• Journal of the Korean Recycled Construction Resources Institute
• /
• v.10 no.1
• /
• pp.9-14
• /
• 2022

Most of the existing research on ferronickel slag has focused on its potential as aggregate and fine aggregate, this study was conducted focusing on the potential of ferronickel slag powder as a concrete admixture. For concrete, which fly ash, blast furnace slag, and FSP were mixed with each 10 % type the reactivity was evaluated by applying ASTM C 1260 of the United States. As a result, compared with the control group, the expansion rate of fly ash decreased by 8.43 % and that of fine blast furnace slag powder decreased by 14.46 %, while the expansion rate of ferronickel slag decreased by 49.40 %. it was confirmed that ferronickel slag can sufficiently be replaced existing supplementary cementitious admixtures such as fly ash and blast furnace slag in terms of suppressing the reactivity of aggregates. However as a result of SEM analysis, ettringites were generated, and additional research about how it affects concrete is needed.

• Journal of Animal Environmental Science
• /
• v.15 no.1
• /
• pp.59-68
• /
• 2009

This study investigated the evaluation of maturity, stability, nutrient and heavy metal from rotating drum composter of food waste amended with poultry manure composting inoculated with effective microorganisms(EM). Composting were performed for the first, drying reactor($15m^3$) 3 hours and the second, composting reactor($30m^3$) 24 hours, and parameters monitored this period included moisture content, NaCl, pH, electrical conductivity(EC), C/N ratio, organic matter(OM), nutrient content and heavy metal. Changes in compost temperature during composting were maintained constantly in the range of $60{\sim}80^{\circ}C$ using firewood boiler(450 MJ/h). We examined physicochemical parameters and heavy metals in order to assess their effectiveness as stability and maturity, nutrient and harmful indicators such as seed germination rate<60%, potassium 1>%, dm and NaCl>1%, dm at the end of the final compost. The finished compost obtained after decomposition phase at the end of the 2nd composter could not be utilized for land improvement or reclamation.

• Proceedings of the Korea Society for Industrial Systems Conference
• /
• 2003.11a
• /
• pp.517-524
• /
• 2003

현재 전 세계 각국은 지식 경쟁력 확보에 혈안이 되어 있으며, 우리나라는 풍부한 인터넷 인프라를 구비하여 지식 강국으로 발돋움하기 위한 충분한 토대를 마련하고 있다. 특히, 인력은 인터넷 시대의 핵심적 지식 자원으로서, 전문가 두뇌 연계 망(네트워크)의 구축과 운영을 통해 해당 분야 전문가간 협력 및 교류가 진행되면, 지식 정보의 동시 생성, 공유, 활용 체제의 확립이 가능하다 전문가 커뮤니티의 구성원은 정보의 공유와 확산에 자발적으로 기여하는 지식의 선 순환 구조를 이루게 될 것이다. 본 논문에서는 국내외 과학기술 전문가로 구성된 한민족과학기술자 네트워크(KOSEN, www.kosen21.org)를 사례로 전문가 네트워크의 역할과 특징을 살펴보고, 지식 기반 사회에서 전문가 네트워크의 발전 방향을 제안하고자 한다. KOSEN은 지식의 생성, 공유, 활용 등의 지식관리 프로세스를 지원하는 과학기술 전문가 커뮤니티이다. 향후 인적 자원 및 정보 자원의 적절한 연계를 통해 지식의 활용 측면을 더욱 확대하여 본격적인 지식 정보 활용의 장으로 거듭나야 한다. 컨텐트 가치증대를 통한 전문가 참여 확대, 전문가들간 상호 연계의 확대를 통한 소 공동체 형성, 전문가들간 상호 학습, 정보 거래 메커니즘 구축 등의 다양한 방안을 통해 보완될 것으로 기대한다.

