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Dynamic biogas production from anaerobic digestion of sewage sludge for on-demand electricity generation

Lafratta, Mauro, Thorpe, Rex B., Ouki, Sabeha K., Shana, Achame, Germain, Eve, Willcocks, Mark and Lee, Jacquetta (2020) Dynamic biogas production from anaerobic digestion of sewage sludge for on-demand electricity generation Bioresource Technology, 310, 123415.

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Abstract

The aim of this work was to study the potentials and benefits of dynamic biogas production from Anaerobic Digestion (AD) of sewage sludge. The biogas production rate was aimed to match the flexible demand for electricity generation and so appropriate feeding regimes were calculated and tested in both pilot and demonstration scale.

The results demonstrate that flexibilization capability exists for both conventional AD and advanced AD using Thermal Hydrolysis Process (THP) as pre-treatment. Whilst the former provides lower capability, flexible biogas production was achieved by the latter, as it provides a quick response. In all scenarios, the value of the biogas converted into electricity is higher than with a steady operational regime, increasing by 3.6% on average (up to 5.0%) in conventional and by 4.8% on average (up to 7.1%) with THP. The process has proven scalable up to 18m3 digester capacity in operational conditions like those in full scale.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Centre for Environment and Sustainability
Authors :
NameEmailORCID
Lafratta, Maurom.lafratta@surrey.ac.uk
Thorpe, Rex B.Rex.Thorpe@surrey.ac.uk
Ouki, Sabeha K.s.k.ouki@surrey.ac.uk
Shana, Achame
Germain, Eve
Willcocks, Mark
Lee, JacquettaJ.Lee@surrey.ac.uk
Date : August 2020
Funders : Engineering and Physical Sciences Research Council (EPSRC)
DOI : 10.1016/j.biortech.2020.123415
Copyright Disclaimer : © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords : Anaerobic digestion; Flexibility; Demand-driven biogas production; Sewage sludge; Thermal hydrolysis process
Depositing User : Clive Harris
Date Deposited : 01 Jun 2020 16:52
Last Modified : 02 Sep 2020 17:07
URI: http://epubs.surrey.ac.uk/id/eprint/857032

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