US Patent No: 7,087,173
Number of patents in Portfolio can not be more than 2000
Inverted cavity aerator for membrane module
Stats
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Aug 8, 2006
Issued date -
May 10, 2004
filing date -
10/841,440
serial no -
In Force
status
Importance
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Abstract
An aerator for immersed filtering membranes has an aerator shell with openings for discharging bubbles from its upper surface and a shape capable of temporarily containing a volume of air in fluid communication with the openings. The shell is open to tank water below it and located so that discharged bubbles will rise through an assembly of the filtering membranes. The shell may be wholly or partially made of parts of the assemblies of filtering membranes. A supply of air is provided to the air space in the aerators alternating between a high flow rate and a low flow rate in short cycles of between about 10 seconds and 100 seconds. A filtration system has an inlet for adding substrate and an outlet for retentate are located so as to create a horizontal flow of substrate through the tank. Membrane assemblies are located within the horizontal flow of substrate. Aerators as described above are provided and operated as described above.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,639,373 Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate | 128 | 1995 | |
| 5,783,083 Vertical cylindrical skein of hollow fiber membranes and method of maintaining clean fiber surfaces | 119 | 1996 | |
| 6,042,677 Potted header for hollow fiber membranes and method for making it | 70 | 1999 | |
| RE37549 Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate | 63 | 1999 | |
| 6,193,890 System for maintaining a clean skein of hollow fibers while filtering suspended solids | 83 | 1999 | |
| 6,319,411 Method of maintaining clean vertical skeins of hollow fiber membranes and system therefor | 44 | 1999 | |
| 6,303,035 Immersed membrane filtration process | 45 | 1999 | |
| 6,245,239 Cyclic aeration system for submerged membrane modules | 61 | 2000 | |
| 6,325,928 Immersed membrane element and module | 60 | 2000 | |
| 6,294,039 Potted header for hollow fiber membranes | 54 | 2000 | |
| 6,620,319 Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes | 50 | 2001 | |
| 6,682,652 Apparatus for withdrawing permeate using an immersed vertical skein of hollow fiber membranes | 36 | 2002 | |
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| 5,248,424 Frameless array of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate | 139 | 1992 | |
| 5,366,625 Cartridge of hybrid unitary wafers of hollow fiber membranes and module containing a stack of post-potted cartridges | 30 | 1992 | |
| 5,403,479 In situ cleaning system for fouled membranes | 84 | 1993 | |
| 5,910,250 Baffle for conversion of fine bubbles to coarse while filtering with a vertical skein of hollow fibers | 87 | 1997 | |
| 5,944,997 System for maintaining a clean skein of hollow fibers while filtering suspended solids | 103 | 1998 | |
| 6,045,698 Method for cleaning a filtration installation of the type with immersed membranes | 61 | 1998 | |
| 6,214,231 System for operation of multiple membrane filtration assemblies | 60 | 1999 | |
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| 5,643,455 Concentration of solids in a suspension using hollow fibre membranes | 90 | 1995 | |
| 6,156,200 Gas-scrubbed hollow fiber membrane module | 87 | 1998 | |
| 6,555,005 Scouring method | 61 | 1999 | |
| 6,524,481 Apparatus and method for cleaning membrane filtration modules | 55 | 2001 | |
| 6,641,733 Apparatus and method for cleaning membrane filtration modules | 41 | 2002 | |
| 6,841,070 Apparatus and method for cleaning membrane filtration modules | 25 | 2004 | |
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| 4,886,601 Column filter using bundles of long fibers | 49 | 1989 | |
| 4,915,833 Column filter using bundles of long fibers | 11 | 1989 | |
| 5,209,852 Process for scrubbing porous hollow fiber membranes in hollow fiber membrane module | 79 | 1991 | |
| 5,151,191 Filtration process using hollow fiber membrane module | 61 | 1991 | |
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| 5,192,456 Apparatus for treating activated sludge and method of cleaning it | 96 | 1992 | |
| 5,451,317 Solid-liquid separator | 48 | 1994 | |
| 5,482,625 Filtration membrane module | 33 | 1994 | |
| 5,647,988 Method of back-washing submerged-type ceramic membrane separation apparatus | 60 | 1994 | |
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| 4,775,471 Hollow fiber filter device | 50 | 1986 | |
| 4,876,006 Hollow fiber filter device | 100 | 1988 | |
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| 4,605,500 Hollow-fiber filter module | 29 | 1985 | |
| 5,480,553 Hollow fiber membrane module | 85 | 1993 | |
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| 4,668,401 Hollow-fiber filter module and filtration method using the same | 19 | 1986 | |
| 6,325,938 Method of cleaning membrane assembly with detergent | 21 | 2000 | |
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| 6,284,135 Membrane filter apparatus with gas discharge cleaning means | 55 | 1998 | |
| 6,402,955 Method for operating a membrane filter having a gas discharge cleaning means | 42 | 2001 | |
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| 5,790,360 Power surge supression system with multi-level status annunciation circuitry | 7 | 1996 | |
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| 4,707,268 Hollow fiber potted microfilter | 18 | 1986 | |
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| 5,716,519 Apparatus for discharging fluid additives into a water treatment vessel | 9 | 1996 | |
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| 5,035,799 Filter assembly | 18 | 1989 | |
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| 4,414,113 Liquid purification using reverse osmosis hollow fibers | 63 | 1982 | |
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| 6,199,835 Throat and cone gas injector and gas distribution grid for slurry reactor (LAW646) | 3 | 1999 | |
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| 4,540,490 Apparatus for filtration of a suspension | 70 | 1983 | |
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| 4,647,377 Filter apparatus | 71 | 1984 | |
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| 4,756,875 Apparatus for filtering water containing radioactive substances in nuclear power plants | 55 | 1986 | |
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| 5,584,997 Separation module and bundle unit of hollow thread-type porous membrane elements and methods of producing same | 17 | 1994 | |
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| 5,141,031 Woven hollow fiber double weft tape with knitted selvedge | 24 | 1991 | |
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| 6,478,964 Floating fine-bubble aeration system | 8 | 2001 | |
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| 6,280,626 Membrane separator assembly and method of cleaning the assembly utilizing gas diffuser underneath the assembly | 59 | 1999 | |
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| 6,139,411 Disc sander | 8 | 1998 | |
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| 5,484,528 Filtration equipment for hollow fiber module | 41 | 1994 | |
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| 5,607,593 Installation for making water potable with submerged filtering membranes | 104 | 1994 | |
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| 5,133,862 Flexible membrane diffuser | 11 | 1991 | |
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| 5,932,099 Installation for biological water treatment for the production of drinkable water | 36 | 1997 | |
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| 5,989,428 Controlling wastewater treatment by monitoring oxygen utilization rates | 38 | 1997 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Feb 8, 2014 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 8, 2018 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |