• Title, Summary, Keyword: Solid waste management (SWM)

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A comprehensive optimization model for integrated solid waste management system: A case study

  • Paul, Koushik;Chattopadhyay, Subhasish;Dutta, Amit;Krishna, Akhouri P.;Ray, Subhabrata
    • Environmental Engineering Research
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    • v.24 no.2
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    • pp.220-237
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    • 2019
  • Solid waste management (SWM) is one of the poorly rendered services in developing countries - limited resources, increasing population, rapid urbanization and application of outdated systems leads to inefficiency. Lack of proper planning and inadequate data regarding solid waste generation and collection compound the SWM problem. Decision makers need to formulate solutions that consider multiple goals and strategies. Given the large number of available options for SWM and the inter-relationships among these options, identifying SWM strategies that satisfy economic or environmental objectives is a complex task. The paper develops a mathematical model for a municipal Integrated SWM system, taking into account waste generation rates, composition, transportation modes, processing techniques, revenues from waste processing, simulating waste management as closely as possible. The constraints include those linking waste flows and mass balance, processing plants capacity, landfill capacity, transport vehicle capacity and number of trips. The linear programming model integrating different functional elements was solved by LINGO optimization software and various possible waste management options were considered during analysis. The model thus serves as decision support tool to evaluate various waste management alternatives and obtain the least-cost combination of technologies for handling, treatment and disposal of solid waste.

Appropriate Technologies for Municipal Solid Waste Management in Bantayan Island, Philippines

  • Yu, Kwang Sun;Thriveni, Thenepalli;Jang, Changsun;Whan, Ahn Ji
    • Journal of Energy Engineering
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    • v.26 no.1
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    • pp.54-61
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    • 2017
  • In general, solid waste arises from lots of human activities such as domestic, agricultural, industrial, commercial, waste water treatment, construction, and mining activities etc. If the waste is not properly disposal and treated, it will have a negative impact to the environment, and hygienic conditions in urban areas and pollute the air with greenhouse gases (GHG), ground water, as well as the soil and crops. In this paper, the Carbon Resources Recycling Appropriate Technology Center feasibility studies are reported at Bantayan Island, Philippines on the municipal solid waste management. The present objective of our study is to characterize the municipal solid waste incineration (MSWI) bottom ash and case study of MSWI production status in Bantayan, Philippines. Currently, wide variety of smart technologies available for MSWI management in developed countries. Recycling is the other major alternative process for MSWI landfill issues. In this paper, the feasibility studies of applied appropriate technologies for the municipal solid waste generation in Bantayan Island, Philippines are reported.

Current treatment and disposal practices for medical wastes in Bujumbura, Burundi

  • Niyongabo, Edouard;Jang, Yong-Chul;Kang, Daeseok;Sung, Kijune
    • Environmental Engineering Research
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    • v.24 no.2
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    • pp.211-219
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    • 2019
  • Since improper management practices of solid medical waste (SMW) could potentially result in serious health risks and environmental problems, it is very important to properly treat and dispose of the medical wastes. In this study, current practices of SMW management from storage to final disposal stage in 12 health care facilities (HCFs) of Burundi were investigated using the official government reports. The results showed that 75% and 92% of HCFs used uncovered wheelbarrows and trucks for on-site or off-site SMW transportation, respectively, indicating that most transportation equipment and waste workers are not safely protected. The results also showed that 92.8% of SMW (15,736.4 ton) from all 12 HCFs were inappropriately disposed of through uncontrolled land disposal and incineration. If pharmaceutical wastes and discarded medical plastics (29.5% of SMW) can be separated and treated properly, the treatment costs can be reduced and resource savings can be achieved. Raising awareness of healthcare workers and general public about potential health effects arising from improper SMW management, sufficient financial and human resources for the treatment facilities (especially incinerators), and effective regulations and guidelines for transportation and treatment of SWM are some of the major tasks for safe and sustainable medical waste management in Burundi.

Solid Waste Management of Nepalese Municipalities (네팔 지방자치단체의 폐기물관리 정책)

  • Sigdel, Abinashi;Koo, Jakon
    • Journal of Environmental Impact Assessment
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    • v.21 no.6
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    • pp.951-964
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    • 2012
  • 네팔 지방자치단체의 고형폐기물 관리 부서는 도시계획 및 개발국이나 환경위생 부서 또는 일반 복지 부서에서 담당한다. 네팔에는 폐기물관련법과 기준, 지침이 제정되어 있으며 지방자치단체법에 의해 지방자치단체 여건에 맞게 관련 법률 조항을 개정할 수 있다. 네팔에서 발생하는 가정폐기물의 65%는 유기성 폐기물이나, 폐기물 관리는 아직 체계화되지 않고 있다. 지방 NGOs와 일부 부락이 분리수거와 퇴비화를 실시하고 있으나 병원폐기물과 같은 유해폐기물의 경우 병원이 자체적으로 소각하고 있으며 지방자치단체의 의해 적절히 처리되지 않고 있다. 현재 네팔에서는 폐기물이 비위생 매립 방식에 의해 처리되고 있어서 지방자치단체에서 이를 금지하고 위생매립지를 확대 설치할 계획이다. 그럼에도 불구하고 기술 및 전문인력, 예산의 부족, 민간자본 및 시민들의 참여 부족으로 인해 지방자치단체가 설정한 폐기물관리 목표를 달성하지 못하고 있는 실정이다. 네팔 지방자치단체들이 당면한 시급한 과제는 지속가능한 폐기물관리 계획 및 전략의 수립이다. 네팔 지방자치단체의 폐기물관리 계획은 폐기물의 적정 처리를 위한 제도적 측면의 강화는 물론, 폐기물 분리 배출 및 수거에 시민들의 동참을 이끌어내고 이해관계자의 참여 확대, 폐기물 처리 비용, 폐기물 처리를 위한 적정기술의 개발과 같은 내용을 포괄할 수 있어야 한다.