Method for removing a contaminant from wastewater from an industrial plant and a system for performing such method
AssigneeYara International Asa
InventorsPetr CHLADEK, Clive M. H. BRERETON, Eric Robin MIELKE
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Abstract
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.
Claims19
A method for removing a contaminant from wastewater from a fertilizer plant comprising the steps of:
- a) concentrating the contaminant in the wastewater;
- b) chemically converting the contaminant in the wastewater by electrolysis;
- and
- c) recirculating the electrolyzed wastewater to the industrial plant wherein the step of concentrating the wastewater is performed by a forward osmosis module or a pressure assisted osmosis module, comprising a first compartment and a second compartment separated by a membrane,
- wherein the step of concentrating the wastewater comprises the step of directing the wastewater to the first compartment of the osmosis module and wherein the recirculating step comprises the steps of
- i) directing the electrolyzed wastewater to the second compartment of the osmosis module;
- and
- ii) recirculating the wastewater from the second compartment of the osmosis module to the fertilizer plant.
(canceled)
(canceled)
A system for removing a contaminant from wastewater from an industrial plant comprising:
- a) a concentrating unit adapted to be fluidly connected to the wastewater from the industrial plant
- b) an electrochemical treatment unit for removing the contaminant fluidly connected downstream of the concentration unit and adapted to be fluidly connected to recirculate the treated wastewater to the industrial plant, wherein the concentrating unit is a forward or pressure assisted osmosis module, the osmosis module comprising a first compartment and a second compartment separated by a membrane, wherein
- i) the wastewater from the industrial plant to be treated is fluidly connected to the first compartment;
- ii) the first compartment is fluidly connected to an inlet of the electrochemical treatment unit;
- iii) an outlet of the electrochemical treatment unit is fluidly connected to the second compartment and the second compartment is adapted to be fluidly connected to the industrial plant;
- and optionally
- iv) a feed of a salt solution fluidly connected to the second compartment;
- and wherein the electrochemical treatment unit comprises an electrolysis unit.
(canceled)
Dependencies are inferred from the claim text.