Fermentation and elutriation of primary sludge: Effect of SRT on process performance
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Fermentation and elutriation of primary sludge: Effect of SRT on process performance

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Fermentation and elutriation of primary sludge: Effect of SRT on process performance

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dc.contributor.author Bouzas Blanco, Alberto
dc.contributor.author Ribes Bertomeu, Josep
dc.contributor.author Ferrer Polo, José
dc.contributor.author Seco Torrecillas, Aurora
dc.date.accessioned 2019-11-06T14:43:26Z
dc.date.available 2019-11-06T14:43:26Z
dc.date.issued 2007
dc.identifier.uri https://hdl.handle.net/10550/72102
dc.description.abstract A primary sludge fermentation-elutriation pilot plant was operated using in-line and side-stream schemes. The influence of solids retention time, recirculation sludge flow-rate and solids concentration on the fermentation-elutriation process performance has been assessed in this paper. The use of high elutriation flows (12% of influent flow) improved the volatile fatty acids (VFA) concentration in the effluent stream. Suspended solids removal efficiency decreased in the primary settler when the solids retention time (SRT) was increased from 4 to 8 days. Disintegration step during hydrolysis process was pointed out as the main reason for that decrease. Maximum VFA productions were achieved at SRT between 6 and 8 days at the highest elutriation flow tested for both configurations. Propionic, butyric and valeric volatile fatty acids percentage increased when total solids sludge concentrations above 23,000 mg l−1 were used. Hydrogen accumulation, causing acetogenic bacteria inhibition, was indicated as the reason for C3-C5 fatty acids accumulation.
dc.language.iso eng
dc.relation.ispartof Water Research, 2007, vol. 41, num. 4, p. 747-756
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Bouzas Blanco, Alberto Ribes Bertomeu, Josep Ferrer Polo, José Seco Torrecillas, Aurora 2007 Fermentation and elutriation of primary sludge: Effect of SRT on process performance Water Research 41 4 747 756
dc.subject Aigües residuals Plantes de tractament
dc.title Fermentation and elutriation of primary sludge: Effect of SRT on process performance
dc.type info:eu-repo/semantics/article
dc.date.updated 2019-11-06T14:43:26Z
dc.identifier.doi https://doi.org/10.1016/j.watres.2006.11.034
dc.identifier.idgrec 034276

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