Module cleaning method
First Claim
1. An aeration/backwash device configured for use with a membrane filtration module comprising one or more membranes and opposing potted ends, comprising:
- a communication chamber including a closed internal volume defined by an inner wall, an outer wall, an upper wall coupling the inner wall to the outer wall, and a lower wall coupling the inner wall to the outer wall, the communication chamber at least partially surrounding a circumference of the membrane filtration module, the inner wall having upper through-openings and lower through-openings vertically spaced apart from the upper through-openings, the upper and lower through-openings spaced circumferentially about the inner wall, each through-opening having a longitudinal axis substantially perpendicular to the one or more membranes;
a source of gas in fluid communication with the internal volume of the communication chamber; and
a source of backwash liquid in fluid communication with the internal volume of the communication chamber,wherein the source of gas and the source of backwash liquid share a common inlet to the internal volume of the communication chamber.
10 Assignments
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Accused Products
Abstract
An aeration/backwash device (16) for use with a porous membrane filtration module (5) including one or more membranes (6) extending longitudinally between vertically spaced upper (7) and lower headers (8) into which the ends of the membranes are potted. The membranes (6) having a permeable wall which, in use, is subjected to a filtration operation wherein feed containing contaminant matter is applied to one side of the membrane wall and filtrate is withdrawn from the other side of the membrane wall. The aeration/backwash device (16) adapted to at least partially surround a portion of said membrane module (5) and including a communication chamber (17) having spaced through-openings (18, 19) in fluid communication with the chamber (17) and the membrane module (5). In use, gas is supplied to the chamber (17) and communicated to the membrane module (5) through the through-openings (18, 19) to aerate the membranes within the membrane module and liquid backwash is withdrawn from and/or fed into the membrane module (5) through the throughopenings into the chamber (17).
640 Citations
33 Claims
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1. An aeration/backwash device configured for use with a membrane filtration module comprising one or more membranes and opposing potted ends, comprising:
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a communication chamber including a closed internal volume defined by an inner wall, an outer wall, an upper wall coupling the inner wall to the outer wall, and a lower wall coupling the inner wall to the outer wall, the communication chamber at least partially surrounding a circumference of the membrane filtration module, the inner wall having upper through-openings and lower through-openings vertically spaced apart from the upper through-openings, the upper and lower through-openings spaced circumferentially about the inner wall, each through-opening having a longitudinal axis substantially perpendicular to the one or more membranes; a source of gas in fluid communication with the internal volume of the communication chamber; and a source of backwash liquid in fluid communication with the internal volume of the communication chamber, wherein the source of gas and the source of backwash liquid share a common inlet to the internal volume of the communication chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A porous membrane filtration module comprising:
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an upper and lower header vertically spaced from each other; one or more membranes having a permeable wall and an upper and lower end extending longitudinally between the upper and lower headers, into which the ends of the one or more membranes are potted, wherein at least one of the upper or lower ends of the membranes is in fluid communication with the upper or lower header, and the permeable wall is configured to allow feed containing contaminant matter to be applied to one side of the wall and to allow filtrate to be withdrawn from the other side of the wall; at least one filtrate collection chamber in fluid communication with at least one of the upper and lower header; and an aeration/backwash device comprising; a communication chamber including a closed internal volume defined by an inner wall, an outer wall, an upper wall coupling the inner wall to the outer wall, and a lower wall coupling the inner wall to the outer wall, the communication chamber at least partially surrounding a circumference of the membrane filtration module, the inner wall having upper through-openings and lower through-openings vertically spaced apart from the upper through-openings, the upper and lower through-openings spaced circumferentially about the inner wall, each through-opening having a longitudinal axis substantially perpendicular to the one or more membranes; a source of gas in fluid communication with the internal volume of the communication chamber; and a source of backwash liquid in fluid communication with the internal volume of the communication chamber, wherein the source of gas and the source of backwash liquid share a common inlet to the internal volume of the communication chamber. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A membrane filtration system comprising:
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at least one membrane filtration module comprising one or more membranes and opposing potted ends; a feed tank in fluid communication with the at least one membrane filtration module; at least one filtrate manifold in fluid communication with the at least one membrane filtration module and a source of filtrate; at least one aeration/backwash device comprising; a communication chamber including a closed internal volume defined by an inner wall, an outer wall, an upper wall coupling the inner wall to the outer wall, and a lower wall coupling the inner wall to the outer wall, the communication chamber at least partially surrounding a circumference of the membrane filtration module, the inner wall having upper through-openings and lower through-openings vertically spaced apart from the upper through-openings, the upper and lower through-openings spaced circumferentially about the inner wall, each through-opening having a longitudinal axis substantially perpendicular to the one or more membranes; and a source of gas in fluid communication with the internal volume of the communication chamber; at least one aeration/backwash manifold in fluid communication with the aeration/backwash device; and a source of backwash liquid in fluid communication with the aeration/backwash manifold, wherein the source of gas and the source of backwash liquid share a common inlet to the internal volume of the communication chamber. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification