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Phosphorus recovery by struvite crystallization in WWTPs: Influence of the sludge treatment line operation

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Phosphorus recovery by struvite crystallization in WWTPs: Influence of the sludge treatment line operation

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dc.contributor.author	Martí Ortega, Nuria
dc.contributor.author	Pastor, Laura
dc.contributor.author	Bouzas Blanco, Alberto
dc.contributor.author	Ferrer Polo, José
dc.contributor.author	Seco Torrecillas, Aurora
dc.date.accessioned	2019-11-06T13:59:58Z
dc.date.available	2019-11-06T13:59:58Z
dc.date.issued	2010
dc.identifier.citation	Martí Ortega, Nuria Pastor, Laura Bouzas Blanco, Alberto Ferrer Polo, José Seco Torrecillas, Aurora 2010 Phosphorus recovery by struvite crystallization in WWTPs: Influence of the sludge treatment line operation Water Research 44 7 2371 2379
dc.identifier.uri	https://hdl.handle.net/10550/72101
dc.description.abstract	Phosphorus recovery by struvite (MgNH4PO4·6H2O) crystallization is one of the most widely recommended technologies for treating sludge digester liquors especially in wastewater treatments plants (WWTP) with enhanced biological phosphorus removal (EBPR). In this paper, phosphorus recovery by struvite crystallization is assessed using the rejected liquors resulting from four different operational strategies of the sludge treatment line. Phosphorus precipitation and recovery efficiencies of between 80-90% and 70-85%, respectively, were achieved in the four experiments. The precipitates formed were mainly struvite, followed by amorphous calcium phosphate and, in some experiments, by calcite. The highest global phosphorus recovery taking into account both the sludge line and the crystallizer was achieved when mixed thickening and high elutriation were carried out (8.4 gP/kg treated sludge). However, low struvite content was obtained in the crystallizer with this operation scheme due to the high calcium content in the elutriation stream. Therefore, if the final purpose is to obtain struvite, the reduction of the elutriation flowrate is widely recommended in the case of high water hardness.
dc.language.iso	eng
dc.relation.ispartof	Water Research, 2010, vol. 44, num. 7, p. 2371-2379
dc.subject	Aigües residuals Plantes de tractament
dc.title	Phosphorus recovery by struvite crystallization in WWTPs: Influence of the sludge treatment line operation
dc.type	journal article	es_ES
dc.date.updated	2019-11-06T14:00:02Z
dc.identifier.doi	10.1016/j.watres.2009.12.043
dc.identifier.idgrec	055360
dc.rights.accessRights	open access	es_ES