Treatment of high-strength wastewater from ammonium and phosphate ions with the obtaining of struvite

Abstract

Abstract.1 This work reviews the main methods of nitrogen and phosphorus removal from wastewater. The method of simultaneous removal of highly concentrated nitrogen and phosphorus was analyzed by physical and chemical precipitation, forming struvite, a by-product of magnesium ammonium orthophosphate hexahydrate. Laboratory investigations were conducted on the test solutions with the concentrations of ammonium nitrogen, phosphates, ions of magnesium and calcium corresponding to the ones of relevant elements in wastewater of swine complexes located in Lviv region, Ukraine. The analyses were done at various molar ratios of magnesium and phosphate ions and at various pH values. The comparative thermal analysis of chemical precipitation products and pure struvite was performed. The optimal conditions were identified to experience the maximum efficiency of simultaneous removal of ammonium nitrogen and phosphate ions from wastewater, forming MgNH 4 PO 4 ·6H 2 O. Recommendations on the use of the obtained product as a fertilizer were elaborated.

Environmental Impact of Devastated Landscapes of Volhynian Upland and Male Polisya (Ukraine)

“…Long-term discharges of crude water are accompanied by a decrease in self-purification capacity of the rivers, accumulation of dangerous compounds in the mud, and the formation of hazardous chemicals (Yadav & Jamal, 2018;Tulaydan et al, 2017).…”

The Synthesis of Proloned Grains by the Adsorption of the Elements of Power by Zeolith from Common Steady Water

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Migration of Hazardous Components of Municipal Landfill Leachates into the Environment

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