• 환경위생공학
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• 제12권2호
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• pp.23-28
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• 1997

This study was conducted to know the possibility of reducing lime dosage by recycling sludge from bleaching wastewater lime coagulation settlement treatment at pulp mill process. In case of bleaching wastewater at the pulp mill process, when the lime dosage was increased, the removal efficiency of TSS(Total Suspended Solids) was increased, proportionally, but the organic removal efficiency was increased very slowly. It was concluded that sludge recycling at the lime coagulation settlement process was effective method to reduce the requirement of lime dosage. At the lime coagulation settlement process with sludge recycling, when the recycling number was increased, the organic removal efficiency was decreased, sharply. It was evaluated that the pH could be the basic standard for lime supplement by sludge recycling.

• 자원리싸이클링
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• 제22권4호
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• pp.70-80
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• 2013

냉장고는 폐 전기전자제품(WEEE)에서 가장 많은 양이 처리되고 있는 품목이며 또한 가장 재활용이 복잡한 공정이다. 이는 가전제품 중 부피와 중량이 가장 크며 철, 비철금속, 플라스틱(PP, PS, ABS)등으로 이루어진 다양한 부품과 소재를 사용하고 있기 때문이다. 특히 최근에는 대용량 양문형 냉장고나 스탠드형 김치냉장고 등의 새로운 모델 출시와 더불어 다양한 혼합 재질의 사용으로 인해 폐 냉장고 재활용 공정의 어려움이 더욱 증가되고 있다. 뿐만 아니라 국내외 WEEE 재활용 관련 입법의 도입으로 폐 냉장고의 재활용 및 재자원화는 필수이고 관련 자원순환기술개발은 국가 기술경쟁력의 강화 및 국제 환경규제 대응 측면에서도 매우 중요하다고 할 수 있다. 따라서 현재 우리나라의 폐 냉장고 재활용 처리 및 기술개발 현황을 분석하고 선진국의 재활용 기술을 비교 분석하고자 한다.

• 한국환경교육학회지:환경교육
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• 제11권1호
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• pp.181-194
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• 1998

This study is for rationalizing the collecting system of recycling waste materials in elementary, middle and high school in Incheon. The student participating in collecting system is so much helpful in env. educational aspect, So the students need to be took part in the system. The result on investigating actual condition of the student's participating of schools in Inchon City is not sufficient to be helpful to env. educational effect. 1st. The names of recycling waste can are so various that the students can's understand which can in for Recycling. 2nd. Collecting system is also very different according to schools. 3th. The incentives for student's participating in collecting process are also not sufficient. The conclusion is that the school should provide the students incentives for taking parts in the collecting process, in that actualizing the recycling process is helpful to env. education, and the another one in that we should remove the recycling ideology, which is the some belief, the more production is no problems, if recycling is activated socially. But this idea is evident error. In this aspect the concept of recycling should be changed from re-using to re-turning to nature.

• 한국자원리싸이클링학회:학술대회논문집
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• 한국자원리싸이클링학회 2003년도 추계정기총회 및 국제심포지엄
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• pp.17-21
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• 2003

• 자원리싸이클링
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• 제25권2호
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• pp.17-24
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• 2016

본 연구에서는 폐소형가전 재활용을 위한 파쇄, 선별 및 회수 공정에 대해 전과정평가(Life Cycle Assessment, LCA) 기법을 활용하여 환경영향을 분석하였다. 폐소형가전 파쇄, 선별 및 회수 공정의 지구온난화(Global Warming Potential, GWP)에 대한 환경영향은 $1.29E+02kg\;CO_2-eq./kg$으로 분석되었으며, 가중치 결과 1.17E-02Pt로 지구온난화(GWP)에 대한 환경영향의 경우 전체 환경영향의 약 57.1%, 자원고갈(ADP) 약 35.4%, 광화학산화물 형성(POCP) 약 4.8% 등이었다. 유용자원 1톤을 선별/회수하는 공정의 지구온난화(GWP)에 대한 환경영향은 플라스틱류 즉, ABS 33.7%, PP와 HIPS가 각각 약 16.8%, 철금속류 약 9.4% 등으로 플라스틱류의 선별/회수공정의 경우 지구온난화에 대한 환경영향이 가장 큰 것으로 분석되었다. 또한, 유용자원을 회수하여 재활용하므로서 신재 생산보다 지구온난화(GWP) 환경영향에 대하여 약 $2.73E+04ton\;CO_2-eq./ton$의 환경회피 효과가 발생하였으며, 이는 연간 약 48,236.4천원의 경제적 효과가 발생하는 것으로 조사되었다. 폐소형가전으로부터 유용자원을 효율적으로 재활용할 경우 지구온난화(GWP)에 대한 환경영향을 줄여 기후변화 대응에 효과적일 것으로 사료된다.

