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Desalination and Water Treatment Volume 51, 2013 - Issue 13-15
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Articles

Organic pollutants removal and recovery from animal wastewater by mesoporous struvite precipitation

Edson Luiz Foletto Department of Chemical Engineering, Federal University of Santa Maria, 97105-900, Santa Maria, RS, Brazil Phone: Tel. +55 55 32209592 Fax: Tel. +55 55 32209592Correspondence[email protected]
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Wilson Roberto Barreto dos Santos Department of Chemical Engineering, Federal University of Santa Maria, 97105-900, Santa Maria, RS, Brazil Phone: Tel. +55 55 32209592 Fax: Tel. +55 55 32209592
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Sérgio Luiz Jahn Department of Chemical Engineering, Federal University of Santa Maria, 97105-900, Santa Maria, RS, Brazil Phone: Tel. +55 55 32209592 Fax: Tel. +55 55 32209592
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Mariana Moro Bassaco Department of Chemical Engineering, Federal University of Santa Maria, 97105-900, Santa Maria, RS, Brazil Phone: Tel. +55 55 32209592 Fax: Tel. +55 55 32209592
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Marcio Antonio Mazutti Department of Chemical Engineering, Federal University of Santa Maria, 97105-900, Santa Maria, RS, Brazil Phone: Tel. +55 55 32209592 Fax: Tel. +55 55 32209592
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Adriano Cancelier Department of Chemical Engineering, Federal University of Santa Maria, 97105-900, Santa Maria, RS, Brazil Phone: Tel. +55 55 32209592 Fax: Tel. +55 55 32209592
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André Gündel University Campus, Federal University of Pampa, 96413-170, Bagé, RS, Brazil
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Pages 2776-2780 | Received 10 Apr 2012, Accepted 23 Aug 2012, Published online: 02 Apr 2013
 
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Abstract

Swine wastewater containing high concentration of phosphorus (P) and nitrogen (N) was treated by struvite precipitation method. The pH showed to have strong influence on N and P removal, whereas the excess of ammonia in the reaction medium did not show influence. The precipitated crystals were identified and analyzed by X-ray diffraction (XRD), thermogravimetric analysis (TGA), atomic force microscopy (AFM), and surface area (BET) revealing that there was the formation of a pure and crystalline phase mesostructured at pH 9.5 with an average crystal size in nanometric scale.

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