• Resources Recycling
• /
• v.13 no.4
• /
• pp.46-52
• /
• 2004

The present main research direction of waste treatment is the development of incineration system for low pollution. Also, heat value of waste is increased because of the rising of living standard, environmental consideration and collection of sorted waste for recycling. Therefore, many researches have been continued for solving ash problem including heavy metals, dioxin problem and high energy efficiency by use of high heat value. This study is described for the facilities of pyrolysis system, pyrolysis-melting system, pyrolysis-gasification melting system.

• Journal of the Korea Organic Resources Recycling Association
• /
• v.10 no.1
• /
• pp.128-138
• /
• 2002

Waste recyling is a very important concept with waste minimization in the waste managment. Especially, recycling waste from the point of environmental and economical view is useful. The recycling part of package waste needs to continuously grow. But, cosmetic container, which is continuosly increased as waste. The difficulty of waste treatment in cosmetic industy produces complicated environment problem. Cosmetic container is difficult to recycle because it mostly made of complex material. Also, cosmetic container is difficult to separate I source and thus usually are generated mixed waste. In this study we performed an analysis on the Recycling Improvement method of a Cosmetic Container The result of this study could be summarized as follows 1) As a part of law and a system improvement, must be achieved Improvement Cosmetic law, Deposit refund system. and charge system, Technology development for recycling of a cosmetic container, Extension of refill productions, Recovery system establishment of a cosmetic container and inducement of a maker's recycling paticipation. 2) As a part of a cosmetic container design improvement, must be achieved simplification and standardize of container's cuality, Cosmetic life cycle extension, Selection of recycling materials and Cosr reduction of a cosmetic container. In conclusion, To the recycling improvement of a cosmetic container, must be achived collective development of system improvement, participation of the government and company and a consumer's recycling consciousness. Most of all, A company need to try to recycling container development of a cosmetic container.

• Resources Recycling
• /
• v.16 no.3 s.77
• /
• pp.3-11
• /
• 2007

Presently, most of gold is smelted from gold concentrates and anode slimes. Anode slimes are by-products of nonferrous smelters such as lead and copper. In addition, gold is recovered from waste dental and medical materials, waste gold coating solution, and waste printed circuit boards (waste PCBs). The smelting method of gold from gold concentrates and various wastes containing high concentration of gold is largely divided into chlorination, cyanidation, and amalgamation methods. For the anode slimes, electrolysis method is usually used, which largely consists of roasting, high temperature melting and electrolysis processes. Also, various wastes containing low concentration of gold are mainly treated by pyrometallursical processes. In the paper, current status on gold smelting technology is reviewed, and a novel process for gold smelting which is researched in the recent is briefly introduced.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 2004.05a
• /
• pp.652-655
• /
• 2004

환경에 대한 관심이 증가하면서 소비자에게 판매한 제품이 사용 후 생산자에게 되돌아오는 과정에서 발생하는 waste를 줄이기 위한 역공급사슬(Reverse Supply Chain)의 개념이 발생하게 되었다. 특히 폐자동차의 경우는 다른 제품에 비하여 중량이 상대적으로 커서 폐기되는 양이 많고 환경에 유해한 재질이 많이 포함된 대형 내구성 폐기물이다. 그런데 이러한 폐자동차는 폐차장이라는 한정된 곳에서 발생하는 것이 특징이므로, 수거 및 회수 체계가 잘 관리된다면 보다 큰 재활용 효과를 얻을 수 있다. 이 논문에서는 현재의 수거 시스템 상에서 폐자동차 부품의 재활용이 가지는 경제성을 살펴보고, 자동차 부품의 재활용 또는 재 이용률을 높이기 위한 폐자동차의 역공급사슬을 새로이 제안하였다. 개선된 역 공급사슬에서는, 자동차 판매업체(제조업체)가 주도적으로 부품 재활용에 참여하게 된다.

• Proceedings of KOSOMES biannual meeting
• /
• 2008.05a
• /
• pp.117-120
• /
• 2008

As we can see at the oil spill occident on the coast of Taean, the viscosity of the spilled oil becomes thicker as time goes by. It becomes waste oil with the form of tar. It moves to other areas following a tide. When the temperature of the water goes up, the viscosity becomes lighter and forms oil film. It repeats the process spreading to and polluting extensive areas where the tide reaches. People have used hand nets to collect waste oil of tar at the sea. But it is very difficult for them to collect the tar type waste oil spread on large areas before it reaches to the beach. This paper tried to find a way to collect the tar type waste oil efficiently. It used absorption mat of boom type that uses the attachment characteristics of the tar type waste oil and floating waste recovery device of net type. It tested the possibility of using the devices at the oil spill accident on the beach of Taean. The result showed that net type recovery device was much more efficient in collecting the waste oil in short time than the hand net system of people. It confirmed that the net type recovery device could be used to collect tar type waste oil.

