Device for the decarbonization of biogas, characterized in that it comprises: - a first tank , for holding a volume of liquid comprising lime and water, comprising: - a first portion comprising: - an inlet for biogas in the liquid; - an inlet for the liquid; and - an overflow wall for the spillover of the liquid towards a second portion ; - the second portion comprising: - a means for collecting calcium carbonate; and - an outlet for the liquid and the decarbonized biogas, configured to release a portion of the liquid when the volume of liquid in the first tank is greater than a predefined maximum retention volume; - a second tank , for holding a volume of liquid comprising lime and water, comprising: - an inlet for liquid released by the first tank; - an inlet for decarbonized biogas from the first tank; - an outlet for decarbonized biogas; and - an outlet for the liquid; - a recirculation line for recirculating the liquid output from the second tank towards the first tank; - a means for recirculating the liquid output from the second tank towards the first tank; - a sensor for determining the pH of the liquid; and - a means for supplying lime to the liquid when the pH of the liquid is below a predefined setpoint. - a first tank , for holding a volume of liquid comprising lime and water, comprising: - a first portion comprising: - an inlet for biogas in the liquid; - an inlet for the liquid; and - an overflow wall for the spillover of the liquid towards a second portion ; - the second portion comprising: - a means for collecting calcium carbonate; and - an outlet for the liquid and the decarbonized biogas, configured to release a portion of the liquid when the volume of liquid in the first tank is greater than a predefined maximum retention volume; - a first portion comprising: - an inlet for biogas in the liquid; - an inlet for the liquid; and - an overflow wall for the spillover of the liquid towards a second portion ; - an inlet for biogas in the liquid; - an inlet for the liquid; and - an overflow wall for the spillover of the liquid towards a second portion ; - the second portion comprising: - a means for collecting calcium carbonate; and - an outlet for the liquid and the decarbonized biogas, configured to release a portion of the liquid when the volume of liquid in the first tank is greater than a predefined maximum retention volume; - a means for collecting calcium carbonate; and - an outlet for the liquid and the decarbonized biogas, configured to release a portion of the liquid when the volume of liquid in the first tank is greater than a predefined maximum retention volume; - a second tank , for holding a volume of liquid comprising lime and water, comprising: - an inlet for liquid released by the first tank; - an inlet for decarbonized biogas from the first tank; - an outlet for decarbonized biogas; and - an outlet for the liquid; - an inlet for liquid released by the first tank; - an inlet for decarbonized biogas from the first tank; - an outlet for decarbonized biogas; and - an outlet for the liquid; - a recirculation line for recirculating the liquid output from the second tank towards the first tank; - a means for recirculating the liquid output from the second tank towards the first tank; - a sensor for determining the pH of the liquid; and - a means for supplying lime to the liquid when the pH of the liquid is below a predefined setpoint. <EOS>