• 청정기술
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• 제29권4호
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• pp.262-271
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• 2023

전 세계적으로 폐플라스틱 발생에 따른 환경적 문제로 인해 이를 처리하기 위한 다양한 연구가 진행되고 있다. 이 중 폐플라스틱을 열분해하여 연료 및 원료 등으로 재활용하는 방법이 보편적이다. 본 연구에서는 '폐플라스틱 열분해유(WPPO)의 나프타 원료로 활용'을 목적으로 총 5종의 폐플라스틱 열분해유(WPPO)의 물성분석을 통해 나프타 원료로 사용이 가능한지 살펴봄과 동시에 넓은 비점범위로 인해 분리정제 기술 중 하나인 감압증류를 통해 light fraction과 heavy fraction으로 분획 및 GC-VUV로 paraffin, 올레핀 함량 및 기타 화합물 등의 구성성분을 나타내었다. 그 결과, WPPO의 원료, 분획에 상관없이 높은 올레핀 함량이 나타났고 방향족 및 paraffin 함량 등은 원료에 따라 차이가 발생하였고 산소 및 기타 화합물도 원료 및 분획별 차이가 큰 것으로 나타났다. 또한, light fraction은 나프타와 유사한 탄소분포를 나타내지만, heavy fraction은 탄소분포가 C₁₁ ~ C₁₄로 나타났다. 결론적으로, 폐플라스틱 열분해유의 나프타원료 활용을 위해서 추가 공정이나 원료 선별 등이 필요할 것으로 판단된다.

• 자원리싸이클링
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• 제28권6호
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• pp.3-8
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• 2019

최근 국내의 폐플라스틱 발생량 증가와 폐플라스틱 처분의 어려움 그리고 미세플라스틱 유해성 등으로 플라스틱 폐기물 문제가 심각하게 인식되고 있다. 이러한 문제를 해결하기 위해 일차적으로 플라스틱 사용량을 규제하는 방안이 있는데 이 경우 해당 품목별 규제근거를 명확히 하는 것이 중요하다. 또 다른 문제로 국내 재활용업체 규모의 영세성을 들 수 있는데 영세업체의 부진한 기술개발역량으로 재활용의 수율과 관련 품목의 가치가 하락하여 소비자들의 인식에 악영향을 끼치게 된다. 이러한 점은 재활용에 대한 기술적 진보와 함께 이를 지원하는 정부의 노력과 제도적 개선이 뒷받침되어야 할 것이다. 재활용 기술개발은 제품이나 포장재의 설계 단계에서부터 환경친화성과 재활용성을 고려해야 하는데 이는 국가적 지원과 지원과 관련 제도의 개선이 요구된다. 또한 선진정책 예를 들면 유럽연합의 정책을 참조하여 재활용 산업을 새로운 투자/고용기회 창출기회로 인식하고 필요하다면 규제에 대한 설득과 근거를 LC A 같은 평가과정을 통해 명확히 객관화해야 한다. 더불어 재활용품내 함유되어 있을지도 모를 유해화학물질의 규명 및 제거를 통해 재활용의 가치를 향상시켜 나가야 할 것이다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2002년도 학술.기술논문발표회
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• pp.17-22
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• 2002

This Waterproofing Material which mainly consisted of 2 components of waste tire chip powder and waste glass powder. This Study is abut development of waterproofing Material, There is not tried in domestic. The most Motive of this Study wishes to recycle resources and get the economic performance for waterproofing Material The result of this Study is as followings. (1) Dense waterproofing floor is formed between waste tire chip by Coupling Agent(the most effective method to encourage adhesive strength and raise cohesion of material by combination.) (2) Expected to bring effect to shorten construction period at spot application potentially space-time in moisture aspect. Also, shortening effect of construction period and spot work are considered to be gone efficiently selecting pre-mix construction method. (3) This development Waterproofing material has elasticity that nature side compatibility of cement ingredient and plastic Emulsion have when utilize and constructs waite resources (being waste tire chip and waste glass powdered).

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2009년도 하계학술발표대회 논문집
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• pp.427-432
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• 2009

This article deal with an overview of food waste treatment methods in Korea. Garbage trucks are operated manually by garbage workers who pick up the food wastes after food waste is placed in plastic bags by the road sides. However, there are a lot of problems such as, the smell from the split bags and the leachate, the loss of much energy and the complaints regarding the establishment new rubbish tips from the residents in the surrounding area. It also highlights our society's waste of resources. Although the new pneumatic waste transfer system or the dry method seem to have improved some of the environmental conditions, it still bears some problems, for example, the lack of reuse and recycling of resources and the economic problems. We have been analysed the advantages and disadvantages between the existing food waste system and the pneumatic waste transfer system. And the dry method and disposer were discussed. The results will indicate how the disposer can improve more than the existing systems and will provide the evidence to support.

