Bio-methane production plant and method for controlling such a plant

The plant (1) comprises: - a methanizer (2), producing a flow of bio-gas; - a scrubber (7) separating the flow of biogas into a flow of bio-methane and a flow of impurities; an injection station (11) for bio-methane in a gas transmission or distribution network (13); a conditioning unit (19), configured to selectively take at least a portion of the bio-methane stream and condition the bio-methane as at least one high-density product; a storage unit (21) for the or each high-density product; a deconditioning unit (23), configured to selectively convert the or each high density product stored in the storage unit (21) to an additional flow of bio-methane and to provide the additional flow of bio-methane to the station injection (11).