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Thermodynamic and solution chemistry of struvite

Ali, MD.I., Schneider, P.A. and Hudson, N. (2005) Thermodynamic and solution chemistry of struvite. Journal of the Indian Institute of Science, 85 (3). pp. 141-149.

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The key feature of this paper is the combined removal of magnesium, ammonium and phosphate from a representative synthetic solution of piggery effluent. The byproduct of this recovery process is struvite, commercially used as slow-release fertiliser. A thermodynamic model was developed relating to all the complexes of magnesium, ammonium and phosphate using gPROMS process software. A laboratory-based batch experiment confirmed 80% recovery of phosphate using this crystallization technique. The batch experiment was conducted at constant pH using synthetic solution made up of analytical-grade MgCl2 and NH4H2PO4. Borosilicate glass grindings of 5 g were used as seeds in this batch experiment. Basic solution characteristics of piggery effluent are reported in this paper.

Item Type: Journal Article
Publisher: Indian Institute of Science
Copyright: © Indian Institute of Science.
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