Nutrients Recovery by Struvite Formation from Wastewater in a Fluidized Bed Reactor

Abstract:

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Nutrient removal and recovery from wastewater is being challenged to avoid eutrophication problems, and the discharge standards have also been tightened by water regulations. Therefore, this study was undertaken to recover the nutrients from both synthetic wastewater and swine wastewater in a fluidized bed reactor (FBR). The operational parameters were changed to find out the optimum conditions for struvite formation. The most suitable pH was identified around pH 9. When the molar ratio of magnesium as Mg: P was 2:1 in the FBR, the removal efficiency of NH4-N and PO4-P was 79 and 90 %, respectively. The seed material was effective to form struvite in the condition of 30 g dosage. Struvite crystallization in reaction was completed in 20 minutes. The growth of struvite crystals was confirmed by the analysis of XRD, FT-IR and TG-DTA. In addition, the struvite was successfully recovered when the optimum conditions were applied to the swine wastewater.

Info:

Periodical:

Materials Science Forum (Volumes 486-487)

Edited by:

Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee

Pages:

387-390

DOI:

10.4028/www.scientific.net/MSF.486-487.387

Citation:

C. W. Lee et al., "Nutrients Recovery by Struvite Formation from Wastewater in a Fluidized Bed Reactor", Materials Science Forum, Vols. 486-487, pp. 387-390, 2005

Online since:

June 2005

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Price:

$35.00

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