• Journal of Korean Society of Environmental Engineers
• /
• v.38 no.7
• /
• pp.353-363
• /
• 2016

In this study, traditional treatment scenario of food wastes that collected and transported food waste is recycled in large treatment facilities and suggested treatment scenario of onsite zero discharge system that food waste is treated in housing complex were supposed. The scenarios were compared and analyzed by capital expenditure, oil consumption, $CO_2$ emission quantity, operating expenditure and management expenses. The capital expenditure, oil consumption and $CO_2$ emission quantity of small scale dispersion dealing method is the lowest compared to traditional treatment method. As a results, it is possible to obtain the effect that operating expenditure was reduced by 91% and management expenses was reduced by 40% with suggested treatment method. The treatment method that have low capital expenditure is tend to lower oil consumption and $CO_2$ emission quantity. The small scale dispersion dealing method have the lowest capital expenditure, oil consumption and $CO_2$ emission quantity and the linked method with sewage treatment have the highest expenditure and $CO_2$ emission quantity. Eventually, the optimal model of onsite zero discharge system in housing complex is small scale dispersion dealing method.

• Journal of the Korea Organic Resources Recycling Association
• /
• v.13 no.3
• /
• pp.63-70
• /
• 2005

As the landfill ban of food waste has enforced since 2005, the composition of municipal solid waste(MSW) has changed dramatically. In this 2 year study, MSW in a small city has collected 3 times at 10 different generating points, and physico-chemical analysis has done. From the result, the effect of landfill ban of food waste on the physico-chemical properties of MSW was described. Landfill ban of food waste has reduced by 12 weight % in the composition of food waste in MSW, and has reduced by 25 % of bulk density. After landfill ban of food waste, water content of MSW has reduced to 32.3%, which is reduced by 14.1 % of water content of year 2004 data. Low heating value of MSW after landfill ban was 2991.4kcal/kg, which has increased 32% than that of year 2004 data. From landfill gas generation modeling, it is estimated that the yearly generation rate of landfill gas will be reduced by 5% than in case of accepting food waste into the landfill.

• Journal of the Korea Organic Resources Recycling Association
• /
• v.20 no.1
• /
• pp.31-40
• /
• 2012

In order to making resources for the organic wastes, it is very important to understand for the life cycle of wastes before the physicochemical analysis and engineering technology. Therefore we try to fine the solution through the interdisciplinary consilience between natural science and social science for the management of refuge in summer resort. Summer visitors of beach answered that fly tipping of refuse was 65.56% and insufficient separation was 17.78% about the survey. But insufficient separation was 42.5% and fly tipping was 37.5% in valley. The survey for the effective methods at reducing refuse was represented that campaign and teaching was 47.78%, fine was 23.33% and using the standard bags was 18.89% in beach. Campaign and teaching was 37.5%, using the standard bags was 37.5% and fine was 15% in valley. Bulk density of refuse in gyeongpo beach was measured in $74kg/m^{3}$. This value was three times as much low than municipal solid wastes. Moreover, the composition of refuses in beach showed that combustible materials was 81.1% and incombustible materials was 18.9%. Moisture, ash and combustibles were analyzed 19.0%, 9.2% and 91.8% respectively.

• Journal of the Korea Organic Resources Recycling Association
• /
• v.30 no.4
• /
• pp.85-99
• /
• 2022

Recently, environmental issues have become serious, and Jeju Island is promoting a pilot project of a smart collection system(waste weight-based collection system) at clean houses in Yongdam 1-dong. However, the new system faced an opposition from elderly residents who were not accustomed to using machines or smart devices. In order to solve this problem, it was intended to suggest policies related to this by conducting environmental education and identifying problems with the effect of environmental education awareness through data analysis method. The results showed positive answers in most of the satisfaction and achievement evaluations, but it is also true that most of the residents need to be educated and more information should be given. In order to vitalize education, it is important to increase the number of instructors and support them to increase their expertise. It is also important to take a practical process that strengthens public relations, shares information, and links with the local community to increase the actual participation of local residents. In addition, it is critical to secure a budget from local governments to maintain education and public awareness, and it will be helpful to link with talent donation projects in the region.

• Journal of the Korean Society for Marine Environment & Energy
• /
• v.4 no.3
• /
• pp.74-80
• /
• 2001

Due to floating marine debris, seabed litters, dead shellfishes and polluted sediments, etc. , which are mainly caused by fishery activities in a large scale around the coastline, expansion of industrialized areas from economic development and drastic increase of free time by the improved standard of living, Korean coast is believed to be cast beyond the self purification of marine ecosystem. Seabed litters, if not remedied in a timely manner, will eventually lead to the overall disorder of benthic ecosystem. Thus, in order to prevent marine ecosystem from being thrown into confusion by seabed litters and to restore ocean environments, it is reasonable to investigate the current status of the seabed litters by carrying out an extensive examination on them and to equip ourselves for marine debris with an systemized tool that provides supports to the building process of an efficient methodology of litters disposal through managing related data appropriately. As an primary step to this goal, a systematic method of investigation is presented in this paper. With this methodology, the present state of the seabed titters is properly understood for the specified list of ports.