• KIEAE Journal
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• v.10 no.5
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• pp.181-186
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• 2010

Research on construction waste unit was in progress in the 1995 when 'Proper Disposal and Recycling Measures for Construction Waste' was made by the Seoul Development Institute. Such an effort has been made in order to cope with the lack of natural resources in Korea and to utilize the reusable resources. Furthermore, these efforts have also increased due to the improved standing of Korea in the international community. A large number of residential buildings were built in the response to the government's policy by increasing the supply of houses between the 1970's and 1980's. In 2000, more reconstruction and redevelopment was done because of the aged buildings and change of use for those buildings. And the project has been actively promoted until now, which caused a sharp increase in the generation volume of construction waste. In Korea, 8 kinds of construction waste unit, including the standard construction manpower and materials estimation, are introduced. Currently, they provide standards to different building categories and waste properties while for construction sites different standards are applied. This study aims to measure the actual amount of construction waste after sample buildings are dismantled and analyzes the estimation of the waste quantity by using various standard units. Through comparison, this study will figure out the differences among the standard units in order to find out how to apply the standard units properly. Moreover, this research will provide practical measures to apply such units to construction sites.

• Environmental and Resource Economics Review
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• v.26 no.3
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• pp.399-416
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• 2017

This study examines the problem of efficient scheduling of waste collection in isolated regions like islands when the waste accumulated amount surpasses the standard ceiling by effectively tracking the accumulating trends based on the optimum checking model of Keller (1974). To grasp whether the waste accumulated amount in isolated regions exceeds the standard ceiling, the relevant authorities can tightly check during a set period, but this entails higher monitoring costs. On the other hand, if the accumulated waste over the ceiling is not immediately checked and collected, and continues for a set period of time, innovative efforts for waste management may be highly demanded. As such, the tradeoffs are considered to draw the optimal checking schedule. This study shows that the authorities get to check less frequently the waste accumulation trends if the monitoring costs increase or when the failure rate of waste management systems drops. On the other hand, they get to check more frequently if the accumulated waste amount in isolated regions exceeds the standard ceiling and welfare loss grows as a result. It also shows that frequent checking is the optimal choice if the social marginal benefits enjoyed from innovative efforts made to keep accumulated waste below the standard ceiling, are not significant.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2010.09a
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• pp.291-291
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• 2010

Emerging global economic growth and increasing demand for energy supply and demand imbalance and the excessive use of fossil fuels existing the rapidly increasing greenhouse gas emissions and resource depletion of global energy crisis is deepening. Accordingly, improvement of living conditions around and through the natural ecological preservation and the need for a comfortable life for the meeting the importance of energy management and consumption are emerging. Many in the field of architecture for energy-saving measures and conducts research and analysis from the early stages to verify the energy performance of BIM (Building Information Model) technology development and commercialization through the building's energy performance to an objective technology forecasts Analysis of the existing building energy performance in waste management also possible that "BIM-based green building process, the possibility of" suggested. In this study, BIM through the analysis of information using the structures for the management of waste, energy and physical data collected by Mapping it can effectively plan resources for recycling were analyzed.

• Journal of Soil and Groundwater Environment
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• v.17 no.1
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• pp.1-7
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• 2012

Selection of appropriate liner type would be the most important factor to prevent groundwater contamination by leachate from waste management site. This report introduces the IWEM (Industrial Waste Management Evaluation Model) developed by US EPA to evaluate the potential pollution of groundwater under the waste management unit and to suggest an appropriate type of liner, and provides with the results of IWEM application to a coal-ash landfill site in Korea as a case study. IWEM uses a standard method using a database, a decision-making process based on site characteristics, and the user-friendly input-and-output system. Authors evaluate this model to be applicable in Korea provided that the database is replaced into local data.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2015.05a
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• pp.61-62
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• 2015

This study has analyzed the engineering characteristics of resource-cycling mortar according to the variation of fine aggregate type using illite with high development potentials by setting the goal as developing eco-friendly construction materials. As a result, while flow has increased if recycled fine aggregate and waste refractory are used separately or mixing them adequately in case of flow and compressive strength, the flow had somewhat declined followed by illite replacement. However, the possibility of such usage is determined to be adequate if used by mixing illite, recycled fine aggregate and waste refractory properly due to the dry shrinkage effect.

