C - Chemistry – Metallurgy – 05 – F
Patent
C - Chemistry, Metallurgy
05
F
C05F 17/00 (2006.01) A23K 1/00 (2006.01)
Patent
CA 2178909
A batch process for the conversion of organic solid waste material containing cellulose and lignin through liquid thermophilic aerobic digestion comprises comminuting the organic solid waste material, adjusting the moisture content of the comminuted material to at least 90 % parts by weight of water, mixing the comminuted material with a thermophilic aerobic microorganism, adjusting the pH of the mixture to 5.5-7.5 and supplying heat and oxygen to the mixture to effect thermophilic aerobic digestion of the mixture. The thermophilic aerobic digestion of the mixture is terminated after the mixture has stabilized as a low nitrogen material but prior to digestion of the cellulose and lignin in the mixture, and the stabilized mixture is separated into solid and liquid fractions.
Procédé discontinu de conversion de déchets solides de matériaux organiques contenant de la cellulose et de la lignine par digestion thermophile aérobie en phase liquide et consistant à désintégrer les déchets solides de matériaux organiques, à ajuster le contenu en eau du matériau désintégré à 90 % en poids, à mélanger le matériau désintégré à un micro-organisme aérobie thermophile, à maintenir le pH de la solution entre 5,5 et 7,5, et à couper les apports de chaleur et d'oxygène au mélange pour permettre sa digestion thermophile aérobie. La digestion du mélange est terminée lorsque qu'il se stabilise à un faible niveau d'azote mais avant que n'intervienne la digestion de la cellulose et de la lignine. Le mélange stabilisé subit ensuite une séparation en fraction liquide et fraction solide.
Long And Cameron
Van Slyke J. Victor
Walsh Philip J.
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