C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 11/14 (2006.01) B01D 21/00 (2006.01) B01F 3/12 (2006.01) B01F 5/00 (2006.01) B01F 5/16 (2006.01) B01F 7/00 (2006.01)
Patent
CA 2370922
A process for treating sludge is disclosed. Sludge to which a flocculating agent has been added is stirred by a stirring pump or shear-stirred by a liquid shear-stirrer prior to initiation of flocculation reaction of the flocculating agent to render the flocculating agent in a fine particulate state to thereby disperse, diffuse or distribute the flocculating agent in a fine particulate state throughout the sludge, so that flocks or aggregate structure type flocks or blocks can be efficiently formed. A treating line is constructed such that the sludge can flow therein as a laminar flow. The distance from a flocculating agent injection part to a stirring pump is made to a distance such that the flocculating agent can pass through in a reaction initiation time obtained in advance for the flocculating agent. The time at which flocculation strength of flocks formed by the flocculation reaction of the flocculating agent is maximal is experimentally confirmed in advance and a solid-liquid separator is set at a position where at such time the flocks can reside by the solid-liquid separator.
Un procédé de traitement des boues est divulgué. La boue, à laquelle un floculant a été ajouté, est brassée au moyen d'une pompe de brassage ou brassée par cisaillement à l'aide d'un agitateur par cisaillement avant d'initier la réaction de floculation du floculant pour transformer ce dernier en fines particules qui sont alors dispersées, diffusées ou distribuées dans la boue de manière à former efficacement des flocs, des agrégats ou des blocs de floculation. Une ligne de traitement est tracée de manière que la boue puisse y circuler en un flux laminaire. La distance qui sépare l'injection du floculant à la pompe de brassage est prédéterminée en fonction du temps que met le floculant à initier sa réaction. Le moment où la force de floculation des flocs obtenus de la réaction de floculation du floculant atteint son maximum est confirmé expérimentalement à l'avance et un séparateur solide-liquide est positionné là où les flocs peuvent se retrouver à côté dudit séparateur à ce moment précis.
Robic
The Saitama Livestock Farm (saiboku) Co. Ltd.
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