Method of producing biocides from industrial process waters

Abstract

Method of producing biocides from an aqueous flow of process water, said method comprising the step of subjecting a water flow containing ions which give rise to conductivity through an electrolysis cell in order to generate chemicals with biocidal performance. The method can be used for treating fresh and waste water systems, such as water streams of cooling systems, fermentation, mining and biorefining, for example papermaking process waters. It can be used for reducing halogen concentration.

1 . Method of producing biocides from an aqueous flow of process water, said method comprising the step of conducting a water flow exhibiting a property of conductivity through at least one electrolysis cell in order to generate chemicals with biocidal performance. 
     
     
         2 . The method according to  claim 1 , wherein the process water flow is subjected to direct electrolysis. 
     
     
         3 . The method according to  claim 1 , wherein the process water flow is subjected to electrolysis in order to reduce conductivity of the water by at least 5%. 
     
     
         4 . The method according to  claim 1 , wherein the process water flow is selected from the group of fresh and waste water systems. 
     
     
         5 . The method according to  claim 1 , comprising decreasing the conductivity level of the process by decreasing the halogen concentration. 
     
     
         6 . The method according to  claim 1 , comprising subjecting the water to electrolysis in an electrochemical cell. 
     
     
         7 . The method according to  claim 1 , comprising subjecting the water to electrolysis at a current in the range of 1 to 150 A and a voltage of 1 to 250 V. 
     
     
         8 . The method according to  claim 1 , comprising subjecting the process water having a consistency of 0.1 to 20% by mass to electrolysis. 
     
     
         9 . The method according to  claim 1 , comprising subjecting the process water to electrolysis in a plurality of electrolysis cells arranged in parallel or serial arrangement. 
     
     
         10 . (canceled)