Product water from an ozonated capacitive deionization process

Abstract

Unsuitable water from coal bed methane production, CBMPW, is ozonated in a reactor to oxidize iron and the manganese content,—iron from ferrous to ferric, and the manganese from +2 to +4—and kill microbes and destroy other organic material. The water after such treatment is run through a separation means and then a rotating filter, followed by capacitive deionization, to yield clean water, which is treated further to adjust the sodium content to render the water suitable for domestic and agricultural purposes. Some product water is returned through the capacitive deionization cells when no voltage is applied to clean the cells for the next voltage application cycle, and some product water may also be run back through the separation means to help clean out the crud. This product water is suitable for irrigation and can depending on local law be used for drinking either without or with further treatment.

1 . Product water that is made by a process for producing pure water for agricultural and domestic purposes from coal bed methane derived water, which process comprises:
 a) delivering CBM production water to a reaction chamber,   b) introducing ozone into the reaction chamber,   c) reacting the ozone with the CBM production water, to oxidize metal ions therein,   d) delivering the ozonated CBM water to a separation means,   e) filtering the liquid output from the separation means, and removing the oxidized metallic ions and compounds,   f) filtering the water from the separation means,   g) delivering the filtered water to at least one capacitive desalination cell for treatment,   h) activating the at least one desalination cell to produce desalinated water,   i) delivering the product water from the at least one desalination cell to a S.A.R. tank for further sodium content reduction.   
     
     
         2 . Water made by the process of  claim 1  wherein the reaction chamber is a Mazzei™ injector. 
     
     
         3 . The water made by the process of  claim 1  wherein the filtering step comprises passing the water from step e) through a rotating screen filter. 
     
     
         4 . The water produced by the process of  claim 1  wherein the process further includes the step of recycling some of the output from the at least capacitive desalination cell back through a valve system into the at least one desalination cell for cell cleaning purposes. 
     
     
         5 . The water produced by the process of  claim 1  wherein the process further includes the step of recycling some of the output from the S.A.R. tank back through a valve system into the at least one desalination cell for cell cleaning purposes. 
     
     
         6 . The water produced by the process of  claim 1 , wherein the process further includes the step of recycling some of the output from both the at least one capacitive desalination cell and some of the output from the S.A.R. tank, back a valve system into the at least one desalination cell for cell cleaning purposes. 
     
     
         7 . The water produced by the process of  claim 1  wherein the separation means of step d) is a sedimentation tank. 
     
     
         8 . The water produced by the process of  claim 1  wherein the separation means of step d) is a cyclonic separator. 
     
     
         9 . The water produced by the process of  claim 1  wherein the separation means of step d) is a Couette reactor/separator. 
     
     
         10 . Product water that is made by a process for producing pure water for agricultural and domestic purposes from coal bed methane derived water, which process comprises:
 a) delivering CBM production water to a reaction chamber which is a Mazzei injector,   b) introducing ozone into the reaction chamber,   c) reacting the ozone with the CBM production water, to oxidize metal ions therein,   d) delivering the ozonated CBM water to a separation means,   e) filtering the liquid output from the separation means, and removing the oxidized metallic ions and compounds,   f) filtering the water from the separation means, wherein the filtering step comprises passing the water from step e) through a rotating screen filter,   g) delivering the filtered water to at least one capacitive desalination cell for treatment,   h) activating the at least one desalination cell to produce desalinated water,   i) delivering the product water from the at least one desalination cell to a S.A.R. tank for further sodium content reduction.   
     
     
         11 . The water produced by the process of  claim 10  wherein the process further includes the step of recycling some of the output from the S.A.R. tank back through a valve system into the at least one desalination cell for cell cleaning purposes. 
     
     
         12 . The water produced by the process of  claim 10  wherein the separation means of step d) is a Couette reactor/separator. 
     
     
         13 . The water produced by the process of  claim 10  wherein the process further includes the step of recycling some of the output from the at least capacitive desalination cell back through a valve system into the at least one desalination cell for cell cleaning purposes. 
     
     
         14 . The water produced by the process of  claim 10 , wherein the process further includes the step of recycling some of the output from both the at least one capacitive desalination cell and some of the output from the S.A.R. tank, back a valve system into the at least one desalination cell for cell cleaning purposes.