Abstract
A computational model was developed and applied to investigate struvite crystallization with design parameters of temperature 30, 35 and 40° C and pH solution. This study used visual MINTEQ to optimized the operating parameters for controlling crystallization of struvite by the addition of maleic acid in liquid waste. The results showed both struvite and struvite-K minerals were the main minerals that control recovery of Mg+2, NH4+, and PO4 −3 ions. Ammonium (NH4+) removal was obtained of 55.938% at a temperature of 30° C and pH 9 so that it could be used as fertilizer and reduce the environmental impact. The identification of struvite crystals by the Rietveld XRPD method and irregular prismatic crystal morphology were shown in crystal struvite using SEM-EDX analysis.
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