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Increasing biogas production by thermal (70°C) sludge pre-treatment prior to thermophilic anaerobic digestion

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Ferrer, Ivet, Ponsá, Sergio, Vázquez, Felícitas, Font, Xavier·2008·Biochemical Engineering Journal

Abstract

The objective of this work was to investigate the effect of a low temperature pre-treatment (70 ◦ C) on the efficiency of thermophilic anaerobic digestion of primary and secondary waste sludge. Firstly, effect of sludge pre-treatment time (9, 24, 48 and 72 h) was evaluated by the increase in volatile dissolved solids (VDSs), volatile fatty acids (VFAs) and biogas production in thermophilic batch tests. Secondly, semi-continuous process performance was studied in a lab-scale reactor (5 L) working at 55 ◦C and 10 days solid retention time. The 70 ◦ C pre-treatment showed an initial solubilization effect (increasing VDS by almost 10 times after 9 h), followed by a progressive generation of VFA (from 0 to nearly 5 g L−1 after 72 h). Biogas production increased up to 30% both in batch tests and in semi-continuous experiments. Our results suggest that a short period (9 h) low temperature pre-treatment should be enough to enhance methane production through thermophilic anaerobic digestion of sludge.

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Metadata

Authors
Ferrer, I., Ponsá, S., Vázquez, F., & Font, X.
Venue
Biochemical Engineering Journal
Publisher
Elsevier BV
Published
2008-11
Volume
42
Issue
2
Pages
186-192
ISSN
1369-703X (ISSN-L)
OpenAlex
W2123953876
Cited by
285
References
23
FWCI
35.15
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Increasing biogas production by thermal (70°C) sludge pre-treatment prior to thermophilic anaerobic digestion. https://app.cochat.ai/papers/10.1016/j.bej.2008.06.020
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Ferrer, I., Ponsá, S., Vázquez, F., & Font, X. (2008). Increasing biogas production by thermal (70°C) sludge pre-treatment prior to thermophilic anaerobic digestion. Biochemical Engineering Journal. https://doi.org/10.1016/j.bej.2008.06.020

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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