METHOD AND DEVICE FOR TREATING AN ORGANIC EFFLUENT

摘要

Treating an organic effluent is disclosed. The effluent is fed in a continuous flow at a rate q via a first chamber maintained at a first pressure and/or directly through a first narrowing to a second chamber or container maintained at a second medium pressure by the injection of air into the second chamber at a rate Q in order to obtain an emulsion in the second chamber. A head loss is generated in the emulsion optionally modified by a second and/or third narrowing or a feed valve for a third chamber maintained at a third pressure in the region immediately downstream of the second or third narrowing and/or valve. A flocculant is injected into the region of the third chamber. The emulsion at atmospheric pressure then being degasified and the emulsion thus degasified being recovered in a filtration or decanting device.

主权项

1. A process for the treatment of an organic sludge, in which the said sludge is fed as a continuous stream at a flow rate q (m3/h), either directly or via a first chamber maintained at a predetermined first pressure (P1) to a second chamber maintained at a predetermined second mean pressure (P2, P′, P1″, P2″) by injecting air into the said second chamber at a flow rate Q (Sm3/h), in order to obtain in the said second chamber a first emulsion, forming a dispersed phase of sludge in a continuous phase of air which surrounds it, a predetermined pressure drop is created in the said first emulsion by causing it to pass, via one or two restrictions or via a feed valve into a third chamber maintained at a predetermined third pressure (P4, P2′, P3″) in the region located immediately downstream of the said restriction(s) or of the said valve,
a flocculant is injected into the said region of the third chamber in order to form at the outlet of the treatment a second emulsion of air in the thickened flocculated sludge, then the said second emulsion is degassed to atmospheric pressure before discharge, the said second emulsion is recovered in a device for filtration or for separation by settling, and it is filtered or separated by settling.