Method for defouling electrodeionization apparatus
AssigneeMillipore Corporation
InventorsAnthony J. Giuffrida, Yair Egozy
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Abstract
A pretreatment step for the defouling of the compartments used in electrodeionization apparatus in which a solution of sodium percarbonate is contacted with the compartments to break up agglomerations of organic contaminants and colloidal films as well as to kill bacteria resident within the system. After this pretreatment step any conventional cleaning may be performed to complete the cleaning cycle.
Claims6
A method for defouling ion exchange beds contained in an electrodeionization apparatus comprising the steps of:
- a. providing a solution of sodium percarbonate in water;
- b. contacting the fouled ion exchange beds with said sodium percarbonate solution;
- and
- c. rinsing the ion exchange beds with water to remove the sodium percarbonate and any contaminants from the system.
In the method of cleansing the ion exchange beds of an electrodeionization apparatus, the improvement which comprizes contacting the fouled ion exchange beds with a sodium percarbonate solution and subsequently rinsing the sodium percarbonate solution from the system prior to employing standard cleansing techniques.
Dependencies are inferred from the claim text.