• Proceedings of the KAIS Fall Conference
• /
• 2009.12a
• /
• pp.1046-1049
• /
• 2009

최근 화석에너지 고갈 문제와 폐기물의 지속적인 발생량 증가로 인해 폐기물을 이용한 열에너지 회수가 이슈화 되고 있다. 폐기물처리를 통한 에너지 회수 공정 가운데 소각이 가장 많이 이용되고 있으나 소각시 발생하는 대기오염 물질을 처리하기 위한 설계 및 설치비용에 많이 소요 된다. 본 연구에서는 화학공정 모사기인 Aspen plus를 이용해 소각공정 및 배가스 처리 공정모사를 실시하였다. 폐기물 소각 공정으로는 1 2차 연소실과 NO2를 환원하는 SNCR공정, 산성가스(HCl, SO2)를 제거하는 SDA공정, 입자상 물질을 처리 하는 bag filter공정을 모사하였다. 공정모사 결과 실제 산업폐기물 소각로의 처리효율과 일치 하였고 이를 바탕으로 동일한 공정 및 조건하에 소각로에 투입되는 폐기물의 조성비를 달리하여 공정 모사한 결과 오염물질의 배출량을 예측할 수 있었다. 이러한 오염물질 발생량 예측은 소각장의 폐기물 투입이 일정하지 않을 경우 조업 조건의 변경에 도움 뿐만아니라 공정개선의 효과적일 것으로 판단된다.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.15 no.5
• /
• pp.3270-3278
• /
• 2014

Many researches has been conducted as extreme rainfall in hydrology and extreme rainfall analysis is not proper for determination of CSOs treatment capacity. In this study, runoff is calculated by tranformation from rainfall to runoff according to Interevent Time Definition. The capacity of sewage treatment plant is designed by 3 times of DWF(Dry Weather Flow) and the efficiency of present sewage treatment plant is very low becauseat at present. Also, The sewage treatment plant can not control CSOs. In this research, the pollution load is calculated by EMC(Event Mean Concentration) and pollution concetration of total runoff is a standard deciding suitablility of present sewage treatment plant. Finally, CSOs treatment capacity is determinated considering pollution load.

• Korean Chemical Engineering Research
• /
• v.45 no.4
• /
• pp.311-318
• /
• 2007

Soil contamination in Korea has been accelerated every year. Because of their persistence and cumulative tendency in the environment, soil contaminants have potential long-term environmental and health concerns and it is estimated to cost enormous expense for clean-up. Korea government has legislated the law on conservation of soil environment in mid 1990s, and managed and treated hazardous wastes in contaminated sites as a remediation policy since then. Soil remediation technologies are classified into in-situ/ex-situ or biological/physico-chemical/thermal processes according to applied places or treatment methods, respectively. In Korea, clean-up of polluted sites has been mostly carried out at military areas, railroad-related sites and small-scale oil spilt sites. For these cases, in-situ remediation technologies such as soil vapor extraction (SVE) and bioventing were mainly used. In recent days, an environmental-friendly soil remediation emerged as a new concept - for example, a new soil remediation process using nanotechnology or molecular biological study and an integrated process which can overcome the limitation of individual process. To have better applicability of remediation technologies, comprehensive understandings about the pollutants and soil characteristics and the suitable techniques are required to be investigated. Above all, development of environmental technologies based on the sustainability accompanied by public attention can improve soil environment in Korea.

• 핵융합뉴스레터
• /
• s.42
• /
• pp.10-11
• /
• 2009

지구온난화와 환경오염을 줄일 수 있는 하나의 방안으로 고연비의 경유를 사용하는 운송수단이 각광을 받아왔으나, 입자상 오염물질 및 질소산화물 배출량의 증가 등 경유 차량의 이용에도 문제점이 드러나고 있다. 주요 선진국들이 이와 관련한 규제를 강화함에따라 이에 대응할 수 있는 기술 개발이 요구되는 가운데 녹색 기술 개발을 이끄는 국가핵융합연구소는 플라즈마를 활용한 경유 차량의 후처리장치 개발을 추진하고 있다.

