환경기초시설 중 하·폐수처리과정으로부터의 GHG 배출량 예측 : 광주·전남지역을 중심으로 Kwang ju·Chollanado

전의찬,김전희,송민종 동신대학교 환경연구소 2000 환경연구 Vol.5 No.1

본 연구는 환경기초시설 중에서 생활하수와 산업폐수 처리장에서 발생하는 특히 광주·전남 지역을 중심으로 온실가스의 배출량과 장래 저감 잠재성을 평가하고, 기후변화협약을 대비한 국가 Inventory의 기초자료로 이용될 수 있도록 하였으며, 결론적으로 하ㆍ폐수부문에서 온실가스 배출 잠재성을 감소시키기 위한 방안으로 먼저 하수 및 폐수의 체계적인 수집이 이루어져야 하며, 수집된 하ㆍ폐수는 반드시 적절한 처리과정을 통하여 수계에 배출되어져야 한다. 또한 적절한 처리과정 중에 배출되는 온실기체의 대기 중으로의 누설을 억제하고 회수율을 높이는 관리대책이 수립되어야 하며, 회수율을 높이는 대책은 하ㆍ폐수부문에서 온실가스 배출 잠재력에 대한 저감율에 대하여 좀더 효율적임을 알 수 있다. 또한 상기와 같은 저감방법 외에도 하ㆍ폐수부문에서의 온실가스 저감잠재력을 위하여 정부는 온실가스 배출량을 계산하는데 필요한 여러 가지 자료를 확보하고, 좀더 신뢰할 수 있는 온실가스 배출량을 산출하며, 이들 자료를 토대로 정부는 하ㆍ폐수부문에서의 온실가스 저감잠재력을 위하여 연차적으로 관리대책을 설정해야 한다. 그리고 이에 대한 검중체계를 마련하여 전ㆍ후 효과분석을 해야 할 것이다. This study evaluated greenhouse gas(GHG) emissions and future reduction potential emitted from domestic and industrial wastewater treatment system in Kwangju city and Chollanamdo. For decreasing of GHG emissions potential, systematic collection method of domestic and industrial wastewate is established and collected domestic and industrial wastewater is treated reasonal wastewater treatment process. GHG which is leak from wastewater treatment process to air was controled, Control policy which are increasing recovery ratio was established. In addition to decreasing method, Government make sure of variable data fro estimating GHG emissions quality and evaluated GHG emissions quality reliable method.

2000년대 광주광역시의 이동오염원 배출량 예측 연구

전의찬,송민종 東新大學校 工業技術硏究所 1997 工業技術硏究 Vol.3 No.-

For estimation of air pollutants emmision from mobile sources in Kwangju, we classified type of mobile sources as vehicles, railway trains, aircrafts and estimated quantity of air pollutants emmision in mobile sources in 1995 and 2002. Using NO₂ as a base, it is estimated that mobile sources emitted 17,309 ton/yr of air pollutants in 1995, as compared to 22,107 ton/yr estimate for 2002. It is also revealed that private cars were the source of 99% of air pollutants.

생물학적 흡수법을 이용한 악취물질의 처리

전의찬,송민종 동신대학교 환경연구소 1997 환경연구 Vol.2 No.1

그 동안 악취를 유발하는 대표적인 물질의 하나인 황화수소의 처리에 대한 많은 연구가 수행되었다. 그러나 이들 연구의 대부분은 물리ㆍ화학적인 방법에 의존하고 있어 설치 및 운영에 경제적인 문제가 수반되었으며, 이에 따라 최근에는 활성슬러지법과 토양흡착 등 미생물을 이용한 생물학적 처리방법들이 연구되어지고 있다. 본 연구에서는 미생물의 부착이 용이한 섬모상충진층을 설치한 바이오스크러버를 이용하여 황화수소를 제거하고자 하였다. 실험결과 바이오스크러버에 의한 황화수소의 제거효율은 일반적인 스크러버을 이용한 제거효율보다 약 40% 높게 나타났으며, 황화수소의 유입농도 및 유입유량이 낮을수록 높게 나타났다. An odor that causes people displeasure and disgust and sometimes that has lead people to start demonstration. Among these odors, H2S is the worst smelling, therefore many people have started dup studies a researches to find a way to remove this odor. To remove this odor, researchers have began to develop a process which is called a bio-scrubber. These bio-scrubbers have been built and are in the process of being tested and compared with a general scrubber, to see if it is as economical and effective as the general scrubber. The test results shows that the bio-scrubber has a fixed flow of 5milliliter per min. The bio-scrubber was compared with the general scrubber in all three stage. The results show that the bio-scrubber removes more H2S in stage one, two and three than the general scrubber removal in the same three stages. Thus proving to be far more effective than its predecessor.

