Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1996-08-27
1998-06-23
Hruskoci, Peter A.
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210713, 210714, 210727, 210738, 210921, C02F 156
Patent
active
057700915
ABSTRACT:
An untreated flow of waste water is normally introduced into a plain sedimentation unit during plain sedimentation periods to separate it into sand and a flow treated by plain sedimentation. During other periods, for example periods of heavy rain, a coagulating agent, ballast sand and a flocculating agent are introduced. The coagulated flow is passed into a maturation intermediate area and then, with substantially all the sand and colloids of particles attached to it, into the plain sedimentation unit. Here effluent is separated by plain sedimentation and evacuated and sludge made up of the sand and the adhering colloids and particles is extracted and evacuated via an extraction system and the sand outlet channel of the plain sedimentation unit. The sludge is collected, the ballast sand is separated from it to be recycled into the sand injection area and the sludge and excess sand are extracted.
REFERENCES:
patent: 3350302 (1967-10-01), Demeter et al.
patent: 4927543 (1990-05-01), Bablon et al.
patent: 4997573 (1991-03-01), Browne
Badard Michel
Binot Patrick
Ursel Valery
Hruskoci Peter A.
Omnium de Traitement et de Valorisation
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