Method and appartus for the treatment of unstructured or...

B - Operations – Transporting – 09 – B

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B09B 3/00 (2006.01) C02F 11/04 (2006.01) C12M 1/107 (2006.01) C12M 1/113 (2006.01) C12M 1/14 (2006.01) C12P 5/02 (2006.01)

Patent

CA 2376994

According to the invention, the unstructured or loosely structured organic waste is comminuted to a maximum grain size of 3 mm and standardized to a homogenous paste (11) with a dry matter content of 5 to 22 % which is then fed to an acidic hydrolysis for a maximum of 24h, after which the paste is subjected to a controlled-temperature methanisation. A vibrating colloid mill is used in the comminution process, a hydrolysis vessel (13), equipped with a vane-type rotary pump, a gas evacuation device and a heating element is used for hydrolysis and for methanisation, an anaerobically operating disc reactor (19) is used which can be heated and fed with gas and which comprises a rotational drive.

Selon l'invention, les déchets biologiques exempts de structures ou pauvres en structures sont fragmentés en grains d'une grandeur maximale de 3 mm et transformés en une pâte (11) homogène présentant une teneur en substance sèche de 5 à 22 %. Cette pâte est ensuite conduite à un dispositif d'hydrolyse acide où elle reste pendant 24 h au maximum, puis elle est soumise à une méthanisation à température contrôlée. Pour réaliser la fragmentation desdits déchets, on utilise un broyeur de colloïdes à vibrations, pour réaliser l'hydrolyse, on utilise un contenant à hydrolyse (13) pourvu d'une pompe à tiroirs rotatifs, d'un dispositif d'aspiration de gaz et d'un chauffage, et, pour effectuer la méthanisation, on utilise un réacteur à disques (19) pouvant être chauffé et alimenté en gaz, à fonctionnement anaérobie et comportant un entraînement en rotation.

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