• 환경사랑
• /
• s.57
• /
• pp.6-9
• /
• 2010

협회 최주섭 부회장은 5월 26일부터 3박4일간 일본 츠키지 농수산물도매시장, 환경박람회 등을 한국해양수산개발원, 수산신문, 자원순환사회연대, 구리농수산물도매시장관리공사, 스티로폴 재활용사업자 등과 함께 민산관 합동으로 수산물상자 사용 및 재활용기술에 대한 현지견학을 다녀왔다. 이번 행사는 선진국의 수산물상자 사용 및 재활용실태를 기초로 하여 귀국 후 관련 전문가 간담회를 개최하여 최근 시설 현대화계획 중인 가락동, 노량진, 구리 농수산물도매시장 등 수도권 농수산물도매시장의 수산물 포장상자의 사용 및 재활용방법에 개선방안을 제시함으로서, 수산물의 유통의 청결 유지, 시장 환경 개선 및 포장상자의 자원화에 기여하고자 하였다.

• 환경사랑
• /
• s.50
• /
• pp.8-9
• /
• 2007

협회는 2003년부터 환경부로부터 인가 받은 발포합성수지 포장재의 생산자책임재활용의무 이행 업무 수행과 관련하여 현장에서의 문제점을 파악하고 그 개선방안을 모색하기 위한 연구사업을 진행하였다. 지난 4월부터 11월까지 7개월 간 (사)자원순환사회연대에 의뢰하여 서울 등 6대 광역시, 강원, 호남, 충청권 농촌 지역 등의 발포합성수지 생산자, 사용자, 배출 및 수거자, 재활용사업자 등을 대상으로 제도분석, 설문조사, 현장조사 등으로 행해진 "발포합성수지 포장재 사용 및 처리실태 조사"연구사업의 결과를 요약 소개한다.

• Korean Journal of Construction Engineering and Management
• /
• v.8 no.1 s.35
• /
• pp.107-115
• /
• 2007

Today's human life is more conveniently advantaged and abundant as industrial society advanced. However, the development has been creating a serious environmental crisis. Environmental pollution and exhaustion of natural resources recently became an important issue in construction industry as well as the concern about construction waste management and recycling the resources has arisen. Because the industrial wastes are not only increased quantitatively but also qualitatively intricate and various, groping for ways of reducing the use of resources primarily and recycling is urged on promotion. Currently, only about 33% of the wood wastes produced in construction site are recycled and the others are incinerated or disposed through irregular circulation process. In this study, I will investigate the present status of generating, processing, and recycling construction wood wastes and compare domestic disposal trend to other countries. In addition, I will analyze the actual condition of processing wood wastes in the construction site, verify the irrational causes, and simplify anomalous factors for the purpose of more efficient and correct activation of wood waste treatment and recycling on construction field and protection of environment in the long run.

• Environmental and Resource Economics Review
• /
• v.19 no.3
• /
• pp.597-632
• /
• 2010

There is general agreement that global warming is occurring and that the main contributor to this probably is the buildup of green house gasses, GHG, in the atmosphere. Two main contributors are the utilization of fossil fuels and the deforestation of many regions of the world. The burning of fossil fuels increases atmospheric carbon while the burning of fuel-wood reducing fossil fuel consumption along with its forest source maintain an atmospheric carbon level. The standing timber in the forests is a carbon sink, as are wood buildings and structures, and fossil fuel in the ground. This paper is designed to examine a number of current issues related to mitigating the global warming problem through forestry. For this purpose, we develop a modeling approach by integrating timber market, fossil fuel market and carbon cycling model. We use discrete time optimal control theory to identify optimal time paths, the laws of motion, and stationary stats solutions of endogenous variables in the model. On the basis of these results, we identify the optimal amounts of subsidies to be provided or taxes to be imposed by the regulatory agency to mitigate atmospheric carbon accumulation. We also present a numerical example to help illustrate the characteristics of variables in the model when the social cost for atmospheric carbon incrementally shifts upward. A surprising result is that the social cost function for atmospheric carbon has a very smaller impact on the optimal rotation period than previous literature suggested.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2021.06a
• /
• pp.190-190
• /
• 2021

