MEMBRANE CLEANING WITH PULSED GAS SLUGS
First Claim
1. A membrane filtration system comprising:
- a plurality of membrane modules positioned in a feed tank, at least one of the membrane modules having a gas slug generator positioned below a lower header thereof, the gas slug generator configured and arranged to deliver a gas slug along surfaces of membranes within the at least one of the membrane modules; and
a global aeration system configured to operate independently from an aeration system providing a gas to the gas slug generator, the global aeration system configured and arranged to induce a global circulatory flow of fluid throughout the feed tank.
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Accused Products
Abstract
Aspects and embodiments of the present application are direction to systems and methods for treating fluids and to systems and methods for cleaning membrane modules used in the treatment of fluids. Disclosed herein is a membrane filtration system and a method of operating same. The membrane filtration system comprises a plurality of membrane modules positioned in a feed tank, at least one of the membrane modules having a gas slug generator positioned below a lower header thereof, the gas slug generator configured and arranged to deliver a gas slug along surfaces of membranes within the at least one of the membrane modules and a global aeration system configured to operate independently from an aeration system providing a gas to the gas slug generator, the global aeration system configured and arranged to induce a global circulatory flow of fluid throughout the feed tank.
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Citations
19 Claims
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1. A membrane filtration system comprising:
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a plurality of membrane modules positioned in a feed tank, at least one of the membrane modules having a gas slug generator positioned below a lower header thereof, the gas slug generator configured and arranged to deliver a gas slug along surfaces of membranes within the at least one of the membrane modules; and a global aeration system configured to operate independently from an aeration system providing a gas to the gas slug generator, the global aeration system configured and arranged to induce a global circulatory flow of fluid throughout the feed tank. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of filtration comprising:
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flowing a liquid medium into a filtration vessel including a plurality of membrane modules positioned therein, each of the membrane modules including an associated gas slug generator positioned below a lower end thereof; withdrawing permeate from the plurality of membrane modules; periodically delivering gas slugs from the gas slug generators into the membrane module associated with each gas slug generator, the gas slugs passing along membrane surfaces within each of the membrane modules to dislodge fouling materials therefrom; and initiating and terminating a global circulatory flow through the filtration vessel responsive to signals derived from at least one of a permeate flow from the membrane modules, a feed flow into the filtration vessel in which the membrane modules are immersed, and a transmembrane pressure across the membranes of at least one of the membrane modules. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification