Diagnosis of an anaerobic pond treating temperate domestic wastewater: An alternative sludge strategy for small works

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dc.contributor.authorCruddas, Peter
dc.contributor.authorWang, K.
dc.contributor.authorBest, D.
dc.contributor.authorJefferson, Bruce
dc.contributor.authorCartmell, Elise
dc.contributor.authorParker, Alison
dc.contributor.authorMcAdam, Ewan J.
dc.date.accessioned2016-06-14T09:38:21Z
dc.date.available2016-06-14T09:38:21Z
dc.date.issued2014-01-15
dc.description.abstractAn anaerobic pond (AP) for treatment of temperate domestic wastewater has been studied as a small works sludge management strategy to challenge existing practice which comprises solids separation followed by open sludge storage, for up to 90 days. During the study, effluent temperature ranged between 0.1 °C and 21.1 °C. Soluble COD production was noted in the AP at effluent temperatures typically greater than 10 °C and was coincident with an increase in effluent volatile fatty acids (VFA) concentration, which is indicative of anaerobic degradation. Analysis from ports sited along the AP's length, demonstrated VFA to be primarily formed nearest the inlet where most solids deposition initially incurred, and confirmed the anaerobic reduction of sludge within this chamber. Importantly, the sludge accumulation rate was 0.06 m3 capita−1 y−1 which is in the range of APs operated at higher temperatures and suggests a de-sludge interval of 2.3–3.8 years, up to 10 times longer than current practice for small works. Coincident with the solids deposition profile, biogas production was predominantly noted in the initial AP section, though biogas production increased further along the AP's length following start-up. A statistically significant increase in mean biogas production of greater than an order of magnitude was measured between winters (t(n=19) = 5.52, P < 0.001) demonstrating continued acclimation. The maximum methane yield recorded was 2630 mgCH4 PE−1 d−1, approximately fifty times greater than estimated from sludge storage (57 mgCH4 PE−1 d−1). Anaerobic ponds at small works can therefore enable sludge reduction and longer sludge holding times than present thus offsetting tanker demand whilst reducing fugitive methane emissions currently associated with sludge storage, and based on the enhanced yield noted, could provide a viable opportunity for local energy generation.en_UK
dc.identifier.citationP.H. Cruddas, K. Wang, D. Best, B. Jefferson, E. Cartmell, A. Parker, E.J. McAdam, Diagnosis of an anaerobic pond treating temperate domestic wastewater: An alternative sludge strategy for small works, Ecological Engineering, Volume 63, February 2014, Pages 64-71en_UK
dc.identifier.issn0925-8574
dc.identifier.urihttp://dx.doi.org/10.1016/j.ecoleng.2013.12.011
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/9969
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-Non-Commercial-No Derivatives 3.0 Unported (CC BY-NC-ND 3.0). You are free to: Share — copy and redistribute the material in any medium or format. The licensor cannot revoke these freedoms as long as you follow the license terms. Under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Information: Non-Commercial — You may not use the material for commercial purposes. No Derivatives — If you remix, transform, or build upon the material, you may not distribute the modified material. No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.en_UK
dc.rights“NOTICE: this is the author’s version of a work that was accepted for publication in Ecological Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Ecological Engineering, VOL 63, 204, DOI http://dx.doi.org/10.1016/j.ecoleng.2013.12.011 ”en_UK
dc.subjectPsychrophilicen_UK
dc.subjectPsychrotoleranten_UK
dc.subjectMethane productionen_UK
dc.subjectMunicipal wastewateren_UK
dc.titleDiagnosis of an anaerobic pond treating temperate domestic wastewater: An alternative sludge strategy for small worksen_UK
dc.typeArticleen_UK

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