• Resources Recycling
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• v.13 no.4
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• pp.17-22
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• 2004

This study was focused on the treatment of thickened sewage sludge. General bacteria and E. coli were disinfected over 99％ and organic compounds were decomposed after irradiation. It was suggested that this process can be an alternative for digestion Process. The moisture content in sludge was decreased over 10％ (w/w) and the coagulation of sludge particles was enhanced by irradiation at the dose of 15 kGy and addition of sea waste resource (star-fish) as a dewatering aid.

• Journal of Fisheries and Marine Sciences Education
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• v.27 no.2
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• pp.516-525
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• 2015

In this study, Life Cycle Assessment(LCA) was applied to the production processes of waste cooking oil recycling products. Recycling products as defined in the Law of Saving of Resources and Recycling Promotion are biodiesel and soap. Weighting result of biodiesel production process showed that the most significant impact potential was abiotic resource depletion(84.17%) followed by global warming(13.93%). In the case of the soap, the most significant impact potential was also abiotic resource depletion(58.59%) followed by global warming(33.71%). In terms of the whole system of the biodiesel production process, methanol showed the largest environmental impact potential(87.35%). While in the case of the soap, sodium chloride showed the largest environmental impact potential(99.99%). This study suggests that there should be improvement of the methanol recovery system in the biodiesel production process and also appropriate use of the major environmental impact materials in both processes.

• Journal of the Korean Society for Marine Environment & Energy
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• v.5 no.2
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• pp.35-40
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• 2002

By the introduction of cleaning and drying processes, thermal extrusion system for the volume reduction of used polystyrene buoys was developed. It was tested in the costal area for the determination of operational reliability. By the removal of oyster shells and cleaning of salt, waste polystyrene buoys was changed to the raw material of plastics. The lower cost of one-tenth compared with that of the outer request treatment is promising the practical use of waste buoys' volume reduction system.

• Journal of the Mineralogical Society of Korea
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• v.23 no.3
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• pp.251-265
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• 2010

A column bioleaching experiment at room temperature with no addition of sulfuric acid was effectively carried out to leach the valuable elements from pyrite, which is common mine waste. The Fe concentration of pyrite leachate from bioleaching column was 14 times higher than that of the control leachate, and secondary minerals were not formed. The $SO_4^{2-}$ concentration of the pyrite leachate was 2.99 times higher. The XRD intensity of the (111), (200), (220), (311), (222), (230) and (321) planes of pyrite decreased, whereas the intensity of (210) and (211) increased after column bioleaching.

• Journal of the Korea Organic Resources Recycling Association
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• v.11 no.1
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• pp.77-83
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• 2003

본 연구는 폐플라스틱 재활용의 합리적인 방안을 제시하기 위한 기초자료로서 재활용방법(물질재활용, 에너지 회수, 화학적재활용)에 대한 주요 환경인자를 규명하며, 이를 토대로 전과정평가 도구(tool)인 시마프로 5.0을 이용하여 폐플라스틱의 재활용 방법별 환경성을 비교하였다. 폐플라스틱의 재생원료화 전 공정에 투입되는 투입산출물로 인한 환경부하(Original Impact)와 재생원료의 신재 대체를 고려한 환경부하 삭감효과(Avoided Impact)를 합한 최종 영향 평가를 토대로 재활용방법별 환경성을 비교하여 환경영향범주에 대하여 비교 평가하였다. 그 결과 폐플라스틱 재활용방법에 대한 각 영향범주별 주요 영향 요인은 지구온난화로 나타났다. 또한, 지구온난화에 대한 영향은 물질재활용, RDF공정 및 용기형 폐플라스틱 고로원료화공정이 음(-)의 값으로 환경삭감효과가 크게 나타났으며, 오존층 파괴에 대한 영향은 유화 공정이 환경부하가 가장 크게 나타났다. 산성화, 부영양화 및 광화학산화물 생성에 대한 영향은 용기형 고로원료화와 RDF공정이 환경부하삭감효과가 큰 것으로 나타났다.