Water treatment
AssigneeVeolia Water Solutions & Technologies Support
InventorsAndrew Cannon, William Jeal
Life of this patent
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Abstract
A water treatment apparatus (1), the apparatus (1) comprises a fluid inlet (2), a first MBBR (4) and a second MBBR (5) and a fluid outlet (3), and a controller (C1), wherein the first MBBR (4) and second MBBR (5) are connected in series such that water to be treated flows from the inlet (2) through the first MBBR (4) to the second MBBR (5) and thence to the outlet (3) and wherein the controller or control means (C1) is operable to change the flow direction such that water to be treated flows from the inlet (2) to the second MBBR (5) then to the first MBBR (4) and thence to the outlet (3).
Claims16
A water treatment apparatus, the apparatus comprising a fluid inlet, a first MBBR and a second MBBR and a fluid outlet, and a controller, each of the first MBBR and the second MBBR having an air blower for aerating the contents of said MBBR configured to generate a dissolved oxygen level of 3 mg/L or greater, wherein the first MBBR and second MBBR are connected in series such that water to be treated flows from the inlet through the first MBBR to the second MBBR and thence to the outlet and wherein the controller is operable to change the flow direction such that water to be treated flows from the inlet to the second MBBR then to the first MBBR and thence to the outlet, wherein the apparatus comprises an ammonia sensor to determine the level of ammonia upstream and/or downstream thereof and wherein the controller is operable to reverse the flow through the first and second MBBRs depending on ammonia concentration, load or flux determined by the ammonia sensor.
A method of treating waste water, the method comprising the steps of:
- a. flowing waste water through an inlet to a first MBBR and thence to a second MBBR and thence to an outlet;
- b. aerating the contents of each of the first MBBR and the second MBBR by blowing or forcing air in the MBBR by air blowers to generate a dissolved oxygen level of 3 mg/L or greater;
- c. determining the level of ammonia upstream, within and/or downstream thereof using an ammonia sensor;
- and
- d. deploying a controller to reverse the flow direction depending on ammonia concentration, load or flux determined by the ammonia sensor, such that waste water flows from the inlet to the second MBBR and thence to the first MBBR and thence to the outlet.
Dependencies are inferred from the claim text.