• 한국지하수토양환경학회지:지하수토양환경
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• 제21권2호
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• pp.22-28
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• 2016

In order to evaluate landfill stabilization based on organic carbon, stoichiometric analysis and a biological methane potential (BMP) test based on modeling were performed at the 2^nd Sudokwon Landfill Site. Mass balance analysis through a BMP test proved to be more adaptable for evaluation, and it showed that 28.9% of landfill organic carbon was expected to remain by 2046, 30 years after landfill closure. The organic carbon ratio of total landfill waste for 2046 is forecasted as 2.9% in demolition waste and 5.1% in household waste, and, if one were to consider plastic as an organic waste, the ratios would increase to 15.9% and 28.3%, respectively. Therefore, it seems that organic matter biodegradation facilitating measures such as bioreactor landfill technology and preemptive recovery of combustible waste are necessary to shorten post closure management periods and to meet the landfill stabilization guidelines more safely.

• Applied Biological Chemistry
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• 제13권2호
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• pp.131-151
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• 1970

A new method of plastic film coating has been investigated to extend storage life of apples. The film coating was effected by dipping fresh apples in a plastic emulsion. The effect of plastic film coating on the preservation of freshness, respiratory activities and chemical components during storage, has been investigated on four leading varieties of apples. The results are summarized as follows: 1. The effect of film coating on storage life of apples was apparent, resulting in delay of after-ripening, shriveling, softening or physiological impediment as well as reducing consumption of reserve materials and waste fruits. 2. Change in the partial pressure of gas, i.e., increase in carbon dioxide and decrease in oxygen in apple tissue was resulted by the plastic film coating, suggesting that the film deposited on the fruit interfered with the diffusion of gases formed therein. 3. The effects of plastic film coating on the fruit storage varied with the type of plastic emulsions, coating temperature, varieties of apples and degree of fruit ripening. As regard to apple varieties, good results were obtained with PVA 217 for both American Summer Pearmain and Jonathan, and PVC 443 for McIntosh. 4. Reduction in the diminution rates of L-malic acid, ascorbic acid and soluble pectin etc. during storage of apples may account for the improved storage life of the fruits treated with plastic films.

• 한국포장학회지
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• 제8권2호
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• pp.44-48
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• 2002

플라스틱 포장재는 소비자들이 생각하는 것보다 환경에 미치는 영향이 적으나 플라스틱 제조업체들에게는 플라스틱 폐기물을 위한 재활용시장을 어떻게 활용화하는가는 매우 중요하다. 이것을 위하여 정부는 충분한 규모의 재활용시장을 키워나갈 수 있도록 MRF 등 각종 설비를 지원해야 하며 성공적인 재활용정책을 개발해야 한다. 경제적이고 다양한 재활용기술이 소개되고 있지만 이것은 반드시 잘 정비된 재활용정책이 우선되어야 성공할 수 있다.

• Journal of Mechanical Science and Technology
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• 제17권10호
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• pp.1485-1495
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• 2003

We investigate the triboelectrostatic separation of polyvinylchloride (PVC) from mixed plastics in the laboratory scale triboelectrostatic separation system. The flow and electric fields in the precipitator are obtained from the numerical solution of finite volume method. Using these flow and electric fields, we solved the particle motion equation considering the inertia, drag, gravity and electrostatic forces acted on the particles. The particle trajectories are obtained using a Lagrangian method as a function of different important variables such as Reynolds number, Stokes number, electrostatic force, electric charge and electric field distribution, inclined angle of plane electrodes, particle rebounding, particle charge decay rate after impact on the electrode surface, etc., in order to determine the optimal design conditions. The present predicted results for the cumulative yield represent well the experimental ones.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2003년도 가을 학술발표회 논문집
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• pp.441-444
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• 2003

Polymer concrete has more useful than cement concrete in the strength and durability. So, it is widely utilizing as panel for wall, manhole for communication, foundation and underground connection box, etc. But polymer concrete is a defect that is disadvantageous in economical aspect because cost of resin is expensive. Polymer concrete (PC) using unsaturated polyester resins based on recycled polyethylene terephthalate(PET) plastic waste were used in our study for grasping its mechanical properties such as compressive strength, tensile strength, flexural strength and chemical resistance was tested by dealing with 20% HCl, 30% NaOH. As a result of it, compressive, tensile and flexural strength of PC indicated 752kgf/$\textrm{cm}^2$, 80kgf/$\textrm{cm}^2$ and 243kgf/$\textrm{cm}^2$ kind of satisfaction successively. Also, properties of chemical resistance are superior to those of cement concrete.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 The 6th International Symposium of East Asian Resources Recycling Technology
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• pp.734-737
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• 2001

A study was conducted in order to remove PVC from the waste plastic film mixture. The fittings of Air Table was modified to increase the separation efficiency of PVC. By using the improved air table, the PE and PVC was successfully separated from PVC-PE film mixture with the yield of PE 90% or more and with the content of PVC in PE 1% or less. The detail of the separation condition and result will be discussed in this paper.