PROCESS FOR CONTROLLING AND REGULATING THE INJECTION OF CO2 IN ORDER TO TREAT AN EFFLUENT

A process for treatment of an effluent, which comprises an injection (3) into the effluent, of CO2 or of a mixture comprising CO2, comprising:a. a measurement of the pH (6) of the effluent is carried out upstream of the point of injection of the CO2 or of the mixture in the process;b. a curve of dose of CO2 to be injected as a function of the pH of a medium for a predetermined volume in litres or in cubic metres was determined beforehand, and this curve is entered into a regulator or automaton (4) capable of controlling the operation of the process;c. the presence of a flow of effluent to be treated is detected, and the dose of CO2 or of mixture, determined by said curve and multiplied by the flow rate of effluent to be treated, is injected.