Economic and environmental assessment of organic waste to biomethane conversion

Gupta, R. , Miller, R., Sloan, W. and You, S. (2022) Economic and environmental assessment of organic waste to biomethane conversion. Bioresource Technology, 345, 126500. (doi: 10.1016/j.biortech.2021.126500) (PMID:34890814)

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Abstract

Biomethane and biofertilizer production by anaerobic co-digestion of organic waste serves a promising method for reducing the environmental footprint of organic waste management. This study evaluated the techno-economic feasibility and environmental impacts of organic waste-to-biomethane development in Glasgow, UK using net present value (NPV) analysis and life cycle assessment. Four different biogas upgrading technologies (pressurized water scrubbing, chemical scrubbing, membrane separation, and pressure swing adsorption) were compared. The membrane separation technology-based biomethane production meets 0.8% of the gas demand for Glasgow households with a conversion efficiency of 83%. The organic waste-to-biomethane development saved up to 264 kg CO2-eq annually per tonne of waste treated, with an NPV ranged between £-9.0 million and £-12.0 million based on the upgrading technology. High costs for waste collection and transportation are primarily responsible for the negative NPV. Carbon taxes between £31.30 and £58.02 per tonne of CO2 are needed for economically viable biomethane production.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Gupta, Dr Rohit and You, Dr Siming and Sloan, Professor William
Authors: Gupta, R., Miller, R., Sloan, W., and You, S.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Bioresource Technology
Publisher:Elsevier
ISSN:0960-8524
ISSN (Online):1873-2976
Published Online:07 December 2021
Copyright Holders:Copyright © 2021 Elsevier Ltd.
First Published:First published in Bioresource Technology 345: 126500
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
309846Decentralised water technologiesWilliam SloanEngineering and Physical Sciences Research Council (EPSRC)EP/V030515/1ENG - Infrastructure & Environment