• International Journal of Automotive Technology
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• 제6권4호
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• pp.413-419
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• 2005

The United States automotive recycling infrastructure has successfully reduced the amount of automotive waste sent to landfills, especially since the introduction of shredders in the late 1950s. Shredders are necessary to process and recycle automotive hulks and other durable goods. However, this industry faces significant challenges as the automotive manufacturers are increasing the use of nonmetallic components which are difficult to recycle. Additionally, it is becoming obvious that automobiles contain hazardous materials which place heavy burdens on the environment. To address this growing concern, we propose a process planning model for automotive shredders to make tactical decisions regarding at what level to process and at what level to reprocess feed stock materials. The purpose of this paper is to test analytical models to help shredders improve the profitability and efficiency of the bulk recycling processes for end of life automobile returns. The work is motivated by an actual recycling problem that was observed at Capitol City Metals shredding facility in Indianapolis, Indiana.

• 한국응용과학기술학회지
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• 제28권1호
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• pp.6-9
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• 2011

Step feed process was analyzed stoichiometrically for the optimal operation conditions in this study. In case of optimal operation conditions, minimum R (sludge recycling) value, r (internal recycling ratio) value, and n (influent allocation ratio) value for the step feed process to acquire the maximum TN removal efficiency were identified by theoretical analysis. Maximum TN removal efficiency, based on stoichiometric reaction, can be obtained by controlling n value for the step feed process.

• Nuclear Engineering and Technology
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• 제53권6호
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• pp.2019-2024
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• 2021

For evaluating the radiological safety of dismantled concrete, the process of disposal and recycling of the radioactive concrete generated during the dismantling of Kori Unit 1 is analyzed. Four scenarios are derived based on the analysis of the concrete recycling and disposal process, and the potential exposure to the workers and public during this process are calculated. VISIPLAN and RESRAD code are used for evaluating the dosages received by the workers and public in the following four scenarios: concrete inspection, transport of concrete by the truck driver, driving on a recycled concrete road, and public living near the landfilled concrete waste. Two worker exposure scenarios in the processing of concrete and two public exposure scenarios in recycling and disposal are considered; in all the scenarios, the exposure dose does not exceed the annual dose limit for each representative.

• 자원리싸이클링
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• 제20권1호
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• pp.3-13
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• 2011

대만의 제강생산량은 21,290천톤이고, 전기로제강량은 제강생산량의 약 반, 즉 11,200천톤이다. 그리고 이 전기로 제강시 발생되는 더스트량은 160천톤(2009년도)이다. Walcz 프로세스(탄소강 EAF 더스트)에서 약 70천톤, RHF/SAF 프로세스(스테인레스강 EAF 더스트)에서 약 60천톤을 처리하고 있다. 그리고 약 90천톤/년의 조산화아연(ZnO)이 생산되고 있는 것으로 추정된다. 현재 새로운 EAF 더스트 리싸이클링법이 개발되고 있고, 조산화아연의 품위향상이 앞으로 과제이다.

• 경영과학
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• 제31권1호
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• pp.1-15
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• 2014

As the scarcity of natural resources has become apparent, the recycling industry has emerged as a promising one for its growth potential. Yet, the recycling industry still remains undeveloped and inefficient for various reasons. In this study, we focus on firms' recycling processes to understand the current status of recycling firms' value creation activities. With respect to the adopted recycling processes, we empirically investigate the differences in firm characteristics and firm performance. We use the data from Keco (Korea Environment Cooperation) which annually conducts a survey of recycling firms in Korea. We exclusively consider the whole group of plastic recycling industry in order to control for a possible bias in firm performance, stemming from the heterogeneity in processing and recycling of materials other than plastics. We review the descriptive statistics from the sample firms and conduct a series of hierarchical regression analyses. The results show that most of the firms in this industry adopt physical transformation processes with a low-level technology. These firms with physical transformation processes are smaller in size and produce entry level items which do not secure higher margins. The results indicate that the recycling industry largely comprises low value added firms which lack economies of scale and resources for R&D. For the stable growth of the industry, recycling firms must create sustainable values through implementation of technology-driven processes and improvement in product quality. In addition, the government should help build a reliable reverse logistic network, lower the entry barriers, and provide necessary funding for the SMEs in the recycling industry.