• Title, Summary, Keyword: Recyclable

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

  • Kim, Joo-Sin;Pak, Daewon
    • Journal of the Korea Organic Resources Recycling Association
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    • v.25 no.2
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    • pp.15-26
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    • 2017
  • This study was conducted to investigate and analyze the discharge characteristics of recyclable material from S-city, S-district, in order to improve the sorting efficiency in recycling sorting facility. The characteristics of recyclable materials collected were analyzed in three different scopes; source origin, collection and transportation, and sorting steps. The average of recyclable waste generation is $0.121kg/day^*man$. Regional collection period appears to be three times a week, and the density of mixed recyclable wastes showed the average of $202.4kg/m^3$ in the waste collection vehicle. In the analysis into the sorting steps, the average of carrying amount of mixed recycling products is 1,154.6 ton/month, the average of appeared density is $181kg/m^3$, the average amount of separated recycling products is 448.5kg/month, and the density of recycling residue is found out to be $48kg/m^3$. The sorting rate of recyclable material is 38.85% and the percentage of residues is 55.90%. Out of 7,744.8 tons of the total recyclable residues, 4,272.1 tons were found out to be possible recylable materials. As a result of increasing the recycling rate of residues, the encouragement of base-recycling, the automation and retrofit of sorting equipment, and energy recovery from recycling residue were discussed.

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

  • Hong, Young-Tae;Kim, Sae-Young;Ko, Eun-Hye;Oh, Sang-Gyun
    • Proceedings of the Korean Institute of Building Construction Conference
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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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Channel of Collection and Regional Characteristics of Recyclable Domestic Wastes (재활용 생활계 폐기물의 수거경로와 지역적 특성)

  • 한주성
    • Journal of the Korean Geographical Society
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    • v.39 no.1
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    • pp.88-101
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    • 2004
  • This paper aims to examin the channel of waste collection, as well as to clarify the relationship between collection types and regional characteristics. According to the analysis results, a kind of used paper and old metal are mainly collected in regions which have a large population size, high population increasing rates, high population composition rates of secondary industry and high degree of self-supporting in public finance. On the other hand, in regions which have a small population size, low population increasing rates or a decrease in population, and high population composition rates of primary industry and rates of agricultural household, there are high collection rates for others recyclable wastes, a kind of scrap iron, used paper, and used bottle. These results show that the collection types of recyclable domestic wastes are different depend on industry developed degree in region.

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.

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

  • 이경근;송수용;류시욱;윤상국
    • Proceedings of the Korean Operations and Management Science Society Conference
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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.

Chemoselective Synthesis of 2-Aryl-1-arylmethyl-1H-benzo[d]imidazoles Using Indion 190 Resin as a Heterogeneous Recyclable Catalyst (회수 가능한 indion 190 resin 촉매를 이용한 2-aryl-1-arylmethyl-1Hbenzo[d]imidazoles계 화합물의 선택적인 합성)

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.

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

  • Lee, Dong Won;Kim, Byungcheul
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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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.