쓰레기매립장에서의 황화수소 배출특성

전의찬,김조천,사재환 동신대학교 환경연구소 1999 환경연구 Vol.4 No.1

본 연구는 쓰레기 매립장에서 발생되는 악취물질인 황화수소를 대상으로 하였다. 매립장에서 발생되는 악취는 심각한 사회문제가 되고 있으며, 우리나라의 경우 발생되는 쓰레기의 대부분을 매립에 의존하고 있으므로, 악취물질 배출량에 대한 정확한 측정이 필요하다. 쓰레기매립장에서 발생되는 악취유발물질은 넓은 공간에서 다양한 종류로 발생되며, 매립경과시간에 따라 그 발생량과 종류가 달라지기 때문에 정확한 발생량을 산정하기가 어려울 뿐만 아니라 악취유발물질 종류를 파악하기가 어렵다. 따라서 본 연구에서는 flux chamber, floating chamber를 이용하여, 쓰레기 매립장에서 발생되는 악취물질을 채취하였으며, 악취유발물질중 가장 대표적인 물질인 황화수소를 대상으로 발생량을 산정하였다. Flux chamber를 이용하여 산정한 발생량은 매립장 표면, 침출수처리장, 가스배제공에서 황화수소는 각각 9.6ton/yr, 0.01ton/yr, 2.gton/yr로 산정 되었다. 쓰레기매립장에서 발산되는 황화수소의 배출량을 보다 더 정확히 산정하기 위해 매립 완료 경과 시간, 매립 공법, 다짐 정도, 온도, 토양의 습도 등과 배출량특성을 파악하고, 상관관계를 찾는 연구의 진행이 필요하리라 판단된다. Odorous gases emitted from landfill sites create serious social problems. In Korea, most wastes have been dumped in landfill sites. It is challenging to correctly identify and measure the amount of all odorous gases from landfill sites, not only because many different kinds of gases emit from typically vast area but also because chemical composition varies with the age of any landfill site. In this study, I focused on typically problematic hydrogen sulfide, gas samples were captured at Unjung-dong landfill site in Metropolitan Kwangju with flux chamber and floating chamber, and analyzed for the amount of hydrogen sulfide(H₂S). From the gas emission pipe, landfill site surface and waste leachate treatment plant, estimated total amount of H2S emission are 2.9ton/yr, 9.6ton/yr and 0.01ton/yr respectively. Further in-depth study on co-relation between age, packing characteristics, temperature and humidity of a landfill site and gas emission characteristics is needed.

