Paper and Pulp Production - CO2 economically neutralizes the alkalinity in tall oil soap recovery and bleachery effluents resulting from lime treatment. Concrete Production - CO2 injection decreases pH of truck wash water permitting sewer discharge. Power Plants - CO2 is effectively used in water preparation and for cooling water circuits. Laundry Plants - CO2 controls the pH levels of wash water discharges. CO2 is combined with water to form carbonic acid in a reversible reaction.
Carbonic acid dissociates into carbonates and hydrogen ions in a reversible reaction.
The bicarbonates further dissociate into carbonates and hydrogen ions in a reversible reaction. The CO2 storage tank is carbon steel and wrapped in polyurethane foam insulation and a metal jacket. A vapor-recovering refrigeration unit condenses any excess vapor and returns the liquid to the tank. This permits storage with zero losses. This style of tank ranges in capacities from 6,000 pounds to 120,000 pounds.