| 摘要 |
The continuous treatment of a flow of organic liquid sludge is disclosed. Following the optional addition of granular mineral matter to the flow, the sludge is injected at a rate q into a column of air which is at overpressure relative to atmospheric pressure. The air column is circulating at a rate Q>5 q in a chamber extending over a specific length in order to create a fluidized bed, in which the sludge is aerolized, between air supply piping upstream of the sludge injection and an outlet reservoir downstream of the fluidized bed, the reservoir being substantially at atmospheric pressure. A flocculant is introduced continuously downstream of the chamber into the fluidized bed in order to aggregate the organic matter before the solid part obtained in this way is separated from the liquid part, the resulting solid part thus being deodorized. |
| 主权项 |
1. A method for continuously treating a flow of liquid sludge, wherein the flow is injected at a flow rate q into a chamber at an increased pressure compared with atmospheric pressure, while also injecting air at a flow rate Q≧5 q into said chamber, prior to evacuation and separation between solid and liquid parts obtained, downstream of the chamber,
wherein the liquid sludge is an organic sludge, the method being applied to the deodorization of the solid part obtained, in that the sludge is injected into a column of air at an increased pressure that is itself injected at said flow rate Q≧5 q, said column extending over a given length L along a longitudinal axis, said length L, the flow rate and the increased pressure of said column of air being designed to create in the chamber a fluidized bed wherein the sludge is aerolized, between a pipe for feeding the air and a line or a reservoir downstream of the fluidized bed obtained, in that said fluidized bed is evacuated into said line or said reservoir that is pressurized to atmospheric pressure or substantially to atmospheric pressure, and in that a flocculant is continuously introduced into said fluidized bed downstream of the chamber, under conditions designed to aggregate and/or coagulate the organic matter so that a deodorization of the solid part obtained after separation is obtained. |
