1
Mailvaganam Mahendran, Carlos Fernando F Rodrigues, Steven Kristian Pedersen: Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate. Zenon Environmental, Alfred D Lobo, June 17, 1997: US05639373 (155 worldwide citation)

A vertical skein of "fibers", opposed terminal portions of which are held in headers unconfined in a modular shell, is aerated with a gas-distribution means which produces a mass of bubbles serving the function of a scrub-brash for the outer surfaces of the fibers. The membrane device is surprisingl ...


2
Pierre L Cote, Bradley M Smith, Ake A Deutschmann, Carlos F F Rodrigues, Steven K Pedersen: Frameless array of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate. Zenon Environmental, Alfred D Lobo, September 28, 1993: US05248424 (153 worldwide citation)

A frameless array unconfined in a modular shell, proves to be a surprisingly effective membrane device for withdrawing permeate from a substrate, the flux through the membranes reaching an essentially constant relatively high value because of the critical deployment of fibers of the array as a skein ...


3
Wayne Jerald Henshaw, Mailvaganam Mahendran, Henry Behmann: Vertical cylindrical skein of hollow fiber membranes and method of maintaining clean fiber surfaces. Zenon Environmental, Alfred D Lobo, July 21, 1998: US05783083 (138 worldwide citation)

A gas-scrubbed vertical cylindrical skein of "fibers" has their opposed terminal portions held in headers unconfined in a modular shell, and aerated with a cleansing gas supplied by a gas-distribution means which produces a mass of bubbles serving the function of a scrub-brush for the outer surfaces ...


4
Steven Kristian Pedersen, Henry Behmann: System for maintaining a clean skein of hollow fibers while filtering suspended solids. Zenon Environmental, Alfred D Lobo, August 31, 1999: US05944997 (120 worldwide citation)

The outer surfaces of hollow fiber membranes in a skein, or a bank or cassette of stacked skeins, are kept essentially free of solids by maintaining a substantially uniform flow of a stream of coarse bubbles through each of plural orifices in an aerator disposed beneath the fibers. Aerators for skei ...


5
William V Collentro, Andrew W Collentro: Production of high purity water using reverse osmosis. Zenon Environmental, Andrew Alexander, June 16, 1998: US05766479 (112 worldwide citation)

A process for purifying water by removing dissolved materials therefrom, the process capable of producing purified water having a resistivity in the range of 2 to 10 megohm-cm. The process comprises providing a water feed stream to be purified and adjusting the pH of the water feed stream to a basic ...


6
William V Collentro, Andrew W Collentro: Purification of gases from water using reverse osmosis. Zenon Environmental, Andrew Alexander, September 23, 1997: US05670053 (111 worldwide citation)

A process for purifying water including removing cations, anions and carbon dioxide and/or ammonia from water feed stream to produce high purity water having a resistivity of greater than 1 megohm-era comprising the steps of providing a water feed stream to be purified, the stream containing cations ...


7
Mailvaganam Mahendran, Ake Adolf Deutschmann, Wayne Jerald Henshaw, Henry Behmann: Baffle for conversion of fine bubbles to coarse while filtering with a vertical skein of hollow fibers. Zenon Environmental, Alfred D Lobo, June 8, 1999: US05910250 (108 worldwide citation)

A filtration device is provided for withdrawing permeate essentially continuously from a multicomponent aqueous substrate containing growing microorganisms in a reservoir. A vertical skein of fiber is scrubbed with coarse bubbles which emanate from a conversion baffle positioned under the skein. The ...


8
Mailvaganam Mahendran, Kenneth Paul Goodboy, Luigi Fabbricino: Hollow fiber membrane and braided tubular support therefor. Zenon Environmental, Alfred D Lobo, March 12, 2002: US06354444 (108 worldwide citation)

An asymmetric membrane comprising a tubular polymer film in combination with a tubular braid on which the film is supported, requires the braid be macroporous and flexible, yet sufficiently strong to withstand continuous flexing, stretching and abrasion during use for microfiltration (MF) or ultrafi ...


9
Steven Kristian Pedersen, Henry Behmann: System for maintaining a clean skein of hollow fibers while filtering suspended solids. Zenon Environmental, Alfred D Lobo, February 27, 2001: US06193890 (106 worldwide citation)

The outer surfaces of hollow fiber membranes in a skein, or a bank or cassette of stacked skeins, are kept essentially free of solids by maintaining a substantially uniform flow of a stream of coarse bubbles through each of plural orifices in an aerator disposed beneath the fibers. Aerators for skei ...


10
Bradley M Smith, Ake A Deutschmann, Kenneth P Goodboy: In situ cleaning system for fouled membranes. Zenon Environmental, Alfred D Lobo, April 4, 1995: US05403479 (101 worldwide citation)

A method and cleaning system is disclosed for cleaning the outer surface of a fouled microfiltration (MF) or ultrafiltration (UF) semipermeable hollow fiber membrane after its initial stable transmembrane flux has been decreased to an unacceptably low level. The method is specifically applicable to ...



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