| abstract |
The process for the treatment of raw or liquid digestate resulting from a phase separation step, leaving a methanization unit with a thick or liquid channel, the methanisation unit comprising, upstream, a preparation system and / or introduction of the material comprises: - a step (102) of air passage into or on the surface of said digestate contained in a tank 5 for extracting at least ammonia to the atmosphere of the tank and - a step (103) for extracting the ammonia contained in the atmosphere, and - a step of reinjection of the digestate after passage of air, to the upstream system for preparing and / or introducing the material. In embodiments, the step of air passage in or on the surface of the digestate contained in the tank is carried out in the absence of addition of chemical product capable of accumulating by-products in the digestate. |