Membrane cleaning with pulsed airlift pump
First Claim
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1. A water treatment system comprising:
- a plurality of membrane modules arranged in a water treatment tank;
a plurality of gas-lift pumps positioned below the plurality of membrane modules, each of the plurality of gas-lift pumps constructed and arranged to deliver a pulsed two-phase gas/liquid flow that is random in at least one of magnitude, frequency, and duration to each of the plurality of membrane modules.
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Abstract
A method of cleaning a membrane surface immersed in a liquid medium with a fluid flow, including the steps of providing a randomly generated intermittent or pulsed fluid flow along the membrane surface to dislodge fouling materials therefrom. A membrane module is also disclosed comprising a plurality of porous membranes (6) or a set of membrane modules (5) and a device (11) for providing a generally randomly generated, pulsed fluid flow such that, in use, said fluid flow moves past the surfaces of said membranes (6) to dislodge fouling materials therefrom.
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Citations
10 Claims
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1. A water treatment system comprising:
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a plurality of membrane modules arranged in a water treatment tank; a plurality of gas-lift pumps positioned below the plurality of membrane modules, each of the plurality of gas-lift pumps constructed and arranged to deliver a pulsed two-phase gas/liquid flow that is random in at least one of magnitude, frequency, and duration to each of the plurality of membrane modules. - View Dependent Claims (2, 3, 4)
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5. A water treatment system comprising:
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a membrane module immersed in a liquid feed in a tank; a chamber positioned below the membrane module and having a first inlet fluidly connected to the liquid feed; a source of gas fluidly connected to a second inlet in the chamber; and a chamber outlet fluidly connected to the membrane module and constructed and arranged to allow for a two-phase gas/liquid flow that is random in at least one of magnitude, frequency, and duration. - View Dependent Claims (6, 7, 8, 9, 10)
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Specification