1
Thomas William Beck, Humphrey John Jardine Drummond, Ian Andrew Maxwell, Warren Thomas Johnson, Brett Kensett Smith: Filtration monitoring and control system. USF Filtration and Separations Group, Knobbe Martens Olson & Bear, June 20, 2000: US06077435 (108 worldwide citation)

A method and apparatus for determining the fouling effect of a feedstream on a filter having known characteristics disclosed. The method comprises passing the feedstream through a filter (5) having known characteristics; determining the change in resistance to flow of the feedstream across the filte ...


2
Thomas William Beck, Humphrey John Jardine Drummond, Matthew Brian Lee, