• 수산해양교육연구
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• 제27권2호
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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.

• 한국자원리싸이클링학회:학술대회논문집
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• 한국자원리싸이클링학회 1993년도 EARTH 발표논문초록
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• pp.18.2-18
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• 1993

• 자원리싸이클링
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• 제22권1호
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• pp.72-79
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• 2013

지구환경 문제 및 건강과 관련하여 친환경 제품 개발에 대한 관심이 날로 증대되고 있으며 사용중 산화 등으로 인하여 발생하는 유해물질이 포함된 동/식물성 유지류 등을 환경친화적 제품으로 재활용하는 것은 매우 중요한 기술이다. 본 연구에서는 동식물폐유지 모노머화 재활용 기술에 대한 특허와 논문을 분석하였다. 분석범위는 1976년 ~ 2012년까지의 미국, 유럽연합, 일본, 한국의 등록/공개된 특허와 SCI 논문으로 제한하였다. 특허와 논문은 키워드를 사용하여 수집하였고, 기술의 정의에 의해 필터링 하였다. 특허와 논문의 동향은 연도, 국가, 기업, 기술에 따라 분석하였다. 이에 전처리 정제, 중합용 모노머화, 중합체 제조 기술 모두 미국이 앞서 있는 것으로 나타났다.

• 자원리싸이클링
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• 제13권1호
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• pp.3-13
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• 2004

바이오매스의 이용은 과거부터 지속되어 왔지만 최근 들어 새로운 대체에너지로의 활용이라는 측면에서 집중적인 연구가 시도되고 있다. 바이오매스를 이용하는 방법으로서의 fast pyrolysis는 다른 방법들보다 고부가가치의 화학물질을 생성할 수 있다는 점에서 크게 주목을 받고 있다. 이 리뷰 논문은 현재 fast pyrolysis를 바이오매스 전환 공정으로 이용하고 있는 실례를 선보이고 그 공정에서 생산되는 생성물인 bio-oil의 특성을 소개하고 있다.

• 한국산업융합학회 논문집
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• 제23권6_2호
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• pp.1081-1091
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• 2020

The most recent issue of offshore plants that produce oil and gas are the decommissioning engineering of aged or discontinued platforms. There are many platforms that are being dismantled in the United States, Europe, and areas in Southeast Asia. In particular, more than 400 old platforms in Southeast Asia (Indonesia, Malaysia) are preparing to dismantle. They are spread out across Southeast Asia with a water level of 50 meters and small-scale of less than 10,000 tons. However, this offshore plant decommissioning market is a very suitable market for small and medium-sized shipyards in Korea to enter with their established equipment and engineers. Platform decommissioning is conducted according to decommissioning procedures. However, there are some difficulties in market advances as no developed case studies or process models are established on how platform structures and components are to be dismantled and how the dismantled material is to be reused and recycled. Therefore, this study presented domestic and foreign regulations on the reuse and recycling of oil and gas producing offshore plant platforms, case analyses on developed decommissioning engineering, platform reuse and recycling guidelines, and platform and pipeline decommissioning processes and methods.

• 자원리싸이클링
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• 제2권2호
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• pp.39-44
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• 1993

어룡탄광에서 산출되는 저질인 무연탄 슬러리를 Oil agglomeration 처리법으로 탈수하여 다음과 같은 결과를 얻었다. 저질 무연탄은 기름과 응집체(COM)를 형성하여 물과의 비중차이에 의해서 약 80%까지 분리되고 이때 COM을 만드는 각각 석유, 경유 또는 중유의 첨가량은 시료량의 10%정도이다. 무연탄에서 가연성분을 회수하고 회분을 제거할 수 있는 능력은 기름의 첨가율, 광액 농도, 광립의 입도, 교반시간, 교반강도에 크게 영향을 받는다. 최적조건인 상태에서 가연물질의 회수율은 약 95%까지 증가되었고, 회분의 함유율은 30%에서 13.5%로 감소되었다.

• 한국자원리싸이클링학회:학술대회논문집
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• 한국자원리싸이클링학회 1993년도 EARTH 발표논문초록
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• pp.5.2-5
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• 1993

• 한국응용과학기술학회지
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• 제27권2호
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• pp.107-113
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• 2010

The object of this research is to conform of practicable possibility and recycling of producing junk after citrus fruits is processed. With extracting d-limonene oil that have 70~90% a component of oil out of junk citrus peel, making certain the about 12000ppm concentration of it. Limonene derived from citrus in jeju using conventional synthetic detergents can be replaced with the development of environmentally friendly natural detergent investigated the possibility. Mostly due to ocean dumping, disposal and cause environmental problems by recycling natural citrus cleaner alternative to the research conducted on the possibility. Cleaning efficiency with temperature did not affect the largest concentrations were able to identify the difference between cleaning efficiency. At least 10% of the d-limonene oil could be from the cleaning performance, increasing the concentration of the cleaning efficiency was increased in size. Ultrasonic is very high removal efficiency under the conditions shown in the cause of pure self-generated ultrasonic cleaning power as co-effects of d-limonene oil appears to chemical cleaning effect of ultrasonic cavitation occurs in the physical cleaning effect due to a combination of synergistic stability is maximized by low concentrations of d-limonene oil in a short time showed an excellent cleaning ability. Having the ability of cleaning at the same time, considering the side recycling in the junk citrus peels reflects possibility of basic materials utility eco-friendly in the skin soap, bath soap, cosmetics etc, through ability of exclusion a contaminant in based cleaning effect(EC) it can prospect substitution effect environmentally in the pre existence synthetic detergents.

• 펄프종이기술
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• 제46권5호
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• pp.69-78
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• 2014

The paper recycling becomes more important technology in terms of the reduction of the municipal waste and of saving natural resource such as wood. However the more utilization of recycled fiber would result in the higher contaminants in the papermaking processes and in the deterioration of the paper quality. The oil marks in the paper products becomes one of the major defects of paper products originated from paper recycling. The coagulation of various stickies in recycled fiber stock led to the oil marks. In this work, we applied functional polymer additives such as the dispersing agents, the fixing agents and the hydrophobic talc powder for the control of those stickies in order to remove the oil marks. The addition of the talc powder showed the great reduction in the oil marks of the packaging paper products. The hydrophobic surface of the talc particles collected the individual sticky materials and prevented their aggregation in the recycled fiber stock, which resulted in the great reduction of the oil marks on the paper products.

• 농업과학연구
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• 제37권3호
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• pp.465-469
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• 2010

In order to develop effective recycling technologies of disused railway wood ties, wood properties and residual creosote oil of wood ties were investigated. Among the total 50 wood ties, 32 wood ties were identified as tropical hardwood tree, such as, Keruing (Dipterocarpus spp.), Kempas (Koompassia malaccensis), Kapur (Dryobalanops spp.) Naytoh (Palaquium rostratum), and so on. Disused wood ties showed mostly sound structure without degradation of cell walls by decay fungi. Disused wood ties showed high strengths of bending and compressive parallel to grain because degradation of wood properties was hardly occurred in use under exterior condition. Disused railway wood ties had relatively poor depth of penetration and residual of creosote oil because of refractory wood structures. These results suggest that disused railway wood ties may be useful as recycling wood wastes.