Implementing Circular Economy in municipal solid waste treatment system using P-graph

Yee Van Fan, Jiří Jaromír Klemeš, Timothy Gordon Walmsley, Botond Bertók

Research output: Contribution to journalArticle

Abstract

Municipal solid waste (MSW) is one of the issues associated with the growth of economic and urban population. The aim of this study is to develop an integrated design of waste management systems in support of a Circular Economy by P-graph (a bipartite graphical optimisation tool) as an effective decision support tool. The case study considers four MSW compositions based on different country income levels. Solving the P-graph model identifies the most suitable treatment approaches, considering the economic balance between the main operating cost, type, yield, quality of products, as well as the GHG emission (externality cost). The identification of near-optimal solutions by P-graph is useful in dealing with the trade-offs between conflicting objectives, e.g. local policy and practical implementation, that are difficult to monetise. For a lower-income country, the optimal solution includes a combination of at source separation, recycling, incineration (heat, electricity), anaerobic digestion (biofuel, digestate) and the landfill. It avoids an estimated 411 kg CO2eq/t of processed MSW and achieves a potential profit of 42 €/t of processed MSW. The optimisation generally favours mechanical biological treatment as the country income level rises, which affects the composition of the MSW. The relative prices of biofuel, electricity and heat (>20%) cause a significant impact on the highest-ranking treatment structure and overall profit. This study shows that the developed framework by P-graph is an effective tool for MSW systems planning. For future study, localised data inputs can be fed into the proposed framework for a customised solution and economic feasibility assessment.

Original languageEnglish
Article number134652
JournalScience of the Total Environment
Volume701
DOIs
Publication statusPublished - Jan 20 2020

Fingerprint

Waste treatment
Municipal solid waste
waste treatment
municipal solid waste
Biofuels
income
biofuel
Economics
Profitability
electricity
Electricity
Source separation
Waste incineration
Anaerobic digestion
planning system
urban population
Waste management
Land fill
incineration
Chemical analysis

Keywords

  • Circular Economy
  • GHG emission
  • P-graph
  • Waste to resources

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Cite this

Implementing Circular Economy in municipal solid waste treatment system using P-graph. / Fan, Yee Van; Klemeš, Jiří Jaromír; Walmsley, Timothy Gordon; Bertók, Botond.

In: Science of the Total Environment, Vol. 701, 134652, 20.01.2020.

Research output: Contribution to journalArticle

Fan, Yee Van ; Klemeš, Jiří Jaromír ; Walmsley, Timothy Gordon ; Bertók, Botond. / Implementing Circular Economy in municipal solid waste treatment system using P-graph. In: Science of the Total Environment. 2020 ; Vol. 701.
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