• 제목, 요약, 키워드: Recyclable

검색결과 185건 처리시간 0.039초

국내 재활용품 선별시설에서 선별 현황 및 개선방안 (Investigation on Sorting Efficiency for Recyclable Materials and Its Improvement Measure at Domestic Sorting Facility)

  • 김주신;박대원
    • 유기물자원화
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    • v.25 no.2
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    • pp.15-26
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    • 2017
  • 본 연구는 S시 S구의 재활용품 배출특성을 조사 및 분석을 통해 재활용품 선별장에서 재활용품 선별율을 조사하였다. 재활용품 배출특성을 조사하기 위해서 발생원, 수집운반, 선별단계별로 나누어 분석하였다. 분석결과, 재활용품의 발생량 원단위의 전체 평균은 0.121kg/일 인, 지역별 재활용품의 수거주기는 보통 주3회(월수금 혹은 화목일)로 나타났으며, 차량별 혼합재활용품의 밀도는 평균 $202.4kg/m^3$로 나타났다. 선별단계에서의 현황분석을 진행한 결과, 혼합재활용품의 반입량은 평균 1,154.6톤/달, 겉보기밀도의 평균은 $181kg/m^3$, 선별재활용품의 양은 평균 448.5kg/달, 잔재물의 밀도는 $48kg/m^3$으로 나타났다. 선별장으로 입고된 혼합재활용품에서 유가품 선별율은 약 38.85%이며 잔재물은 약 55.90%로 나타났다. 전체 잔재물 7,744.8톤 중 유가품은 약 4,272.1톤이 존재하는 것으로 나타났다. 활용가능한 유가품의 수거효율을 높이기 위한 방안으로는 거점수거 활성화, 선별시설 자동화 및 현대화, 잔재물의 자원화 등이 검토되었다.

미세분급 방법 개선에 의한 재생시멘트의 성능 평가 (An Evaluation on the Performance of Recyclable Cement by Micron Separating Method)

  • 홍영태;김세영;고은혜;오상균
    • 한국건축시공학회:학술대회논문집
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    • pp.39-42
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    • 2006
  • In this study, there is purpose that is on a concrete defect happen from aggregate minute's particle mixing in process that make waste concrete as recyclable cement puts to practical use constructing basic data for design of mix proportion used recyclable cement and solves strength fall problem using micron separator, and does general recyclable cement high quality. As a result of X-ray diffraction(XRD) of rater HR-C than NR-C is aware that it come out the micron-separating to decrease the $SiO_2$-peak below 50%. And a construction field which apply for strength's $24{\sim}28MPa$ HR-C in order to realize NR-C of 44% and 51%. Recycle concrete capacity through improved recycle cement of manufacturing technique by micron-separating's new distribution more better improvement. Therefore, in this study, it need to more various study a recycle cement of high quality for reasonable and utility recycling than disposal concrete.

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재활용 생활계 폐기물의 수거경로와 지역적 특성 (Channel of Collection and Regional Characteristics of Recyclable Domestic Wastes)

  • 한주성
    • 대한지리학회지
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    • v.39 no.1
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    • pp.88-101
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    • 2004
  • 본 연구는 재활용 생활계 폐기물의 수거경로를 살펴보고, 재활용품에 의한 수거유형과 지역특성과의 관계를 밝히는 것을 목적으로 한다. 분석결과는 다음과 같다. 인구규모가 크고 증가율이 높으며 제2차 산업 인구구성비와 재정자립도가 높은 지역에서는 종이류와 고철류가 주로 수거되고, 인구규모가 작고 증가율도 낮거나 감소하며, 제1차 산업 인구구성비와 농가율이 높은 농촌지역에서는 기타를 포함하여 고철류, 종이류, 병류 등의 다양한 수거가 나타난다. 이는 지역에 발달한 산업에 의해 재활용 생활계 폐기물의 수거유형이 다르다는 것을 의미한다.

