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Optimisation of sludge line management to enhance phosphorus recovery in WWTP

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Optimisation of sludge line management to enhance phosphorus recovery in WWTP

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dc.contributor.author	Martí Ortega, Nuria
dc.contributor.author	Ferrer Polo, José
dc.contributor.author	Seco Torrecillas, Aurora
dc.contributor.author	Bouzas Blanco, Alberto
dc.date.accessioned	2019-11-05T14:31:40Z
dc.date.available	2019-11-05T14:31:40Z
dc.date.issued	2008
dc.identifier.citation	Martí Ortega, Nuria Ferrer Polo, José Seco Torrecillas, Aurora Bouzas Blanco, Alberto 2008 Optimisation of sludge line management to enhance phosphorus recovery in WWTP Water Research 42 18 4609 4618
dc.identifier.uri	https://hdl.handle.net/10550/72026
dc.description.abstract	The management of the sludge treatment line can be optimized to reduce uncontrolled phosphorus precipitation in the anaerobic digester and to enhance phosphorus recovery in WWTP. In this paper, four operational strategies, which are based on the handling of the prefermented primary sludge and the secondary sludge from an EBPR process, have been tested in a pilot plant. The separated or mixed sludge thickening, the use of a stirred contact tank and the elutriation of the thickened sludge are the main strategies studied. Both the reduction of phosphorus precipitation in the digester and the supernatant suitability for a struvite crystallization process were assessed in each configuration. The mixed sludge thickening combined with a high flowrate elutriation stream reduced the phosphorus precipitation in the digester by 46%, with respect to the separate sludge thickening configuration (common practice in WWTP). Moreover, in this configuration, 68% of the soluble phosphorus in the system is available for a possible phosphorus recovery process by crystallization (not studied in this work). However, a high Ca/P molar ratio was detected in the resultant supernatant which is pointed out as a problem for the efficiency of struvite crystallization.
dc.language.iso	eng
dc.relation.ispartof	Water Research, 2008, vol. 42, num. 18, p. 4609-4618
dc.subject	Aigües residuals
dc.subject	Aigües residuals Plantes de tractament
dc.title	Optimisation of sludge line management to enhance phosphorus recovery in WWTP
dc.type	journal article	es_ES
dc.date.updated	2019-11-05T14:31:41Z
dc.identifier.doi	10.1016/j.watres.2008.08.012
dc.identifier.idgrec	046057
dc.rights.accessRights	open access	es_ES