Veolia Water Technologies (www.veoliawatertech.com) will provide a processing plant integrating HPD crystallization systems designed to produce phosphorus fertilizer. To produce pure crystalline fertilizers, the ALKIMIA Group, a Tunisian chemical holding company specialized in the production of phosphate salts for industrial applications, contracted Veolia to deliver HPD crystallization technologies at a new 25,000-ton/yr mono-ammonium phosphate (MAP) plant located in Gabes, Tunisia.
Integrated to the plant, which will produce higher-value fertilizer for regional export, Veolia designed a circuit to process mono and diammonium phosphate solution through a double crystallization sequence using HPD PIC technology that allows for minimizing the waste purge and achieving higher production yields. The production line includes solid-liquid centrifugal separation, drying, cooling, and screening systems to deliver a product with a large crystal size that has maximum purity (higher than 99% wt) and solubility (impurities concentration below 0.2% wt).
Because crystalline fertilizer production operations are complex, delicate and sensitive, Veolia proposed a solution that followed a series of laboratory tests to simulate the crystallization process and confirm its technical feasibility at a bench-scale. This crucial step reduced the risks and gave the ALKIMIA Group the confidence that the proposed technical and commercial process is both straightforward and scalable.
“We are pleased to help ALKIMIA diversify its product portfolio into higher-value products. This project at Gabes reflects the confidence of leading MAP producers in Veolia’s crystallization knowhow to deliver fully-soluble phosphorus fertilizers to a market hungry for sustaining crop yields amid increased water scarcity” stated Jim Brown, CEO of Veolia Water Technologies Americas.