• 한국대기환경학회지
• /
• 제29권5호
• /
• pp.574-580
• /
• 2013

Green technology encompasses a growing group of methods and materials, from techniques for generating energy and alternative resources to non-toxic cleaning products. Green technology is expected to solve current problems in atmospheric environment such as climate changes due to green house gases and hazardous air pollutants. This paper provides a review on the status of green technology and policy guidelines in Korea as well as the green technology for air pollutants. It presents the R&D projects and future direction in atmospheric environment, and the green technology in mobile source air pollution. Emerging green technology contributes to sustainable growth and development of atmospheric environmental industry for better air quality.

• 한국토양비료학회지
• /
• 제26권1호
• /
• pp.49-56
• /
• 1993

답전윤환지(畓田輪換地) 토양(土壤)에서 작부체계(作付體系)를 달리했을때 작물(作物)의 생육시기별(生育時期別) 토양(土壤)에서 방출(放出)되는 지구온난화원인(地球溫暖化原因)가스 -이산화탄소(二酸化炭素)($CO_2$), 메탄($CH_4$) 및 아산화질소(亞酸化窒素)($N_2O$) -양(量)을 조사(調査)한 결과(結果)를 보면 다음과 같다. 1. 작물재배기간중(作物栽培期間中) 이산화탄소(二酸化炭素)의 방출량(放出量)은 벼 연작재배시(連作栽培時) 가장많고 벼와 콩의 윤작재배시(輪作栽培時) 가장 적은 양(量)을 방출(放出)했으며, 답전윤환(畓田輪換) 방법별(方法別)로는 벼 연작토양(連作土壤)이 가장 많았고 매년윤환(每年輪換) 및 이년윤환(二年輪換)은 비슷했으며, 전전환시(田轉換時) 가장 적은 방출량(放出量)을 보였다. 2. 메탄의 방출량(放出量)은 벼 연작재배토양(連作栽培土壤)에서 가장많은 방출량(放出量)을 보였으며 답전윤환(畓田輪換) 및 벼와 콩 혹은 감자와 배추 등(等)을 윤작재배(輪作栽培)하므로써 방출량(放出量)의 뚜렸한 감소를 보였다. 3. 아산화질소(亞酸化窒素) 방출량(放出量)은 감자와 배추를 이년(二年)마다 윤환재배(輪煥栽培)하므로써 가장많은 방출량(放出量)을 보였으며 다음은 벼 윤작재배구(輪作栽培區)에서 많았다. 그러나 답전윤환구(沓田輪換區)의 벼와 콩 및 감자와 배추를 윤작재배(輪作栽培)하므로써 뚜렷한 감소(減少)를 보였다. 4. 토양(土壤) 공기중(空氣中) 산소(酸素) 및 이산화탄소(二酸化炭素) 구성비율(構成比率)은 작물(作物)의 생육시기(生育時期)에 따라 대단히 상이(相異)했으며 작물재배기간중(作物栽培期間中) 산소(酸素)는 4~10%로 대기(大氣)보다 낮고 이산화탄소(二酸化炭素)는 1~22%로 대기(大氣)보다 수십 내지 수백배로 높았으며 변이(變異) 폭(幅)이 대단히 컸다. 5. 작물재배기간중(作物栽培期間中) 이산화탄소(二酸化炭素)($CO_2$), 메탄($CH_4$) 및 아산화질소(亞酸化窒素)($N_2O$) 등(等) "지구(地球) 온난화(溫暖化) 원인(原因)가스"의 방출(放出)은 작물재배지(作物栽培地) 토양(土壤)의 수분(水分), 온도(溫度), 산소농도(酸素濃度) 및 양분(養分) 등(等)의 변화(變化)와 작물생육시기(作物生育時期)에 따라 크게 영향(影響)되었다.

• Ecology and Resilient Infrastructure
• /
• 제7권4호
• /
• pp.248-255
• /
• 2020

본 연구에서는 국내 음식물쓰레기 (food waste, FW) 분야에 대한 재활용 현황을 분석하고 green house gases (GHG) 배출 관리방안에 대해 고찰하였다. 연구 결과, FW의 자원 활용성을 향상시키고 GHG 배출을 부가적으로 저감시키기 위해서는 적절한 선순환체계가 필요하다는 결론을 얻었다. 효과적인 퇴비화를 위해서 우선 GW의 활용이 고려되었다. 특히 3세대 바이오매스로써의 GW (phytoplankton, periphyton, macrophyte etc.)는 퇴비화 공정에서 FW의 단점을 보완하고 질적 능력을 향상시킬 수 있는 좋은 기능성 첨가제로 판단된다. 또 하나의 접근법은 최종산물 (예: 토양개량제)을 오염물질 완충이 가능한 bio-filter로 가공하여 그린인프라에 적용하는 방안이다. 이러한 생태공학적 접근과 시도는 안정화된 재활용 산물의 기존 활용 이외에도 FW 자원화에 대한 새로운 적용처를 제시할 수 있으므로 향후 효과적인 탄소 넷제로 (Net-Zero) 시스템 구축에 기여할 수 있을 것으로 판단된다.