우리나라는 전체 면적의 63.0%가 산림으로 구성되어 있고, 일정면적 내 나무들의 총 부피를 의미하는 입목축적의 경우 1973년에 11.3 m³/ha에서 2015년에 146.0 m³/ha로 43년 동안 1292.0% 증가하였다. 이에 본 연구에서는 유역 면적의 70.2%가 산림에 해당하는 용담댐 상류 유역(930.2 km²)을 대상으로 SWAT(Soil and Water Assessment Tool)을 이용하여 장기간 산림 성장에 따른 수문 변화를 평가하였다. 산림 성장 변화 분석을 위해 산림청의 전국산림자원조사에서 제공하는 침엽수, 활엽수, 혼효림 식생 자료를 1980년부터 2019년까지 40년의 산림 성장 자료를 10년 단위(1980s; 1980~1989, 1990s; 1990~1999, 2000s; 2000~2009, 2010s; 2010~2019)로 구축하였으며, Terra MODIS MOD15A2 엽면적지수(LAI) 자료를 2010년부터 2019년까지 구축하였다. LAI는 연대별 식생 높이의 상관성을 고려하여 1980년부터 2019년까지 회귀하여 총 40년 자료를 구축하고 10년 단위로 활용하였다. SWAT의 검보정은 2010년부터 2019년까지 실측된 유량, 증발산량 및 토양수분을 이용하였으며 검보정 결과 유량의 평균 NSE는 0.57, R²는 0.69, RMSE는 1.66 mm/day, PBIAS는 4.95%이며, 증발산량 및 토양수분의 R²는 0.60, 0.52로 나타났다. 산림 성장에 따른 수문 변화를 관찰하기 위해 기상자료를 2010s로 고정하고 연대별 산림 정보를 입력하여 산림 성장이 물순환에 미치는 영향을 시공간적으로 평가할 예정이며, 침엽수, 활엽수, 혼효림 생장을 개별적으로 분석하여 식생별 영향을 비교 및 평가할 예정이다.

• Korean Journal of Plant Resources
• /
• v.35 no.4
• /
• pp.471-501
• /
• 2022

This study was carried out on 455 forest wetlands of south Korea for which an inventory was established through value evaluation and grade. Correlation analysis was conducted to find out the correlation between the types and grades of forest wetlands and 23 evaluation factors in four categories: vegetation and landscape, material circulation and hydraulics·hydrology, humanities and social landscape, and disturbance level. Through the improvement of types and grades of forest wetlands, it is possible to secure basic data that can be used in setting up conservation measures by preparing standards necessary for future forest wetland conservation and restoration, and to found a systematic monitoring system. First, between the type of forest wetland and size and accessibility showed a positive correlation, but the remaining items were analyzed to have negative or no correlation. In particular, it was found that there was no negative correlation or no correlation with the grades of forest wetland. Moreover, it was found that there was a very strong negative correlation with the weighted four category items. Thus, it is judged that improvement is necessary because there is an error in the weight or adjust the evaluation criteria of the value evaluation item, add an item that can increase objectivity. Especially, in the case of forest wetlands, the ecosystem service function due to biodiversity is the largest, so evaluation items should be improved in consideration of this. Therefore, it can be divided into five categories: uniqueness and rarity (15%), wildlife habitat (15%), vegetation and landscape (35%), material cycle·hydraulic hydrology (30%), and humanities and social landscape (5%). It will be possible to propose weights that can increase effectiveness.

• Journal of the Korea Organic Resources Recycling Association
• /
• v.13 no.2
• /
• pp.65-73
• /
• 2005

After the introduction of Volume-based Waste Fee System for municipal wastes, the disposal of food wastes became an issue an issue in society. Concerted efforts among government agencies have been made to manage food wastes separately from municipal wastes. For example, the Ministry of Environment, the Ministry of Agriculture and Forestry, and the Ministry of Health and Welfare established the '5-year('98-'02) Basic Plan for Recycling Food Wastes' in September 1998. Also changes in the waste disposal system has been sought, aiming at the Resource-circulating Society.