Predicting the potential of sludge dewatering liquors to recover nutrients as struvite biominerals

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dc.contributor.authorSimoes, Francisco
dc.contributor.authorColston, Robert
dc.contributor.authorRosa-Fernandes, Catarina
dc.contributor.authorVale, Peter
dc.contributor.authorStephenson, Tom
dc.contributor.authorSoares, Ana
dc.date.accessioned2020-08-11T10:33:06Z
dc.date.available2020-08-11T10:33:06Z
dc.date.issued2020-06-27
dc.description.abstractPhosphorus and nutrient recovery from wastewater as mineral salts can support local replenishment of fertilisers and reduce mining, contributing to the circular economy. Wastewater and related streams are rich in nutrients, however; there is need to develop bio-based processes to recover them. This study investigates the fractions of phosphorus (P) used by Brevibacterium antiquum to form struvite biominerals (bio-struvite) in wastewater sludge dewatering liquors. After 72h of incubation, 25.6 mg P/L were recovered as bio-struvite from 12.4 mg P/L organic plus condensed P and 13.2 mg P/L of ortho-phosphate. The potential of sludge dewatering liquors to recover nutrients as struvite was investigated by characterising ten types of sludge liquors (originating from primary, secondary sludge, feed to anaerobic digester and digestate, from 3 types of wastewater treatment plants) for their P fractions together with other parameters relevant for B. antiquum growth. Results indicated that liquors obtained from primary sludge, feed to anaerobic digesters and digestate were the most suitable to produce bio-struvite, as these were found to frequently have a high content of organic and condensed P, between to 276–732 mg P/L. Liquors, from all the investigated sites, presented a higher potential for bio-struvite production than with conventional struvite precipitation. This study demonstrated that B. antiquum could convert organic and condensed P into bio-struvite, and this opens up a completely new way to recover forms of phosphorus that are not typically available for nutrient recovery in a single processen_UK
dc.identifier.citationSimoes F, Colston R, Rosa-Fernandes C, et al., (2020) Predicting the potential of sludge dewatering liquors to recover nutrients as struvite biominerals. Environmental Science and Ecotechnology, Volume 3, July 2020, Article number 100052en_UK
dc.identifier.issn2666-4984
dc.identifier.urihttps://doi.org/10.1016/j.ese.2020.100052
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/15662
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectAcid-hydrolysable phosphorusen_UK
dc.subjectP-recoveryen_UK
dc.subjectCentrate Sidestreamen_UK
dc.subjectBiomineralizationen_UK
dc.titlePredicting the potential of sludge dewatering liquors to recover nutrients as struvite biomineralsen_UK
dc.typeArticleen_UK

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