Method for cleaning a filtration installation of the type with immersed membranes
First Claim
1. Method of cleaning a filtration installation comprising a plurality of immersed membranes in at least one tank containing an effluent to be filtered, said method being characterized in that it includes:
- at least partially draining the effluent contained in said tank and exposing said membranes to air; and
directing at least one cleaning solution through the membranes along a flow path opposite to a filtration flow of the effluent by feeding in said cleaning solution from a permeate side of said membranes.
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Accused Products
Abstract
The invention relates to a method of cleaning a filtration installation of the type including a plurality of immersed membranes in at least one tank containing an effluent to be filtered, said method being characterised in that it includes the steps consisting of:
at least partially draining the effluent contained in said tank in a way that exposes said membranes to the air;
causing at least one cleaning solution to pass through said membranes along a flow path opposite to the filtration flow of the effluent by feeding in said cleaning solution from the permeate side of said membranes.
156 Citations
14 Claims
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1. Method of cleaning a filtration installation comprising a plurality of immersed membranes in at least one tank containing an effluent to be filtered, said method being characterized in that it includes:
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at least partially draining the effluent contained in said tank and exposing said membranes to air; and directing at least one cleaning solution through the membranes along a flow path opposite to a filtration flow of the effluent by feeding in said cleaning solution from a permeate side of said membranes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system comprising:
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a) at least one treatment tank; b) a plurality of filtration membranes, each having a top and a bottom, vertically installed inside said at least one treatment tank; c) means for feeding an effluent to be filtered into said tank; d) means for draining said tank and at least partially exposing said membranes; e) means for discharging a permeate from said membranes; f) at least one storage reservoir for holding a solution for cleaning said membranes; g) means for feeding said cleaning solution through said membranes in a direction opposite to a direction taken by the effluent as it moves through said membranes; and h) wherein said membranes are cleaned by partially draining said tank through said draining means, thereby exposing said membranes to air prior to feeding the cleaning solution to the membranes through said feeding means. - View Dependent Claims (14)
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Specification