Quintana-Najera, J, John Blacker, A, Fletcher, LA et al. (1 more author) (2021) Influence of augmentation of biochar during anaerobic co-digestion of Chlorella vulgaris and cellulose. Bioresource Technology, 343. 126086. ISSN 0960-8524
Abstract
The anaerobic co-digestion (AcoD) of microalgae is a prospective option for generating biomethane from renewable sources. This study investigates the effects of inoculum-to-substrate ratio (ISR), C/N ratio and biochar (BC) load on the AcoD of Chlorella vulgaris and cellulose. An initial augmentation of BC at ISR 0.5–0.9 and C/N ratio 10–30 offered a pH buffering effect and resulted in biomethane yields of 233–241 mL CH4/g VS, corresponding to 1.8–4.6 times the controls. BC addition ameliorated significantly AcoD, supporting the digestate stability at less favourable conditions. The effect of the process variables was further studied with a 23 factorial design and response optimisation. Under the design conditions, the variables had less influence over methane production. Higher ISRs and C/N ratios favoured AcoD, whereas increasing amounts of BC reduced biomethane yield but enhanced production rate. The factorial design highlighted the importance of BC-load on AcoD, establishing an optimum of 0.58 % (w/v).
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) |
Keywords: | Anaerobic co-digestion; Biochar; Pyrolysis; Biomethane optimization; Microalgae |
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) |
Depositing User: | Symplectic Publications |
Date Deposited: | 19 Oct 2021 14:58 |
Last Modified: | 19 Oct 2021 14:58 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.biortech.2021.126086 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:179370 |