발행 위원회 2001 환경연구논문집 Vol.1 No.1

Water pollution by discharging surfactant into receiving water has become serious. One of pollutants widely contained in domestic wastewater is surfactants. To remove these surfactants, ozonation has been used but it doesn't perfectly remove relatively non-degradable organic matter. Recently, an advanced oxidation process using OH radical has been developed and applied for removing such non-degradable pollutants. In this study it was treated Sodium Dodecyl Benzene Sulfonate (DBS) using Ozone and Ozone/UV process. The results showed that removal efficiencies by Ozonation increased as the dissolved ozone concentration, initial temperature and pH increased. The combination process of Ozone/UV for DBS removal resulted in 4 times higher reaction rate than the Ozonation process. The combination process showed higher removal efficiencies for treating laundry wastewater and the removal efficiencies was increased by pretreating particle matters.

급수시스템에서 동관부식에 대한 음이온물질의 영향

윤혜정,서규태,이택순 7개 국립대학교 환경연구논문집 공동발행 위원회 2005 공업기술연구 Vol.5 No.-

The corrosion rate of copper pipe used in distribution system was studied in presence of chloride, sulfate and fluoride ions, respectively. It was compared with test results using mixtures of sulfate and chloride at concentrations similar to those of tap water in Gyeongnam area. The corrosion rate of copper pipe was higher in the presence of sulfate than chloride showing two fold higher rate. In contrast copper concentration in synthetic water containing chloride was rather higher than in the presence sulfate. Fluoride was generally considered less aggressive toward corrosion of pipes, but corrosion rate and the concentration of copper were relatively large values. During potentiostatic anodic polarisation a relatively large current was producted in the chloride containing solutions.

정수처리 공정에서 철과 망간 잔류 농도에 관한 연구

최미리,서규태,문병현,이택순 7개 국립대학교 환경연구 논문집 공동발행 위원회 2003 공업기술연구 Vol.3 No.-

This study was to investigate the cause of the color and turbidity in a small-scale water treatment plant using lakes water as water supply source. Water qualities in aqueducts, in depth of the lakes and in each process were measured. And effects of prechlorination on each unit operation in the water treatment, especially on iron and manganese removal, were studied. The concentration of iron and manganese was 0.13, 0.08 mg/L in the surface water and 1.93 and 0.433 mg/L in 15 m depth of the lake. Higher iron concentration of the inlet was measured to 5.35 mg/L which was caused by the steel aqueduct corrosion. The optimun coagulation dosages of Poly Aluminum Chloride(PAC) and Liquid Aluminum Sulfate (LAS) were 17.5 mg/L and 35 mg/L. Pretreatmnet of raw water with CaCOl improved the removal efficiencies of iron and manganes. However, more efficient method for removing iron and manganes was required.

용지 호수공원의 수질관리 방안에 관한 연구

이춘수,서규태,문병현,이택순 7개 국립대학교 환경연구 논문집 공동발행 위원회 2003 공업기술연구 Vol.3 No.-

This study was performed for water quality management of Yonggi Lake Park in Changwon City. The results are as follows; The water quality of the lake was deteriorated during summer season because of algal blooming. It was estimated that existing treatment capacity of the lake water was not sufficient to meet the target lake water quality. And so the lake water circulation period, 40 days should be shorten to below 30 days by increasing the treatment capacity. Fountain and air supply facilities for 02 supply and mixing caused rather resuspension of solid settled at the bottom of the lake. It was also evident that the extended detention of water in the lake resulted in water quality deterioration. Consequently it is important to supply high quality water from other sources. Especially lower temperature water had better effect on improvement of the water quality.

O_3/활성탄에 의한 고도정수처리에 미치는 기존처리공정의 영향에 관한 연구

김현정,서규태,문병현,이택순 7개 국립대학교 환경연구 논문집 공동발행 위원회 2001 환경연구논문집 Vol.1 No.1

The effect of conventional process, such as coagulation, sedimentation and rapid sand filtration, on O_3/GAC was evaluated for stable operation of the advanced treatment process. Five years long term water quality data was analyzed for a water treatment plant adopting O_3/GAC. Treatment efficiency of unit process in the plant was also monitored for 7 months(from 2000. 11 to 2001. 5) to investigate the pre-treatment effect on the operation of the process. Despite significant seasonal variation of raw water quality, treated water of the plant was good enough to meet drinking water quality standard. However effluent turbidity (1NTU) of sand filter was relatively high compared to the guideline that turbidity of filtered water should be lower than 0.3NTU for the effluent turbidity, 2NTU, of sedimentation tank. It was observed that effluent organic compound of sand filter gave an adverse effect on the running time of GAC filter. This phenomenon could be deduced from the correlation of the effluent water quality of sand filter and GAC in terms of TOC and UV-254. Therefore more sophisticated operation, such as adopting enhanced coagulation, should be given to the conventional process for stable and extended operation of GAC filter to produce safer drinking water even at deteriorated raw water quality.

출력귀환과 스카이 훅 제어 방식에 의한 차량 현가 장치의 성능에 관한 연구

김재열,이규태,송찬일,정동화,서윤종,유신 한국공작기계학회 1996 한국생산제조학회지 Vol.5 No.4

The dynamic model of the suspension system is developed by using both sky-hook control and output feedback control techniques, based on the performance sensitivity index. Many vehicles use sky-hook control theory operated with only one sensor, due to relatively low cost and easy implementation. On the other hand, output feedback control implemented with state variables has difficulties in measuring such as tire deflection, etc.