A water treatment method is provided to generate potable water and a fertilization or fertigation product. This includes steps of a] regenerating a strong base anion resin (10, 10', 10'') using an amount of potassium chloride solution of between 0.25 and 1.0 mols/L of resin at a concentration of less than or equal to 1.0M and 5 at a flow rate of less than or equal to 1 bed volumes/hour; b] rinsing the strong base anion resin (10, 10', 10''); c] passing a raw water stream to be treated through the regenerated strong base anion resin (10, 10', 10''); d] collecting between 100 bed volumes and 150 bed volumes of an output stream from the strong base anion resin as a high-nitrate-concentration fertilization or fertigation 10 output; and e] subsequently collecting between 300 bed volumes and 500 bed volumes of the output stream from the strong base anion resin (10, 10', 10'') as low-nitrate-concentration potable water.
A water treatment method to generate potable water and a fertilization or fertigation product is provided. The method comprises the steps of: passing a raw water stream through an anion exchange resin (14a, 14b) to generate a potable water output; regenerating the anion exchange resin (14a, 14b) using a weak potassium chloride solution to generate a product output comprising potassium sulphate, potassium bicarbonate, and preferably also potassium nitrate, suitable for use as or as a precursor to a liquid fertilization or fertigation product.
B01J 39/08 - Use of material as cation exchangersTreatment of material for improving the cation exchange properties
B01J 47/028 - Column or bed processes using columns or beds of different ion exchange materials in series with alternately arranged cationic and anionic exchangers
B01J 49/57 - Regeneration or reactivation of ion-exchangersApparatus therefor characterised by the regeneration reagents for anionic exchangers
B01J 49/53 - Regeneration or reactivation of ion-exchangersApparatus therefor characterised by the regeneration reagents for cationic exchangers
B01J 49/60 - Cleaning or rinsing ion-exchange beds
B01J 49/08 - Regeneration or reactivation of ion-exchangersApparatus therefor of fixed beds containing cationic and anionic exchangers in separate beds
C05D 1/02 - Manufacture from potassium chloride or sulfate or double or mixed salts thereof
C05C 5/02 - Fertilisers containing other nitrates containing sodium or potassium nitrate
C05G 1/00 - Mixtures of fertilisers covered individually by different subclasses of class
A water treatment method to generate potable water and a fertilization or fertigation product is provided. The method comprises the steps of: passing a raw water stream through an anion exchange resin (14a, 14b) to generate a potable water output;regenerating the anion exchange resin (14a, 14b)using a weak potassium chloride solution to generate a product output comprising potassium sulphate,potassium bicarbonate, and preferably also potassium nitrate,suitable for use as or as a precursor to a liquid fertilization or fertigation product.
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