Method and system for the production of biofertilisers

C - Chemistry – Metallurgy – 02 – F

Patent

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C02F 11/16 (2006.01) C05F 5/00 (2006.01)

Patent

CA 2611292

The invention relates to a method and system for the production of biofertilisers from dried, stabilised sludge that is rich in fertiliser materials, originating from a method for the treatment of highly-loaded effluents. The inventive solution can be integrated into an existing facility for the treatment of organic industrial, municipal or agricultural effluents (100). The invention is based on the recovery of the heat energy released during the treatment steps in one such system by the bioreactors (120), the air supercharger units (122), the biodrying (500) and drying (600) units and other units. Said energy recovery creates a synergism which increases the efficiency and performance of the bioreactors (120) following increased stability resulting from the regulation of the temperature, thereby generating a significant energy saving during the final drying step in the production of biofertilisers.

L'invention concerne une méthode et un système de production de biofertilisants, à partir de boues stabilisées, séchés et riches en matières fertilisantes en provenance de procédé de traitement d'effluents à forte charge. Cette solution peut être intégrée à une installation déjà existante de traitement d'effluents organiques industriels, municipaux ou agricoles (100), et elle est basée sur la récupération de l'énergie thermique dégagée pendant les étapes de traitement d'un tel système par les bioréacteurs (120), les unités de surpression d'air (122), les unités de bioséchage (500) et de séchage (600), et autres unités. Cette récupération d'énergie créée une synergie permettant l'augmentation de l'efficacité et du rendement des bioréacteurs (120) suite à une plus grande stabilité provenant de la régulation de la température, assurant ainsi une importante économie d'énergie pour l'étape finale de séchage dans la production des biofertilisants.

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