C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 11/16 (2006.01) C02F 11/00 (2006.01) C02F 11/12 (2006.01) C02F 11/14 (2006.01) C10L 5/32 (2006.01) C10L 5/46 (2006.01)
Patent
CA 2223009
A waste sludge treatment process, in which a solid additive (2a, 2b) is mixed into sludge (1) introduced into said process, and the resulting mixture is further treated (4-12) to produce solid products (11), is characterized in that the solid additive includes aggregate-like hydrophobic grains of peat, which may make up at least one half of the solid additive. The mixture is further treated advantageously by means of extrusion (6), using a method that makes it possible to remove water extracted from the extruded material. The produced particles are hardened and made hygienic by essentially preventing bacterial action within them. For this reason, the particles are coated with a coating formed by a mixture of lime and water on ash and water.
L'invention concerne un procédé pour traiter une boue résiduaire, dans lequel un additif solide (2a, 2b) est mélangé avec la boue en question (1) et le mélange résultant est traité (4-12) pour fournir des produits solides (11). Le trait caractéristique de l'invention est que l'additif solide contient des grains agglomérés et hydrohobes de tourbe, qui peuvent constituer jusqu'à au moins la moitié de l'additif solide. Le mélange est ensuite traité d'une manière avantageuse par extrusion (6) au moyen d'un procédé qui permet d'éliminer l'eau extraite du matériau extrudé. Les particules produites sont durcies et assainies, essentiellement pour y empêcher une activité bactérienne. Pour cela, les particules reçoivent un revêtement constitué d'un mélange de chaux et d'eau ou de cendres et d'eau.
Borden Ladner Gervais Llp
Torkkeli Esko
LandOfFree
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