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Biogas recovery for sustainable cities: A critical review of enhancement techniques and key local conditions for implementation
Lund University, Lund, Sweden; University of São Paulo, São Paulo, Brazil.ORCID iD: 0000-0001-9466-2846
Lund University, Lund, Sweden; University of Johannesburg, Johannesburg, South Africa; South Ural State University (National Research University), Chelyabinsk, Russian Federation; Institute of Environmental Engineering, Wroclaw University of Environmental and Life Sciences, Wrocław, Poland.ORCID iD: 0000-0001-8919-3838
University of São Paulo, São Paulo, Brazil.
2021 (English)In: Sustainable cities and society, ISSN 2210-6707, Vol. 72, article id 103033Article, review/survey (Refereed) Published
Abstract [en]

There is great potential to apply energy recovery from municipal wastewater treatment plants (WWTP) to achieve better energy efficiency and greenhouse gas emissions abatement. However, in most of the wastewater treatment plants that produce biogas through sludge digestion, there is no thermal energy recovery or electricity generation, and the biogas is flared and wasted, particularly in developing countries. This paper discusses the recent technological advances related to biogas recovery from wastewater treatment besides identifying research gaps and local conditions, which affect implementation. Techniques for enhancement of biogas production such as co-digestion and microalgae systems for energy recovery were reviewed in terms of performance and context for application. This paper provides an assessment of how local conditions promote or hinder biogas recovery from WWTP in megacities of developing countries. The lack of government subsidies and a biogas market that is not well developed and regulated hinder biogas recovery implementation in the studied megacities. Infrastructure and electricity prices are also discussed. Strategies to promote energy recovery are recommended based on successful examples of energy self-sufficient WWTP. The findings may not only support planning on energy recovery but also guide technological development and research on this topic, aligned with the sustainable development goals.

Place, publisher, year, edition, pages
Amsterdam: Elsevier, 2021. Vol. 72, article id 103033
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:hh:diva-46928DOI: 10.1016/j.scs.2021.103033ISI: 000672608100004Scopus ID: 2-s2.0-85109102304OAI: oai:DiVA.org:hh-46928DiVA, id: diva2:1664793
Note

Funding: This study was financed by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brazilian Federal Agency for Support and Evaluation of Graduate Education) - Brazil (CAPES) - Finance Code 001, through a scholarship granted to the first author. The authors thank Han Yu and Fernanda Souza for assisting in the initial data collection. Open access funding provided by Lund University.

Available from: 2022-06-05 Created: 2022-06-05 Last updated: 2022-06-13Bibliographically approved

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