Continuously Variable Aeration
AssigneeU.S. Filter Wastewater Group, Inc.
InventorsFufang Zha, Warren Thomas Johnson, Thomas William Beck, Roger William Phelps, Etienne Ulysse Brois
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Abstract
A method of controlling fouling in a membrane filtration system (5) of the type where gas is used to clean or scour the membranes (6) wherein the method includes supplying the gas to the system with a continuously variable flow rate. A continuously variable valve arrangement (17) is also disclosed.
Claims31
A method of controlling fouling in a membrane filtration system having at least one membrane, comprising the steps of:
- supplying a gas to the system, wherein said gas is supplied with a continuously variable flow rate;
- and
- scouring said at least one membrane with said gas.
A membrane filtration system including comprising:
- one or more membranes for removing undesirable substances;
- and
- a source of gas for providing a gas flow to form bubbles which scour the surfaces of the membrane, wherein said source of gas provides said gas flow at a continuously variable flow rate.
A flow control device for use in the control of the flow of aerating gas in a membrane filtration system, comprising:
- a housing having an inlet port and one or more outlet ports;
- and
- a movable valve member for providing a continuously variable flow from said inlet port to said one or more outlet ports.
Dependencies are inferred from the claim text.