Composting apparatus, installation and method thereof

B - Operations – Transporting – 09 – B

Patent

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B09B 3/00 (2006.01) B01D 53/84 (2006.01) B01F 3/18 (2006.01) B01F 3/22 (2006.01) B01F 7/24 (2006.01) B01F 15/06 (2006.01) B07B 1/00 (2006.01)

Patent

CA 2644030

There is disclosed a system and method for composting large amounts waste material comprising a predominant amount of compostable organic material, such as Source Separated Organic (SSO) material. The method comprises mixing the waste material with a bulking agent such as tree bark, removing larger inorganic material then compositing the remainder using compositing bacteria and forced air to promote composting. During its initial composting stages when the majority of noxious gasses, fumes and odours are generated the composting is carried out in an enclosed area and the gases removed and treated using a bio-filter. Once the compostable organic material has been adequately decomposed the bulking agent is removed along with any residual inorganic material and the composting process completed. In particular embodiment the bulking agent is recycled. There is also disclosed a method and device for mixing the waste material with the bulking agent.

L'invention a trait à un système et à un procédé permettant de composter de grandes quantités de déchets constitués principalement de matière organique compostable, telle que de la matière organique triée à la source (SSO). Le procédé selon l'invention consiste à mélanger les déchets à un agent gonflant tel que de l'écorce, à éliminer la matière inorganique de plus grande taille, puis à composter le reste en utilisant des bactéries de compostage et de l'air forcé pour favoriser le compostage. Pendant les premières étapes du compostage, au cours desquelles est générée la majorité des gaz, fumées et odeurs toxiques, le compostage est effectué dans une zone fermée, et les gaz sont éliminés et traités à l'aide d'un biofiltre. Une fois que la matière organique est suffisamment décomposée, l'agent gonflant ainsi que toute matière inorganique résiduelle sont éliminés, et le processus de compostage est achevé. Dans des modes de réalisation particuliers, l'agent gonflant est recyclé. L'invention concerne également un procédé et un dispositif permettant de mélanger les déchets à l'agent gonflant.

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