제주 벤쳐기업의 경영특성 분석

서현진,현명택 제주대학교 경상대학 경영경제연구소 2000 경영경제연구 Vol.2 No.-

效率的인 環境敎育을 위한 敎授·學習方法의 改善에 關限 硏究 : 中學校를 中心으로 in Middle School

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

This paper focuses on the development of desirable curriculum for environmental education in middel school. From the questionnaire investigation for teachers and students of 10 middle schools in Gyeongnam-do, it is desirable that the eduaction program should be practical and experiential rather than the current cramming lecture. In addition, environmental education program should be introduced as a compulsory subject through continuous and systematic curriculum. A training program is necessary for specialist group teaching environmental issues too. Institution of regional environmental education center is an appropriate meausre to develop such program. It will be helpful for open communication between school and social community. National support is necessarily required to promote research activity and to develop innovative teaching materials in such center. Consequently the national environmental network will be constructed and effective environmental education will be implemented.

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.

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.

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_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.

생물학적 폐수처리시 휴지기간이 처리특성에 미치는 영향에 관한 연구

김상수,문병현,서규태,이택수 7개 국립대학교 환경연구 논문집 공동발행 위원회 2004 공업기술연구 Vol.4 No.-

Under recent situation of more stringent effluent regulations, small scale biological process for industrial wastewater treatment has on operational problems, such as highly variable loadings into the system. Especially, the seafood processing industry has difficulties to treat is because of its highly variable organic loading and high saline concentration (>30g/d㎥). High salt concentrations disrupt metabolic functions and cause plasmolysis and/or loss of activity of microbial flora, hence the biological treatment of the saline wastewaters could produce low COD removal efficiency. On the basis of background mentioned above, an appropriate operation of the existing treatment plant is required for stable effluent discharge at even highly influent loading. In this study, effects of long term ( days) idle periods on floc characteristics were investigated in treatment of saline wastewater by SBR. Temporal stop of feeding affects biological activity in the reactors and then floc structures such as size and fractal dimension. After a certain period of reoperation for orgnic activity, the size and fractal dimension of floc start to increase.

포기/비포기 시간비가 활성슬러지 floc의 특성에 미치는 영향

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

Many researches on SBR(Sequencing batch Biological Reactor) for the removal efficiency of contaminants and effects of operation mode in effluent have been conducted. However, little studies for the characteristic of biological floc affected by operation mode have been made. The purpose of this study is to compare the effect factors on the removal efficiency of nitrogen and phosphorus in SBR system. And also it is to look for new information on the size and characteristics of biological floc by changed aerobic/anaerobic time ratio. Results shown that the removal efficiency of organic matter, nitrogen and phosphorus was higher in the operation mode of higher aerobic/anaerobic time ratio. The floc size and fractal dimension produced in higher aerobic/anaerobic time ratio were larger. These result implied that the settling characteristics of floc could be produces in the operation mode of higher aerobic/anaerobic time ratio.

염분이 함유된 폐수의 생물학적 처리시 염분농도가 오염물질의 제거에 미치는 영향

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

Effects of salt concentration and C/N ratio on pollutants removal efficiencies were investigated in treatment of seafood wastewater by sequence batch reactor(SBR). The synthetic seafood wastewater containing salinity from 3,000 to 10,000 mg/L NaCI and C/N ratio of 2 and 4 was treated by SBR. Removal efficiencies of COD_(Mn), T-N, and T-P decreased with increasing salt concentration, but eventually reached a pollutants removal a platrau. As systems adapted in salts until salts concentration of 8,000mg/L, the time required to reach the pollutants removal efficiencies at steady state was reduced. However, the removal efficiencies of pollutants sharply decreased and the time require to reach steady state was increased as salt concentration rose to 10,000mg/L, Removal efficiencies of COD_(Mn) were higher for C/N ratio of 4 than for 2. Effects of salt on the nitrogen removal were not faster than the organic removal but the time required to the nitrogen removal at steady state was ncreased. The removal efficiencies of phosphorus also were redueed as salt concentration increased, which inhibited the release of phosphorus than the uptake.