Successful and stable operation of anaerobic thermophilic co-digestion of sun-dried sugar beet pulp and cow manure under short hydraulic retention time

This work consists of a long-term (621 days) experimental study about biogas production from sun dried sugar beet pulp and cow manure. Thermophilic (55 °C) anaerobic co-digestion was performed in semi-continuous reactors, testing ten hydraulic retention times (30-3 days) (HRTs) and organic loading r...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2022-04, Vol.293, p.133484-133484, Article 133484
Main Authors: Gómez-Quiroga, Xiomara, Aboudi, Kaoutar, Álvarez-Gallego, Carlos José, Romero-García, Luis Isidoro
Format: Article
Language:English
Subjects:
Anaerobic co-digestion
Anaerobiosis
Animals
Beta vulgaris - metabolism
Biofuels
Bioreactors
Cattle
Cow manure
Digestion
Manure
Methane - metabolism
Semi-continuous reactors
Sugars
Sun dried sugar beet pulp
Thermophilic
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Summary:This work consists of a long-term (621 days) experimental study about biogas production from sun dried sugar beet pulp and cow manure. Thermophilic (55 °C) anaerobic co-digestion was performed in semi-continuous reactors, testing ten hydraulic retention times (30-3 days) (HRTs) and organic loading rates (2–24 gVS/Lreactor∙d) (OLRs). Results showed that the best global system performance (regarding stability, biogas production, and organic matter removal) was achieved at an HRT as short as 5 days (OLR of 12.47 gVS/Lreactor∙d) with a biogas yield of 315 mL/gVSadded. The gradual OLR increase allowed system control and time-appropriate intervention, avoiding irreversible process disturbances and maintaining admissible acidity/alkalinity ratios (
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2021.133484