Pollution Research Paper

Vol 38, Issue 4, 2019; Page No.( 880-884 )

THE EFFECT OF AERATION ON STRUVITE PRECIPITATION

WARMADEWANTHI, WIDYA PRIHESTI ISWARINI, NURANI IKHLAS, ELLINA SITEPU PANDEBESIE, ARSETO YEKTI BAGASTYO AND WELLY HERUMURTI

Abstract

Fertilizer industry wastewater contains high concentrations of phosphate and ammonium, which contaminate water bodies if the wastewater is not treated properly. One of the technologies used to control phosphate and ammonium contamination is precipitation to form struvite minerals. The aim of this study was to determine the ability of precipitation and aeration techniques to control phosphate and ammonium contamination. A wastewater sample with a volume of 1 L was added to the reactor and then MgCl2 was added. Samples were aerated using an air pump aerator with aeration flow rates of 4, 16, and 32 L/mins. The results showed that the pH value was raised due to aeration, and struvite was formed. The removal percentages of phosphate and ammonium were 99.95 and 33.11%, respectively, with an optimum aeration flow rate of 16 L/min and a pH of 8.5 ± 0.2. The results of SEM analysis showed that the precipitate formed was struvite with a long rodlike shape. It was concluded that precipitation and aeration techniques were capable of controlling phosphate and ammonium contamination.

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