이산화티타늄계 광촉매를 이용한 톨루엔의 처리 특성

전의찬,송민종,김전희 동신대학교 환경연구소 2000 환경연구 Vol.5 No.1

각종 급ㆍ만성의 건강장해를 일으킬 뿐만 아니라, 광화학 반응에 의해 오존을 형성하는 것으로 알려진 휘발성유기화합물 중 대표적인 물질인 톨루엔을 광촉매산화법으로 처리할 경우 최적 처리조건을 분석하고자 광촉매의 결정구조, 광원의 세기, 전자수용체로서 산소의 유무 등에 따른 톨루엔의 처리효율을 분석하였다. 실험결과 루틸령 결정구조에 비해 아나타제형 결정구조를 갖는 이산화티타늄의 톨루엔 처리효율이 높게 나타났으며, 광원의 세기가 높을수록 전자수용체로서 산소가 존재할 경우 높은 처리효율을 나타내었다. 시간과 공간적인 제약으로 물, 오존 그리고 증기와 같은 다양한 전자수용체가 존재할 경우의 톨루엔의 처리효율을 파악하지 못하였으며, 온도, 습도 및 촉매활성에 영향을 주는 여러 가지 인자들을 대상으로 그것들의 변화에 따른 처리효율의 고찰을 못하였다. 앞으로 보다 효율적인 이산화티타늄계 광촉매의 제조방법 개발과 이산화티타늄계 광촉매를 이용한 다양한 VOC 처리방법의 개발이 요구된다. An available methods for abating VOC(including Toluene) are thermal or catalytic incineration, liquid absorption, solid adsorption, condensing, membranes, biodegradation and plasma discharge, but a number of defects are these VOC abating methods, including ; requires a auxiliary fuel, generate secondary pollutants(waste catalysts, waste absorbents, waste adsorbents, ozone, etc.), a large scale, etc.. But photoactive catalysts, when illuminated with UV-light, generate highly reactive radicals that can oxidize the organic contaminants in gas. One methods to increase the efficiency of the process, and thereby reduce the light energy requirement, is by developing more active catalysts. Because of, ball type TiO2 catalyst were obtained commercially and/or prepared in laboratory were examined for their photoacivity, and they are TiO2 added some annex(Al203, SiO2, KsO, P205, etc.). The organic compounds used to identify the best photocatalysis condition were toluene. This study also examined the impact of catalyst structure, light intensity, existence of oxygen as an electron acceptor and Toluene initial concentration on the reaction kinetics. Labratory experiments were performed to investigate TiO2 photocataysis for treating test gas contaminated with Toluene. and TiO2 photocatalysis efficiency for mineralization of Toluene is also evaluated. The photooxidation of Toluene was carried out in a photocatalytic reactor at room temperature. I performed Toluene photocatalytic oxidation experiments using a single-pass annular reactor. The organic-contaminated gas was prepared in teflon sampling bag(25L) and passing through photocatalytic reactor by vacuum pump which is located reactor outlet. The Toluene diluted with mixture air or nitrogen gas. Flow rates for test gas stream were controlled by micro flow meter going out the reactor. The reactor illuminated with 15W near-UV lamp, BLB lamp or Fluorescent lamp. The light intensity at the catalyst surface were estimated to be 0.8 to 6㎽ ㎝-2s-1. The inner cell of the reactor was packed with ball type titanium dioxide(φ 6㎜). Toluene was determined by GC-FID of gas samples taken from the a glass sampling bulb which was located at reactor outlet by gas-tight syringe. TiO2 photocataysis for treating test gas contaminated with Toluene. and TiO2 photocatalysis efficiency for mineralization of Toluene is also evaluated. Using the anatase type photocatalyst, Touene conversion rate is greater than that of rutile(86.1% conversion of 100ppmv Toluene using anatase type photocatalyst, 78% conversion of 100ppmv Touene using rutile type photocatalyst at 0.5L/min) Effect of light intensity on the rate of Toluene photocatalytic decomposition was investigated by three type lamps within the reactor. When light intensity to increase, the Toluene conversion rate to increase. Using the BLB lamp showed higher activity than the Fluorescent lamp, but UV lamp showed the hight photocatalytic activity(19.1% conversion of 100ppmv Toluene with Fluorescent lamp, 60.4% conversion of 100ppmv Toluene with BLB lamp, 86.1% conversion of 100ppmv Toluene with UV lamp at 0.5L/min). Experiments with added oxygen as an electron acceptor improved the reaction rate considerably(86.1% conversion of 100ppmv Toluene without oxygen, 62.5% conversion of same Toluene concentration with mixture air at 0.5L/min).

'지방의제 21 실천계획' 수립을 위한 시민 환경의식 조사 연구

전의찬,사재환,조순철 동신대학교 환경연구소 2000 환경연구 Vol.5 No.1

원자력 지역난방의 대기질 개선 효과에 관한 연구

전의찬 東新大學 1990 論文集 Vol.3 No.-

The purpose of this Study is to show the effect of the district heating by a small nuclear plant on SO_2 concentration reduction. The district heating by the small nuclear plant reduces annual average SO_2 concentration by 13.5%, and winter season average SO_2 concentration by 14.4% at the highest point. The maximum reduction of SO_2 concentration can be found in Gaepo area, where the reduction is estimated 23.8% in annual average, and 19,6% in winter season average concentrations. The average reduction of SO_2 concentration in the district treating area is found to be 11.3%, in annual average concentration, and 10.5% in winter season average concentration.