• 한국대기환경학회지
• /
• 제30권4호
• /
• pp.387-397
• /
• 2014

This work aims at estimating global warming potentials (GWP) of $CF_3Br$ and HFC-134a among green house gases. It has been reported that they have much higher GWP than $CO_2$ in the atmosphere. $CF_3Br$, halon 1301 which is well known to be a fire extinguisher, as one of the bromine-containing halons has been banned since 2003 due to destruction of ozone. HFCs, a kind of chiller which replaced chlorofluorocarbons (CFCs) are one of greenhouse gases regulated by the Kyoto Protocol. In this study, we produced GWPs of $CF_3Br$ and HFC-134a by calculating a life time and measuring an absorption cross section to obtain a radiative forcing (RF). Their absorption cross sections were measured by using Fourier-transformed infrared spectroscopy (FTS) with a gas cell filled with their certified reference materials at room temperature. As a result, the RFs of $CF_3Br$ and HFC-134a were 0.32 and $0.168Wm^{-2}ppb^{-1}$, respectively and the GWPs were calculated as 7989, 6076, 3903 for $CF_3Br$ and 3855, 1300, 656 for HFC-134a for the time horizon of 20, 100, 500 years, respectively. Overall, uncertainty of the estimated GWPs can be estimated to be about 2.6%. Our results were compared with those proposed by the previous studies (IPCC, 2007; WMO, 1999).

• 융복합기술연구소 논문집
• /
• 제5권1호
• /
• pp.23-26
• /
• 2015

The purpose of present study is to analysis the Characteristics of fuel economy and Green house gases due to the driving mode conditions of The hybrid electric vehicle(HEV). HEVs are divided into mild and power types according to the their functions. mild type HEVs are inexpensive because they do not need to implement a pure electric mode. Power type HEVs are more expensive but has also better fuel efficiency. In the present paper, the test results for the gasoline vehicle using FTP-75 mode and HWFET are present.

• 대한안전경영과학회:학술대회논문집
• /
• 대한안전경영과학회 2006년도 춘계공동학술대회
• /
• pp.385-390
• /
• 2006

Air pollution problem has been one of the most urgent global environmental problems since UN Framework Convention on Climate Change accepted in Rio Conference, 1992. International environmental regulations of global community to reduce the green house gases have influenced the domestic environmental policies. International trends of environmental regulation are introduced in this paper.

• 멤브레인
• /
• 제23권3호
• /
• pp.189-203
• /
• 2013

과불화질소, 육불화황, 삼불화질소와 같은 불소를 포함한 불화가스는 이산화탄소 온실가스에 비교해 배출량은 적지만 지구온난화지수가 매우 높아 지구온난화에 미치는 영향이 크다. 이러한 불화가스의 주요배출원이 국가 중추산업인 반도체/LCD 산업이나 중전기 산업 등에 집중되어 있어 더욱 심각하다. 따라서 본 논문에서는 불화가스 저감 기술 중 분리막 기반 불화가스 회수 분리 공정을 중심으로 불화가스 저감 기술 개발 현황을 살펴보고자 하였다.

• 교육시설 논문지
• /
• 제20권3호
• /
• pp.41-52
• /
• 2013

In the current condition of seeking eco-friendly development, Green Building Certification Criteria can reduce environment burden that is able to be arose in life cycles of buildings. Moreover, it is a great help to induce to constructing pleasant environment. The ripple effect that also improves saving of energy and resources of the whole country, and green-house gases reduction effect and environment friendliness of other buildings can be expected by promoting eco-friendly education facilities which accounts for a great part of public buildings in comparison with other buildings. In this study, analysis of old and new indicators' contrast and contents in Green Building Certification, and post evaluation of education facilities and interviews on authorities were proceeded for improving evaluation indicator of each item in Green Building Certification Criteria. As a result, it analyzed problems in terms of institution and operations management, and drew implications accordingly. In addition, it has a significance in that it proposes improvements of substantively applicable indicators with high applicability.

• 한국물환경학회지
• /
• 제32권5호
• /
• pp.433-441
• /
• 2016

Many large dams have been constructed for water supply, irrigation, flood control and hydropower in Korea for the last century. Meanwhile, recent studies indicated that the artificial reservoirs impounded by these dams are major sources of carbon dioxide (CO₂) to the atmosphere and relevant to global budget of green house gases. However, limited information is available on the seasonal variations of CO₂ evasion from the reservoirs located in the temperate monsoon regions including Korea. The objectives of this study were to estimate daily Net Atmospheric Flux (NAF) of CO₂ in Daecheong Reservoir located in Geum River basin of Korea, and analyze the influencing parameters that characterize the variation of NAF. Daily pH and alkalinity (Alk) data collected in wet year (2012) and dry year (2013) were used for estimating the NAFs in the reservoir. The dissolved inorganic carbon (DIC) was computed using the pH and Alk measurements supposing an equilibrium state among the carbonate species. The results showed seasonal variations of NAF; negative NAFs from May to October when the primary production of the reservoir increased with water temperature increase, while positive NAF for the rest of the period. Overall the reservoir acted as sources of CO₂ to the atmosphere. The estimated NAFs were 2,590 and 771 mg CO₂ m^-2d^-1 in 2012 and 2013, respectively, indicating that the NAFs vary a large extent for different hydrological years. Statistical analysis indicated that the NAFs are negatively correlated to pH, water temperature, and Chl-a concentration of the reservoir.

• 한국농공학회논문집
• /
• 제64권6호
• /
• pp.55-63
• /
• 2022

Odors emitted from pig houses have been a constant root of legal issues in pig farming. These gases are among the main causes of health and mental stresses to nearby communities, so policymakers and researchers continuously study to reduce the concentration of odorous gases from pig facilities. A continuous field experiment proved that the concentration of odor emissions inside the pig houses is highly dependent on ventilation rate, breeding details, and animal activities. However, the standard odor emission rate worldwide widely varies due to differences in pig house designs and ventilation requirements. Thus, this study aimed to measure the odor emission rates, considering the actual condition of selected Korean pig houses, through field measurement. The odor measurements were performed at three different pig production facilities without odor abatement technologies. The target experimental pig houses were buildings for weaning, growing, and fattening pigs. Results showed that the actual ventilation rate in target pig houses falls below the standard ventilation requirement of pigs, resulting in high odor concentrations inside the pig houses.