Importance

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Abstract

Sequential biological reactor (R), comprising: a tank (1) delimited by a base and peripheral walls (3); an inlet (11) equipped with a selector (S) that determines a baffled route with contacting of the effluent to be treated and a portion (5) of the recirculated sludges; a means (6) for discharging the treated water in the top part of the water surface of the tank, and an outlet (7) for discharging the excess sludges in the bottom of the tank. The selector (S) comprises a vessel (8) placed in the tank (1) at a distance from the peripheral walls (3); the vessel is compartmentalized into several sectors (8.1, 8.2, 8.3, 8.4), the outlet from one sector, which is also the inlet of the following sector, being alternately low and high, or vice versa, and a last step is defined by a chamber (13) formed by two partitions (14, 15) that extend between the wall of the vessel (8) and the peripheral walls (3) of the tank and that surround the top outlet (12) of the last sector of the vessel, the lower edge of the partitions being at a distance from the base and determining two low openings for passage of the effluent into the tank.

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