Method for ultra-dehydrating thickened or pasty biomass products, and equipment for implementing the method

A method for ultra-dehydrating thickened or pasty products, forming a biomass, wherein the products are subjected to the following steps:

• hydrothermal carbonization treatment, comprising a pressurization and a thermal conditioning for a residence time in a closed reactor, followed by a decompression,
• then dehydration of the products by a ram press, obtaining a dryness of greater than 50%,
• the temperature of the product upstream of the dehydration by the ram press being regulated by cooling between 40° C. and 90° C. in order to optimize the filterability in the ram press,
• the steps of the method being carried out in a confined space that makes it possible to prevent the diffusion of odors into the atmosphere,
• wherein the ram press is provided in order to carry out a pressing of the products through flexible drains that form filters, which are permeable to the liquid that passes from the outside to the inside of the drains under the effect of the pressure between two plates between which the drains extend, which drains deform when the plates approach one another, whilst the solid materials are retained on the outside of the drains in order to be discharged during the disassembling.