비구개관낭종에 관한 X선학적 연구

전찬덕,이상래,황의환 大韓口腔顎顔面 放射線學會 1993 Imaging Science in Dentistry Vol.23 No.1

The purpose of this study was to evaluate the clinical and radiographic features of 35 cases of nasopalatine duct cyst by means of the analysis of periapical and/or occlusal radiograms in 35 persons visited the Department of Oral and Maxillofacial Radiology, School of Dentistry, Kyung Hee University and Chonbuk National University. The obtained results were as follows: 1. The incidence of nasopalatine duct cysts was higher in males(74.3%) than in females(25.7%). 2. The nasopalatine duct cysts were the most frequently occurred in the 4th decades(34.3%). The 6th and 7th decades(17.1%, 17.1%) were next in order to frequency followed by the 5th decades(14.3%), the 3rd decades(8.6%), the 2nd decades(5.7%), and 8th decades(2.9%). 3. In the signs and symptoms of nasoplatine duct cysts, 25.7% were swelling, 17.1% were swelling and tenderness, 20.0% were swelling and pain, and 37.2% were a symptom. 4. In the shape of nasopalatine duct cysts, 40.0% were round type, 48.6% were oval type, and 11.8% were heart type, In symmetry of the nasopalatine duct cysts to the median palatine surture, 85.7% were symmetry, 14.3% were asymmetry. 5. In the width of nasopalatine duct cysts, 11.4% were 6-10mm, 48.6% were 11-20mm, 25.7% were 21-30mm, and 14.3% were 31-40mm. 6. In the periphery of nasopalatine duct cysts., 82.9% were distinct, 17.1% were relatively distinct. 7. In the change of root, 51.5% were intact, 17.1% were root divergence, 20.0% were root resorption, and 11.4% were root divergence and resorption.

울산지역 초, 중, 고등학생들의 자기 체형에 대한 인식 및 불만족도에 대한 조사

홍찬의,홍성완,정철주,이동진,최광해 영남대학교 의과대학 2008 Yeungnam University Journal of Medicine Vol.25 No.2

Background : In this study, we examined body image perception and dissatisfaction with weight and height in children and adolescents, according to age and body mass index. Additionally, we compared our findings with those of previous studies concerning eating disorders. Materials and Methods : In July and August 2008, 1,501 students were sampled from elementary, middle, and high schools in Ulsan and assessed using self-completion questionnaires. We used the Korean version of the Eating Attitude Test-26 (EAT-26) to screen for eating risk groups Participants were stratified by grade, gender, and body mass index. Results : 1) Dissatisfaction with height, weight, and body image was greater in the older group. 2) Dissatisfaction with weight and body image was greater in the heavier group. 3) EAT-26 scores and the number of individuals at high risk for eating disorders were higher in the female group than in the male group. Conclusion : The EAT-26 score in this study was similar to those found in Previous Westem studies. 2) There were a number of high-risk individuals in the female group, with a tendency toward earlier Presentation. Continuous health management and prevention programs are required.

TiO₂광촉매 운전조건에 따른 MEK의 처리특성

전의찬,사재환 동신대학교 환경연구소 2001 환경연구 Vol.6 No.1

최근에는 TiO₂광촉매를 이용하여 휘발성유기화합물(VOCs)을 처리하는 광분해 연구가 활발히 개발 되어지고 있다. TTiO₂ 광촉매반응은 TiO₂입자의 에너지 밴드보다 더 높은 에너지가 흡수하면 전자와 홀이 생성되며, 이때 발생된 전자는 분자상태의 산소와 결합하여 환원반응이 일어나며, 홀은 공기중의 물분자나 OH기를 흡수하는 산화반응이 일어난다. 본 연구에서는 휘발성유기화합물 중 MEK를 대상으로, 회분식 반응기와 연속식 반응기를 사용하였으며, 여러 가지 운전조건에 따른 제거효율을 살펴보았다. 코팅방법은 pyrex 판과 유리관에 TiO₂ 용액을 채우고, 일정한 속도로 TiO₂용액을 제거하는 Dip-coating방법을 이용하였다. 실험 결과, 코팅횟수를 3회 실시 했을 때 제거효율이 향상되었으며, 자외선8W에 비해 65W를 사용했을 때 약 40%이상 제거효율 향상을 보였다. 또한, 반응기의 지름이 작을수록 높은 제거효율을 보였다. Recent photo catalytic degradation method using TiO₂ photo catalytic is developed for volatile organic compounds(VOCs) treatment. TiO₂ photo catalytic process is initiated from the generation of hole-electron pairs on the semiconductor upon absorbing the ultra-violet light with energy being equal or higher than the band gap energy. Electrons can reduce an electron acceptor such as molecular oxygen and holes can oxidize electron donors including adsorbed hydroxide(OH) or water(H₂O) anion. In the suduy, the target gas compound was methyl ethly ketone(MEK), and examined in a batch scale reactor and a continuous scale reactor at various experimental conditions. A TiO₂ thin film photo catalyst was formed by the dip-coating method after filling a pyrex plate and pyrex tube with the TiO₂solution, it was removed from the reactor at a constant rate. Then it was dried at 120°C for one hour. Result of study, photo catalytic degradation of MEK was improved removal efficiency when TiO₂ photo catalytic coated 3nd times. When increase of UV light intensity(65W), photo catalytic degradation of MEK was improved higher than lower UV light intensity(8W) and it was improved at a small diameter reactor.