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A techno-economic assessment of implementing power-to-gas systems based on biomethanation in an operating waste water treatment plant

Michailos, Stavros; Walker, Mark; Moody, Adam; Poggio, Davide; Pourkashanian, Mohamed

Authors

Stavros Michailos

Adam Moody

Davide Poggio

Mohamed Pourkashanian



Abstract

The aim of the present study is to assess the techno-economic viability of integrating biomethanation into power to gas systems in a real waste water treatment plant (WWTP). The research is the first attempt to assess the viability of several scenarios based on the biomethanation technology that include both in- and ex-situ biomethanation as well as utilisation of on-site renewable electricity and grid electricity in a transient mode.

Five scenarios were designed and evaluated and the calculated LCOE lies between 127.8 and 159.8 £/MWh. The consideration of existing policy mechanisms and revenues from by-products reduces the LCOEs to 31.4–68.1 £/MWh. The execution of a sensitivity analysis exposed that the electricity price and the electrolyser cost are the main cost contributors in all the scenarios. Future techno-economic advances along with imposing appropriate policy incentives can create the proper framework for two scenarios to generate profits. The study concludes that current and future power to gas application should focus on utilising on-site generated electricity.

Citation

Michailos, S., Walker, M., Moody, A., Poggio, D., & Pourkashanian, M. (2021). A techno-economic assessment of implementing power-to-gas systems based on biomethanation in an operating waste water treatment plant. Journal of Environmental Chemical Engineering, 9(1), https://doi.org/10.1016/j.jece.2020.104735

Journal Article Type Article
Acceptance Date Nov 5, 2020
Online Publication Date Nov 7, 2020
Publication Date 2021-02
Deposit Date Mar 19, 2021
Publicly Available Date Nov 8, 2021
Journal Journal of Environmental Chemical Engineering
Print ISSN 2213-3437
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 9
Issue 1
Article Number 104735
DOI https://doi.org/10.1016/j.jece.2020.104735
Keywords Biomethanation; Power to gas; Biogas upgrading; CO2 utilisation; Techno-Economics; Carbon footprint assessment
Public URL https://hull-repository.worktribe.com/output/3742457
Additional Information This article is maintained by: Elsevier; Article Title: A techno-economic assessment of implementing power-to-gas systems based on biomethanation in an operating waste water treatment plant; Journal Title: Journal of Environmental Chemical Engineering; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.jece.2020.104735; Content Type: article; Copyright: © 2020 Elsevier Ltd. All rights reserved.