Water treatment apparatus that can reduce water treatment time

Abstract

In a water treatment apparatus, the time for treatment after water to be treated is introduced into an electrolytic bath is reduced. The water to be treated in a reservoir is subjected to electrolysis at a first electrolytic bath. Electrolysis is carried out at respective first and second electrolytic baths. By the electrolysis at the second electrolytic bath, hypochlorous acid is generated from chloride ions at the anode side. The solution subjected to electrolysis at the second electrolytic bath is mixed at a predetermined site of the pipe connected between the reservoir and the first electrolytic bath with the water output from the reservoir via a pipe prior to introduction into the first electrolytic bath. Accordingly, the water subjected to electrolysis at the first electrolytic bath can be sterilized in advance by the hypochlorous acid generated by electrolysis at the second electrolytic bath.

1 . A water treatment apparatus comprising: 
 a first electrolytic bath into which water to be treated is introduced from a predetermined vessel,    a first pair of electrodes stored in said first electrolytic bath,    a first pipe connecting said predetermined vessel with said first electrolytic bath, and through which the water to be treated passes,    a second electrolytic bath storing a solution,    a second pair of electrodes stored in said second electrolytic bath, and    a second pipe connecting said second electrolytic bath with said first pipe, and through which the solution of said second electrolytic bath passes.    
     
     
         2 . The water treatment apparatus according to  claim 1 , wherein 
 said second pipe is connected to said first pipe at a predetermined site of said first pipe, and    said predetermined site is located where the water to be treated of said predetermined vessel to be introduced into said first electrolytic bath can react with a compound included in the water to be treated from said second electrolytic bath via said second tube, during passage from said predetermined site of said first pipe and prior to introduction into said first electrolytic bath.    
     
     
         3 . A water treatment apparatus comprising: 
 a buffer tank into which water to be treated is introduced from a predetermined vessel,    a chemical agent introduction unit to introduce a chemical agent into said buffer tank,    a pair of electrodes, and    an electrolytic bath storing said pair of electrodes and the water to be treated of said buffer tank.    
     
     
         4 . The water treatment apparatus according to  claim 3 , wherein the chemical agent to be introduced by said chemical agent introduction unit includes a chemical agent supplying chloride ions into the water to be treated in said buffer tank.  
     
     
         5 . The water treatment apparatus according to  claim 4 , wherein the chemical agent to be introduced by said chemical agent introduction unit includes sodium chloride.  
     
     
         6 . The water treatment apparatus according to  claim 4 , further comprising: 
 a chloride ion concentration detection unit detecting a concentration of chloride ions in said buffer tank, and    a first ion concentration control unit controlling an operation of introducing a chemical agent by said chemical agent introduction unit based on a detected output from said chloride ion concentration detection unit.    
     
     
         7 . The water treatment apparatus according to  claim 4 , further comprising: 
 an electric conductivity detection unit detecting an electric conductivity of water to be treated that is introduced into said buffer tank, and    a second ion concentration control unit controlling an operation of introducing a chemical agent by said chemical agent introduction unit based on a detected output from said conductivity detection unit.    
     
     
         8 . The water treatment apparatus according to  claim 3 , wherein the chemical agent to be introduced by said chemical agent introduction unit includes a chemical agent to adjust a pH of the water to be treated in said buffer tank.  
     
     
         9 . The water treatment apparatus according to  claim 8 , wherein the chemical agent to adjust the pH includes concentrated sulfuric acid and/or sodium hydroxide.  
     
     
         10 . The water treatment apparatus according to  claim 8 , wherein said chemical agent to adjust the pH includes hydrochloric acid.  
     
     
         11 . The water treatment apparatus according to  claim 8 , further comprising: 
 a pH detection unit detecting a pH in said buffer tank, and    a pH control unit to control an operation of introducing a chemical agent by said chemical agent introduction unit based on a detected output from said pH detection unit.