Lime softening water treatment plants require some form of recarbonation to convert carbonate alkalinity to bicarbonate alkalinity and stabilize the water before filtration to produce a stable effluent.  Recarbonation with CO₂ is also practiced to reduce scaling of any filter media in downstream processes.  This pH adjustment can be accomplished with a mineral acid such as sulfuric acid, or by using carbonic acid which is produced when the treated water is injected with carbon dioxide.  Carbon dioxide mitigates some of the common concerns associated with mineral acids such as spills and containment, production of unwanted residuals, and instead allows for greater ease of handling as well as allowing the operator to more accurately reduce and control the pH of the treated water.  Many industrial processes also result in water with high pH (basic) attributes.  This process water must be treated before it can be re-used, discharged, or released to a wastewater treatment facility.   

Our CDOX units are the most efficient way to introduce this carbon dioxide into your water and wastewater treatment processes.