Yara International Asa

Petr Chladek

Francois Ledoux

Torstein Obrestad

Amund Myrstad

Clive M H Brereton

Odd-Arne Lorentsen

Robertus Louwe

Eric Robin Mielke

Ole Edvard Kongstein

Asbjørn Solheim

Marie Lacombe

The present disclosure concerns fertilizer particles comprising calcium nitrate and potassium nitrate. It is found that fertilizer particles comprising 43 to 47% w/w calcium nitrate and 46 to 54% w/w potassium nitrate can be produced by melt granulation. Due to undercooling problems, such particles were not expected to be suitable for industrial production by melt granulation. However, the present disclosure provides a composition which forms a low viscosity melt with short solidification time. This was successfully achieved by reducing the water content of a fertilizer melt comprising 43 to 47% w/w calcium nitrate and 46 to 54% w/w potassium nitrate to less than 3% w/w of the melt.

Calcium nitrate and potassium nitrate fertiliser particles

The present application relates to a method for removing a contaminant from wastewater from industrial fertilizer plant. The method comprises the steps of concentrating the wastewater, of electrolyzing the wastewater and of recirculating the electrolyzed wastewater to the fertilizer plant. The present application further relates to a system arranged to perform the method according to the present application.

Method for removing a contaminant from wastewater from an industrial plant and a system for performing such method

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Porsgrunn, Norway

Petr Chladek