Liquid purification or separation – With gas-liquid surface contact means – With separator
Reexamination Certificate
2007-02-20
2007-02-20
Barry, Chester T. (Department: 1724)
Liquid purification or separation
With gas-liquid surface contact means
With separator
C210S150000, C210S220000, C210S615000
Reexamination Certificate
active
11439318
ABSTRACT:
A membrane filtration system comprising one or more submerged ultrafiltration or microfiltration membrane assemblies at ambient pressure, each membrane assembly positioned 100–240 mm from a nearest wall, baffle, or adjacent membrane assembly and no more than 1 meter above a floor and at least 150 mm below the liquid level. Mixed liquor is discharged underneath each membrane assembly to create a vertical flow velocity in a range of 1–8 mm/second along an entire length of the membrane assembly. In a sequenced batch reactor system, a coarse bubble air diffuser for scouring each membrane assembly is supplied with air only during the backwash cycle of the filtration system and not during the filtration cycle. In a membrane bioreactor system, the biological treatment section is physically separated from the filtration section and fine bubble air diffusion is used in the biological treatment section.
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Byrne Roger J.
Dimitriou Michael A.
George Kenneth P.
Koch, III John E.
Krall Joseph G.
Barry Chester T.
ITT Manufacturing Enterprises Inc.
RatnerPrestia
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