• Journal of the Korean Society for Railway
• /
• v.18 no.6
• /
• pp.552-557
• /
• 2015

Ballast gravel in a railroad field is often polluted by grease and heavy metals. In this paper, the performances of a dry cleaning method for polluted ballast gravel in which pollutants on the gravel surface can be physically removed was extensively studied. A polluted ballast cleaning device able to shoot emery blasting media onto the surface using compressed air was prepared. Polluted ballast gravel was put into this device for cleaning, with the treatment time varied from 1 to 10 min. The cleaning efficiency of the total petroleum hydrocarbons and heavy metals were studied. The total petroleum hydrocarbon removal efficiency was 70-80% for gravels sampled from a locomotive waiting line, while it was 40-60% for gravels sampled from a turnout area. The heavy metal removal efficiency exceeded 90% for copper and lead, while it was 65-80% for nickel and zinc. This system was found to be effective for the remediation of polluted ballast gravels.

• Proceedings of the Korean Society of Fisheries Technology Conference
• /
• 2000.10a
• /
• pp.133-134
• /
• 2000

최근 한국의 연안해역은 육상으로부터 오염물질의 다량유입과 자가오염으로 인하여 빈산소 수괴가 형성되고 있을 뿐만 아니라, 영양염류의 용출량 증가에 따라 부영양화가 가속화되고 있는 실정이다. 특히, 양식어장으로 장기간 사용되고 있는 내만 해역의 해저 퇴적물 오염은 적조발생과 같은 2차적인 문제를 야기 시키고 있어 해양환경 보존 및 수산생물 생산에 커다란 장해가 되고 있다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
• /
• 2000.05a
• /
• pp.206-207
• /
• 2000

해저퇴적물은 수생생물들의 주거공간을 제공하여 수생생태계에서 중요한 역할을 담당한다. 그러나 오염된 해저퇴적물은 수계에서 축적되는 양보다 퇴적물에서 수계로 용출되는 양이 많아 수계의 오염을 가중시키는 가장 끈 원인이 된다. 오염도가 높은 퇴적물에서는 특정종의 서식을 불가능하게 하거나 서식이 가능하다 할지라도 서식생물의 체내에 오염물이 농축되어 이는 먹이사슬을 통하여 수중서식생물들에게 축적되게 되어 궁극적으로 인간들에게도 나쁜 영향을 미치게 된다. (중략)

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
• /
• 2004.04a
• /
• pp.235-238
• /
• 2004

유류 오염토양에 대한 과산화수소의 화학적 고도산화에 대한 실험실 및 현장 적용 가능성을 타진하였다. 현장 오염토양 10g에 각각 과산화수소(34.5%) 원액을 중량비로 0.3%, 0.6%, 1.0%, 2.0%를 처리하여 혼합 후 실험실에서 1일 반응 후 TPH 농도를 분석하였다. 분석결과 토양 대비 2.0%의 과산화수소를 투입한 처리구에서 가장 높은 복원 효율을 측정할 수 있었고 2.0%까지의 투입농도에서 미생물의 농도 변화는 측정되지 않았다. 오염된 토양에 과산화수소를 오염 토양 중량 대비 2%를 분무기로 살포 후 로타리가 설치된 경작 장비로 뒤집기 수행하여 1일 후 오염토양의 오염농도를 분석한 결과 초기 TPH 5,365ppm의 농도가 2,317ppm으로 56.8% 복원된 것을 확인할 수 있었다.

• Clean Technology
• /
• v.13 no.1 s.36
• /
• pp.1-15
• /
• 2007

Biological treatment is a relatively recent air pollution control technology in which off-gases containing biodegradable odors and volatile organic compounds(VOCs) are vented through microbes. It is a promising alternative to conventional air pollution control methods. Bioreactors for air pollution control have found most of their success in the treatment of dilute and high flow waste air streams containing VOCs and odor compounds. They offer several advantages over traditional technologies such as incineration or adsorption. These include lower treatment costs, absence of formation of secondary pollutants, no spent chemicals, low energy demand and low temperature treatment. The three most widely used technologies are described, namely biofiltration, biotrickling filtration, bioscrubbing. The most widely used bioreactor for air pollution control is biofilter, but it has several limitations. In the past years major progress has been accomplished in the development of vapor phase bioreaction systems, for solving problems of biofilter. Biotrickling filters are more complex than biofilters, but are usually more effective, especially for the treatment of compounds which are difficult to degrade or compounds that generate acidic by-products. This, paper reviews fundamental and theoretical/practical aspect of air pollution control in biofilter, biotrickling filter and bioscrubber, focusing more extensively on biotrickling filtration. Special emphasis is given to the operating parameters and the factors influencing performance for air pollution control, and cost estimation in biotreatment technologies.

• Environmental engineer
• /
• s.166
• /
• pp.8-11
• /
• 2000