Abstract: The invention relates to a process for anaerobic treatment of material having a solids concentration greater than 15% in a digester in the form of a sealed tank (1) equipped with means (2) for supplying material to be treated and means (3) for discharging digested material and also vertical homogenization means (6) in the form of injectors for injecting a gaseous fluid into the bottom (7) of the tank (1). Through distribution in the tank (1) of the material supply means (2) relative to the discharge means (3) and using vertical homogenization means (6) that guarantee the homogeneity of the material treated by vertical sectors (8) in the tank, conferred on the material in the tank (1) is a forced unidirectional circulation that is uniform throughout the entire cross section of this tank, and along one substantially horizontal component, between said supply means (2) and said discharge means (3). The invention also relates to an installation for implementing such a process.

Abstract: The invention relates to a process for anaerobic treatment of material having a solids concentration greater than 15% in a digester in the form of a sealed tank (1) equipped with means (2) for supplying material to be treated and means (3) for discharging digested material and also vertical homogenization means (6) in the form of injectors for injecting a gaseous fluid into the bottom (7) of the tank (1). Through distribution in the tank (1) of the material supply means (2) relative to the discharge means (3) and using vertical homogenization means (6) that guarantee the homogeneity of the material treated by vertical sectors (8) in the tank, conferred on the material in the tank (1) is a forced unidirectional circulation that is uniform throughout the entire cross section of this tank, and along one substantially horizontal component, between said supply means (2) and said discharge means (3). The invention also relates to an installation for implementing such a process.

Abstract: An apparatus for controlling methane fermentation of organic materials including a main fermentor, sensors associated with the main fermentor for measuring physical-chemical measurements of organic material in the main fermentor, a computer for processing the measurements by using a fermentation model. An additional computer transforms the data of fermentation model into data which affects the operation of the main fermentor. A device is also provided to enable small-scale experimentation in order to adjust the characteristic parameters of the fermentation model incorporated in the computer. The installation allows to maintain the fermentor in optimum biological conditions with a minimum of measurements.

Abstract: The present invention relates to a method and equipment for carrying out the degradation of various organic products or waste in an anaerobic medium. The equipment comprises a plurality of ducts for reinjecting biogas into a fermentation vat sidewise spaced from each other and disposed at least in the major part of the vat, the duct being fed with biogas individually or in groups through independent valves so as to subdivide the fermentation vat into sectors independently fed with biogas. Preferably, a container is provided for storing biogas under pressure. These features lead to a simplification of the equipment and a decrease in the manufacturing costs.

Abstract: A method and apparatus for carrying out a degradation in an anaerobic medium, such as a methanogenesis, of organic products, by-products or waste from human, animal and/or plant origin, involving feeding said products to be degraded into a closed fermentation vessel, forcing said products to flow in a direction of circulation within said vessel and recovering the gas produced called biogas evolved above said body of degraded products, with the feeding and/or discharge of the products performed pneumatically, preferably through pneumatic thrust and, according to a preferred embodiment, by injection of gas, preferably biogas. A further improvement comprises using the biogas produced for homogenizing said body of products contained within said vessel, the pressure of injection being in relation to the actual density of the products, in the injection related section.