Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/41596

TitleA design of experiments to assess phosphorous removal and crystal properties in struvite precipitation of source separated urine using different Mg sources
Author(s)Barbosa, S. G.
Peixoto, L.
Meulman, Brendo
Alves, M. M.
Pereira, M. A.
KeywordsHuman Urine
Phosphorus recovery
Magnesium sources
Stirring speed
Struvite crystal size
Issue date15-Aug-2016
PublisherElsevier B.V.
JournalChemical Engineering Journal
CitationBarbosa, S. G.; Peixoto, L.; Meulman, Brendo; Alves, M. Madalena; Pereira, M. A., A design of experiments to assess phosphorous removal and crystal properties in struvite precipitation of source separated urine using different Mg sources. Chemical Engineering Journal, 298, 146-153, 2016
Abstract(s)Phosphorus recycling and recovery has received special attention due to its non-replaceable and non-renewability. Phosphorus recovery from human urine in the form of struvite crystals is a potential alternative source. In this work, the efficiency of struvite precipitation from source separated human urine and struvite crystals size were analyzed using three different Mg2+ sources (MgCl2, Mg(OH)2 and MgO), individually evaluated using a statistical design of experiments to assess the combined effect of Mg2+:P molar ratio (1:1, 1.5:1 and 2:1) and stirring speed (30, 45 and 60 rpm). Formation of struvite crystals was confirmed by X-ray Diffraction (XRD) and scanning electron microscopy (SEM) with an energy dispersive spectrometer (EDS). Using the optimal conditions determined, MgO as Mg2+ source at 2:1 molar ratio and a stirring speed of 30 rpm, 99% of P was recovered as struvite crystals with a size of 50 to 100 m.
TypeArticle
DescriptionSupplementary data associated with this article can be found, in the online version, at: http://dx.doi.org/10.1016/j.cej.2016.03.148.
URIhttp://hdl.handle.net/1822/41596
DOI10.1016/j.cej.2016.03.148
ISSN1385-8947
e-ISSN1385-8947
Publisher versionhttp://www.elsevier.com/locate/issn/13858947
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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