• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1998년도 가을 학술발표회 논문집(I)
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• pp.167-172
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• 1998

The purpose of this study is recycling of ready mixed concrete sludge as artificial aggregate by product technique of artificial aggregate in the normal temerature. For the qulity test of artificial aggregate using ready mixed concrete sludge, it is tested in the various aspect. Therefor, Quality of artificil aggregate is suitable as coarse aggregate except absoption, abrasion. For the application of aggregate in cement concrete, Coarse aggregate are replaced with artificial aggregate using ready mixed concrete sludge 100% of volume. The results of test shown that the artificial aggregate using ready mixed concrete sludge could be used replacement of coarse aggregate in cement concrete.

• 한국자원리싸이클링학회:학술대회논문집
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• 한국자원리싸이클링학회 2005년도 추계정기총회 및 제26회 학술발표대회 고분자리싸이클링기술 특별심포지엄
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• pp.163-167
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• 2005

• 자원리싸이클링
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• 제4권4호
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• pp.12-15
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• 1995

In this paper, some representative waste tire pyrolysis were investigated together with the analysis of the problems associated with the commercialization of various waste tire treatment technologies. Also, R & D results on recovering the oil from the pyrolysis of waste tires, when waste oil was used as a heating medium, were summarized in this study. Experimental results show that the present pyrolysis process has both lower pyrolytic temperature and higher pyrolysis rate than usual one and that the quality of the product oil and residue obtained was relatively even with large availability.

• 자원리싸이클링
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• 제19권4호
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• pp.13-18
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• 2010

세계 각국은 폐기물의 발생과 이의 처리를 위해 많은 노력을 기울이고 있다. 폐기물 중 특히 폐알칼리는 부식성으로 인해 환경오염에 대한 위험성이 높기 때문에 효율적 관리를 통해 재활용되어야 하며, 이를 위해 재활용 생성물에 대한 품질기준에 따라 관리될 필요가 있다. 그러나 현재 품질관리가 필요한 대상물질에 대한 국내 자료가 전혀 없다. 따라서 본 연구에서는 최근 5년간의 자료 분석과 현장방문을 통해 체계적인 관리가 필요한 폐알칼리 재활용 대상물질을 선정하였다. 그 결과 재활용 대상 주요물질은 가성소다, 황산알루미늄, 폴리염화알루미늄인 것으로 나타났다. 장차 국가적 차원에서 이들 주요물질에 대한 적절한 관리체계가 구축될 필요가 있는 것으로 판단되며, 이를 통하여 폐기물의 자원화 뿐 아니라 우리 주변의 환경오염을 막는 긍정적인 효과가 있을 것으로 기대된다.

• 복식문화연구
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• 제31권2호
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• pp.141-160
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• 2023

Controlling fashion waste throughout the entire product lifecycle is critical in a circular economy. This study explored the possibility of establishing a public recycling system for fashion waste. Since consumer interests and participation are essential, theoretical research, social-text analysis, and quantitative research were conducted to identify consumers' perceptions of the public recycling of fashion waste and circular fashion. Data were collected via an online survey among women in their 20-30's living in Korea, and 304 samples were used for data analysis. The results were as follows. First, consumers' perceptions of recycling fashion waste were composed of recycling difficulty, the need for public recycling, and the need for EPR. Circular fashion perception comprised favor, environment protection, attractiveness, economics, quality and hygiene risks, and lack of diversity. Second, the reuse-recycle attitude and need for EPR affected the favor of all types of circular fashion products. Third, environmental concerns impacted attractiveness, and the favor significantly affected the purchase intention of all types of circular fashion products. In particular, quality and hygiene risk negatively affected the purchase intention of used-fashion products, while attractiveness positively impacted the purchase intention of upcycled-fashion products. The results implied that discussing the public recycling system of fashion waste and EPR policy is imperative. The results also showed the need to classify different types of circular fashion products, such as used, upcycled, and regenerated fashion items, to examine consumers' perceptions. In addition, the recycling of the fashion waste scale developed in this study could be used for further research.

• 유기물자원화
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• 제9권2호
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• pp.77-86
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• 2001

As construction and expansion of wastewater treatment works is continuing, generation of sludge is increasing. Bur most sludge is not used appropriately but disposed by landfill dumping to sea. Furthermore direct landfilling of sludge cake containing moisture content over 75% has been legally prohibited since 2001 that's enforcement will be more strict in 2003. Such a situation means nowadays recycling of organic waste such as sludge and food waste is necessary. Composting is one of recycling methods commonly and used as an effective means of stabilizing organic waste and then compost can be used as fertilizer. However fertilizer law management which include standard of compost products and other fertilizers applied all sludge products indiscriminiately and was not flexible. So MOE has graded organic composts according to land applications to improve recycle of organic wastes. The classified organic compost which contains low contaminants has been possible to use as various purpose. This study enalyzed 30 samples which were raw materials for compost and compost products management well and to estimate the quality of compost products. Heavy metals were measured in Raw materials and OM/N, NaCl and VS were tested in compost products as well as heavy metals. As a result, approximate 10% of raw materials was not suitable to the grade A and 6.7% over the grade B of the regulation on raw materials for compost. In the case of 30 produced compost propducts approximate, 57% of composts was not compatible with the grade A and B of the regulation on composting product. The qualities of compost products were worse than raw materials, because the compost products have more regulation item raw materials have.

• 한국건설순환자원학회지
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• 제11권3호
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• pp.25-28
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• 2016

• 한국건설순환자원학회지
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• 제10권4호
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• pp.33-43
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• 2015

• Journal of the Korean Wood Science and Technology
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• 제48권3호
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• pp.405-413
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• 2020

Recycling of ionic liquid (1-ethyl-3-methylimidazolium acetate, [EMIM]Ac) after the pretreatment of Salix gracilistyla Miq. was conducted and the effect of the recycling number on the enzymatic saccharification yield was investigated. Enzymatic saccharification was performed using an enzyme cocktail (Acremonium cellulase and Optimash BG) at 50 ℃ for 72 h. All recycled [EMIM]Ac samples showed a lower amount of water soluble fraction than pure [EMIM]Ac. On increasing the recycling number from 1 to 4, the amount of water soluble fraction decreased from 18% to 15%. The X-ray diffraction pattern of the products pretreated with recycled [EMIM]Ac showed cellulose I crystalline polymorph. The crystallinity of the product pretreated with recycled [EMIM]Ac was 47-49%, which was lower than 33% of that with pure [EMIM]Ac. The yields of glucose and xylose decreased in the pretreatment with recycled [EMIM]Ac compared to that with pure [EMIM]Ac.

• 한국정밀공학회지
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• 제20권5호
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• pp.232-240
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• 2003

In this paper, a method of disassembly time evaluation for a product has been proposed. The product designer can predict the ability of disassembly for a given product in terms of time by considering a type, size, weight, connection parts, and the movement distance of the product. The equation for calculating disassembly time were derived by applying the basis motion status of worker and some informations of connection parts, various tools, and many different type of assembly structures. The developed method of evaluating disassembly time has been applied to disassemble the product by manual labor. The proposed method has shown that the actual disassembly time was well predicted.