Method for managing air streams from mechanical dehydration of sludge, and corresponding device

The invention relates to the field of the dehydration of products to be dehydrated such as sludge from a purification plant. More particularly, it relates to a piston press (1) comprising a pressing chamber (2) supplied with sludge and able to manage air streams that it generates, and to a method for using such a press. In a preferred mode of embodiment, the piston press (1) comprises a pipeline (3) having a water removal branch and arranged so as to remove water extracted during a sludge-pressing operation, and an air circulation branch that can channel the volumes of air circulating in the press (1) during the operation thereof, so as to direct the vitiated air, i.e. air that has been brought into contact with the sludge during the implementation of the press, towards a deodorisation system.