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|Title:||A 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.|
Alves, M. M.
Pereira, M. A.
Struvite crystal size
|Journal:||Chemical Engineering Journal|
|Citation:||Barbosa, 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.|
|Description:||Supplementary data associated with this article can be found, in the online version, at: http://dx.doi.org/10.1016/j.cej.2016.03.148.|
|Appears in Collections:||CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series|