• Resources Recycling
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• v.19 no.4
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• pp.13-18
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• 2010

Effort of reducing wastes and their recycling is increasing in worldwide. Especially, extreme care for alkali recycling is required because of its environmental pollution and its corrosive characteristics. In order to manage alkali wastes effectively, it is necessary to make quality standards for recycling products from the alkali wastes because there are no quality specifications yet. In this study, we selected several recycling candidates from the alkali wastes based on the analysis of the most recent data of the various industrial sites. As a result, the recycling candidates from the alkali wastes are sodium hydroxide, aluminum sulfate, poly aluminum chloride. It is believed that the proper management system for waste products is required in governmental point of view and it propagates positively for resolving various environmental issues.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06d
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• pp.311-313
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• 2012

연구개발을 통해 얻어진 결과물 자체가 잘 보존되고 관리되면, 기술이전 등 상업화가 가능하다. 그렇지만, 연구 현장에서 연구개발을 통해 얻어진 데이터셋이나 소프트웨어 등 성과물들은 개인별로 관리되고 있거나 제대로 관리되지 않아서, 재사용이 어려운 실정이다. 따라서 국가차원에서는 전체 연구성과물의 메타정보 수집을 통한 연구성과물 현황 관리와 이를 분석한 분석정보의 활용에 중점적으로 노력하고, 실제연구개발을 수행하는 개별 연구원이나 기관들은 연구성과물의 재활용에 초점을 맞춘 성과물 관리가 필요하다. 이를 위해 본 연구에서는 연구개발의 결과물을 관리하기 위한 시스템 아키텍처 설계 방안을 제시한다. 연구성과물의 체계적인 관리를 위해서 연구성과물 등록, 저장, 조회/사용, 관리 등 연구성과물 관리를 위한 프로세스 마련이 필요하고, 개별 연구성과물에 대한 메타항목 정의도 필요하다는 결론을 도출했다. 이를 통해 연구성과물의 재생산을 위한 비용을 절감할 수 있으며, 연구의 연속성이 확보되어 질높은 연구성과를 창출할 수 있는 환경이 마련될 것으로 기대한다.

• Resources Recycling
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• v.5 no.2
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• pp.57-62
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• 1996

The regeneration of wastc piddlng acid from ironmaking industry produces Iron oxides as by products which are used for pigments and raw matcrial of ferrite. Thc impurilies level of iron axides for ferrile arc strictly regalated. Filtrat~on, adsorption medw technique, Fe leaching and ncutralizaiion wcre tried in order to remove silica impurities in the wasb pickling acid solution.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.41 no.2
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• pp.48-61
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• 2012

장래에 일어날 물부족 문제를 해결하고, 오염물질 발생을 저감하기 위하여, 그리고 산업 폐수 처리수의 자원 재활용의 차원에서 물절약에 대한 인식을 재고시켜야 할 것이다.

• Magazine of the Korea Institute for Structural Maintenance and Inspection
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• v.18 no.3
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• pp.68-77
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• 2014

• Journal of the Korea Organic Resources Recycling Association
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• v.27 no.1
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• pp.65-75
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• 2019

The government is promoting recycling of waste resources through the enactment of Fundamental Law on Resource Circulation, the revision of the Wastes Control Act and zero-landfilling of untreated waste through improved processes such as recycling and diversification. As of 2015, the total amount of landfilled waste is 38,308 ton/day in Korea. The amount of landfilled waste from industrial sectors is 23,577 ton/day, accounting for 62 % of total landfilled waste. In the study, we investigated the characteristics of the thermal treatment residue among inorganic wastes and estimated the landfill reduction potential according to the relevant recycling criteria, which can go through recycling paths. As a result, it is estimated that about 5~42 % of the landfilled waste can be reduced in case mandatory recycling and landfill suppression policies such as recycling criteria for thermal processing residues and expansion of recycling obligation targets should be implemented. In order to minimize landfill disposal, it is necessary to expand the diversity of waste recycling type and the usage of recycled products.

• Journal of the Korean Society for Railway
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• v.12 no.4
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• pp.481-487
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• 2009

On the paved track, the railway ballast is used as aggregate for the filling layer using the pre-packed concrete method. The condition of ballast as the paved track aggregate ensure that the compressive strength, particle distribution size for the pouring and surface clearance to increase the adhesive strength with mortar. It is profitable to recycle the existing railway ballast as a economical supply. In order to increase recycling characteristic, it is necessary to apply the similar criterion which does not exceed the conventional railway ballast criterion. Consequently, this paper was to investigate physical characteristics of existing ballast, particle size distribution, compressive and flexural strength, bearing capacity and filling capacity to prepare the aggregate's recycling. As a result, optimized aggregate criterion is suggested.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.49 no.1
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• pp.29-38
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• 2023

In this study, the correlation between recycled plastic pellets and the antioxidant efficacy of the extract of Mucuna pruriens (M. pruriens) was verified. After immersing recycled plastic pellets in M. pruriens extracts, they were stored for 30 days under various temperature conditions, and then analyzed for DPPH radical and ABTS⁺ radical erasing ability, SOD-like activity, total phenol and flavonoid content. Compared to the existing efficacy, DPPH radical elimination showed less than 30% activity change in ECOTRIA and PCR-PP pellets, and the largest decrease in activity of 46.06% was confirmed in Grico pellets. As a result of measuring ABTS⁺ radical erasure ability, less than 5% of efficacy change was confirmed in all pellets. As a result of measuring SOD-like activity, all showed a decrease in activity of more than 30%, and as a result of measuring the total phenol and flavonoid content, all pellets showed a tendency to decrease compared to the existing content. Through this results, it was confirmed that the physiological activity of M. pruriens extract decreased and changed by recycled plastic pellets, and based on the results of this study, recycled plastic pellets are believed to affect the existing efficacy and activity stability of M. pruriens extract.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2017.11a
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• pp.369-386
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• 2017

현재 3D프린터의 원료는 대부분 필라멘트를 사용하고 있는데 가격이 고가인 점과 제작 시간의 문제점으로 3D프린팅 하는데 많은 제약이 따르고 있다. 또한, 원료를 재생 및 재활용하는 3D프린터는 현재까지는 없다. 특히 대형 출력물은 많은 원료가 투입되어야 하기 때문에 제조단가가 상승하고, 그에 따른 3D프린터의 보급과 서비스 확장에도 한계가 있다. 본 연구에서는 현재 재활용되고 있는 플라스틱 소재를 재활용할 수 있는 3D프린터 시스템의 기술개발과 응용서비스를 분석하였다.

• Resources Recycling
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• v.12 no.3
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• pp.46-53
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• 2003

Recycling of aluminum dross is an important issue in the secondary aluminum industries. In this study, aluminum dross generated in the domestic secondary aluminum industry was processed to use it as raw material for producing alumina refractories. Sample dross was classified according to its size. The dross smaller than 1 mm was leached with sodium hydroxide solution to extract the remained aluminum from the dross into the solution. and then aluminum hydroxide precipitate was recovered from the leach liquor. The waste residue in the leaching was washed, dried and roasted. Most remained metallic components in the residue was changed into oxide through the processes. The roasted dross was made into alumina castable refractories by mixing with aggregates and a binder. Bending strength of the tested castable specimen was over $25\;kg/\textrm{m}^2$ and compressive strength over $80\;kg/\textrm{cm}^2$, which satisfied the Korean Standard value respectively. From the results, it was suggested that this process could be applicable to recycling of aluminum dross.