Analysis of uncontrolled phosphorus precipitation in anaerobic digesters under thermophilic and mesophilic conditions
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Analysis of uncontrolled phosphorus precipitation in anaerobic digesters under thermophilic and mesophilic conditions

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Analysis of uncontrolled phosphorus precipitation in anaerobic digesters under thermophilic and mesophilic conditions

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dc.contributor.author Sánchez Ramírez, Javier Eduardo
dc.contributor.author Pastor, Laura
dc.contributor.author Martí Ortega, Nuria
dc.contributor.author Claros, J.
dc.contributor.author Doñate, S.
dc.contributor.author Bouzas Blanco, Alberto
dc.date.accessioned 2019-11-13T08:53:24Z
dc.date.available 2020-10-29T05:45:05Z
dc.date.issued 2019
dc.identifier.uri https://hdl.handle.net/10550/72181
dc.description.abstract This study compares the operation of mesophilic and thermophilic anaerobic digestion of sewage sludge and their effects in uncontrolled phosphorus precipitation. The research has been carried out using a pilot plant consisting of two digesters of 1.6 m3 working volume, treating the mixed sludge of Alzira WWTP (Valencia, Spain). The digesters were operated in parallel, at different conditions: mesophilic (38 ± 2.0°C) and thermophilic (55 ± 2.5°C) temperatures and organic loading rates (OLR) ranging from 1.1 to 1.7 kg volatile solids (VS) m−3 d−1 and different hydraulic retention times (HRT) 20, 15 and 12 days. Uncontrolled precipitation was evaluated through P, Mg and Ca mass balances in both digesters. The results revealed that up to 82% of the available P and 81% of the available Mg precipitated in the mesophilic digester at HRT = 20 days which suggests the possible formation of struvite in both digesters. At lower HRT (HRT = 12 days) Mg and Ca precipitation was negligible and P fixation has been attributed to the possible formation of iron phosphates or adsorption processes on solid surfaces.
dc.language.iso eng
dc.relation.ispartof Environmental Technology, 2019
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Sánchez Ramírez, Javier Eduardo Pastor, Laura Martí Ortega, Nuria Claros, J. Doñate, S. Bouzas Blanco, Alberto 2019 Analysis of uncontrolled phosphorus precipitation in anaerobic digesters under thermophilic and mesophilic conditions Environmental Technology
dc.subject Aigües residuals Plantes de tractament
dc.subject Aigua Qualitat
dc.title Analysis of uncontrolled phosphorus precipitation in anaerobic digesters under thermophilic and mesophilic conditions
dc.type info:eu-repo/semantics/article
dc.date.updated 2019-11-13T08:53:24Z
dc.identifier.doi https://doi.org/10.1080/09593330.2019.1681522
dc.identifier.idgrec 135026
dc.accrualMethod
dc.embargo.terms 1 year

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