Methods and stabilized compositions for reducing deposits in water systems

摘要

A stabilized mixed oxidant solution may be produced by flowing a starting solution (e.g., salt brine, hypochlorous acid, and/or sodium hypochlorite) through a flow-through electrochemical module including first and second passages separated by an ion permeable membrane while electric power is applied between an anode and cathode in electrical communication with the first and second passages, respectively. An initially acidic anolyte solution received from the first (anode) passage is stabilized by elevating pH to yield a stabilized mixed oxidant solution. Methods of using the mixed oxidant solution are further provided.

主权项

1. A method for promoting disinfection and reduction of deposits in a water-containing system utilizing (a) a primary disinfectant and (b) a mixed oxidant solution comprising a plurality of different oxidants produced by flowing at least one starting solution including at least one of salt brine, hypochlorous acid, and sodium hypochlorite through at least one flow-through electrochemical module comprising a first passage and a second passage separated by an ion permeable membrane while electric power is applied between (i) an anode in contact and electrical communication with the first passage and (ii) a cathode in contact and electrical communication with the second passage, wherein a first solution or first portion of the at least one starting solution is flowed through the first passage to form an anolyte solution having an acidic pH, and a second solution or second portion of the at least one starting solution is simultaneously flowed through the second passage to form a catholyte solution having a basic pH, and contacting the anolyte solution with a hydroxide solution to attain a pH value of at least 9.0 to yield said mixed oxidant solution, wherein production of the mixed oxidant solution comprises at least one of the following items (i) and (ii): (i) no portion of the hydroxide solution is flowed through the at least one flow-through electrochemical module, and (ii) the at least one starting solution comprises at least one of hypochlorous acid and sodium hypochlorite, the method comprising:
blending the primary disinfectant and the mixed oxidant solution, and supplying an effective amount of primary disinfectant and mixed oxidant solution to the water-containing system; or co-injecting the primary disinfectant and the mixed oxidant solution, and supplying an effective amount of primary disinfectant and mixed oxidant solution to the water-containing system.