Optimal Operation for Green Supply Chain with Quality of Recyclable Parts and Contract for Recycling Activity

  • Kusukawa, Etsuko;Alozawa, Sho
    • Industrial Engineering and Management Systems
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    • v.14 no.3
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    • pp.248-274
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    • 2015
  • This study discusses a contract to promote collection and recycling of used products in a green supply chain (GSC). A collection incentive contract is combined with a reward-penalty contract. The collection incentive contract for used products is made between a retailer and a manufacturer. The reward-penalty contract for recycling used products is made between a manufacturer and an external institution. A retailer pays an incentive for collecting used products from customers and delivers them to a manufacturer with a product order quantity under uncertainty in product demand. A manufacturer remanufactures products using recyclable parts with acceptable quality levels and covers a part of the retailer's incentive from the recycled parts by sharing the reward from an external institution. Product demand information is assumed as (i) the distribution is known (ii) mean and variance are known. Besides, the optimal decisions for product quantity, collection incentive of used products and lower limit of quality level for recyclable parts under decentralized integrated GSCs. The analysis numerically investigates how (1) contract for recycling activity, (ii) product demand information and (iii) quality of recyclable parts affect the optimal operation for each GSC. Supply chain coordination to shift IGSC is discussed by adopting Nash Bargaining solution.

재활용을 고려한 제조시스템의 생산계획 (Production planning for recycle-oriented manufacturing system)

  • 이경근;송수용;류시욱;윤상국
    • 한국경영과학회:학술대회논문집
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    • pp.530-533
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    • 2000
  • Recently, Manufacturers have recognized the importance of recycling because of the limitation of natural resources and new and proposed laws and legislations that assign responsibility to manufacturer for the ultimate disposal of their products and the environmental problems. In this paper, products assembled recyclable parts and non-recyclable parts are collected after consumer usage and go into a plant. And the collected recyclable parts are disassembled through the disassembly process and have three attributes - re-usable attribute, re-manufacturing attribute and dumping attribute. In this situation, we deal with a production planning for recycle-oriented manufacturing system. The proposed model maximizing the profit in a system is formulated as a mixed-integer linear programming. And then a numerical example is used to evaluate the effectiveness of the proposed model

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Synthesis of 2-Substituted Benzofurans from o-Iodophenols and Terminal Alkynes with a Recyclable Palladium Catalyst Supported on Nano-sized Carbon Balls under Copper- and Ligand-Free Conditions

  • Yum, Eul Kgun;Yang, Ok-Kyung;Kim, Ji-Eun;Park, Hee Jung
    • Bulletin of the Korean Chemical Society
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    • v.34 no.9
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    • pp.2645-2649
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    • 2013
  • We have developed a one-step synthesis of benzofurans from o-iodophenol and various terminal alkynes, by using Pd catalyst supported on nano-sized carbon balls (NCB) under copper- and ligand free conditions. This recyclable catalyst could be reused more than 5 times in the same heteroannulation reaction. The results have demonstrated that diverse 2-substituted benzofurans with tolerant functional groups can be prepared simply and conveniently under these conditions.

Synthesis of Quinoxaline Derivatives Using TiO2 Nanoparticles as an Efficient and Recyclable Catalyst

  • Alinezhad, Heshmatollah;Tajbakhsh, Mahmood;Salehian, Fatemeh;Biparva, Pourya
    • Bulletin of the Korean Chemical Society
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    • v.32 no.10
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    • pp.3720-3725
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    • 2011
  • $TiO_2$ nanoparticles were synthesized and characterized by SEM and XRD techniques. The $TiO_2$ nanoparticles were employed as a recyclable, inexpensive and efficient catalyst for the synthesis of substituted quinoxalines in high to excellent yields and in relatively short duration.

Montmorillonite KSF Clay as Novel and Recyclable Heterogeneous Catalyst for the Microwave Mediated Synthesis of Indan-1,3-Diones

  • Marvi, Omid;Giahi, Masoud
    • Bulletin of the Korean Chemical Society
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    • v.30 no.12
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    • pp.2918-2920
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    • 2009
  • Various indan-1,3-dione derivatives were synthesized from the reaction of different phthalic anhydrides with diethylmalonate using montmorillonite KSF clay as a recyclable heterogeneous acidic catalyst and microwave irradiation in good yields and short reaction times.

고역률 LED 구동회로의 효율화에 관한 연구 (A Study on the Efficiency of a High Power Factor LED Driver Circuit)

  • 이동원;김병철
    • 한국전기전자재료학회논문지
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    • v.26 no.8
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    • pp.629-634
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    • 2013
  • The rectified voltage supplied to LED lamp is used in load and then the surplus voltage can be produced in LED lighting. In this case, LED lighting is proposed that can recyclable the excess voltage to supply power to the controller.