Aragon-Briceño, CI, Ross, AB and Camargo-Valero, MA orcid.org/0000-0003-2962-1698 (2023) Strategies for the Revalorization of Sewage Sludge in a Waste Water Treatment Plant Through the Integration of Hydrothermal Processing. Waste and Biomass Valorization, 14 (1). pp. 105-126. ISSN 1877-2641
Abstract
Different strategies for sewage sludge management have been implemented to minimize the environmental impacts and benefit from the resources embedded in this waste stream. In that regard, Hydrothermal treatments (HTTs) of biomass can contribute generating high-value products (hydrochar) and enhancing biogas generation. In this work, different strategies were analysed for implementing HTTs at WWTPs considering the effect of 2 different process temperatures (160 and 250 °C) on different sewage sludge samples (primary, secondary and digestate sludge). Determination of carbon, nitrogen and phosphorus fate and mass and energy balances in hydrochar and process waters were carried out. HTT promoted solubilization of nitrogen, phosphorus and organic carbon up to 89%, 13% and 124% respectively. Moreover, biomethane yield increased up to 168% reaching methane concentrations up to 79% in the biogas. High heating values of hydrochars ranged from 12.0 to 18.2 MJ kg¯¹. The integration of HTT as an intermediate step between two-step anaerobic digestion process showed an increase in the net energy balance of up to 124% in comparison with the conventional anaerobic digestion process.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022, The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
Keywords: | Biomethane production; Clean energy; Hydrothermal process; Process waters ; Sewage sludge |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Funding Information: | Funder Grant number BBSRC (Biotechnology & Biological Sciences Research Council) BB/S011439/1 UK India Education & Research Initiative 2018-DST-10361 |
Depositing User: | Symplectic Publications |
Date Deposited: | 13 Jul 2022 13:10 |
Last Modified: | 25 Jun 2023 23:02 |
Status: | Published |
Publisher: | Springer |
Identification Number: | 10.1007/s12649-022-01856-0 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:188725 |