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A Systems-Engineering Approach to Nation-Scale Problems - Midgley Henshaw Alshuhri.pdf (1.27 MB)

A systems-engineering approach to nation-scale problems: municipal solid waste management in Saudi Arabia

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journal contribution
posted on 2021-08-16, 08:17 authored by William Midgley, Michael HenshawMichael Henshaw, Saleh Alshuhri
The systems-engineering context of the solid waste disposal problem is discussed with a focus on the issues in Saudi Arabia. A methodology was developed for dividing the system of interest into a set of weakly-coupled sub-systems that interact with the narrow system of interest. A model of the narrow system of interest, in this case the municipal solid waste (MSW) system of Saudi Arabia, was then created and validated. The development of this mathematical model is described and is used to investigate a range of scenarios for the future of Saudi Arabia’s MSW system with a time horizon of 30 years. The most effective method uses anaerobic digestion, incineration and recycling to reduce the total mass to landfill over the 30 years by 73% when compared to the default scenario (no action taken). In the final year of the simulation, this method reduces the total annual mass to landfill by 69% when compared to a reasonable source reduction strategy. The energy generated by incineration, is shown to contribute a maximum of 2.3% to the Kingdom’s annual energy production. Lifecycle analysis shows that the best waste management method produces a DALY (disability life year) score which is 2% of the current strategy, even if moderate source reduction is employed. The two newly suggested scenarios are shown to have a net positive impact on the environment due to the recycling of a large part of the waste stream, preventing acidification/eutrophication due to the manufacture of virgin goods.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Systems Engineering

Volume

24

Issue

6

Pages

480-496

Publisher

Wiley

Version

  • AM (Accepted Manuscript)

Rights holder

© Wiley

Publisher statement

This is the peer reviewed version of the following article: Midgley, WJB, Henshaw, MJ de C, Alshuhri, S. A systems-engineering approach to nation-scale problems: Municipal solid waste management in Saudi Arabia. Systems Engineering. 24(6), pp. 480-496. https://doi.org/10.1002/sys.21597, which has been published in final form at https://doi.org/10.1002/sys.21597. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.

Acceptance date

2021-07-19

Publication date

2021-08-13

Copyright date

2021

ISSN

1098-1241

eISSN

1520-6858

Language

  • en

Depositor

Dr Will Midgley. Deposit date: 5 August 2021

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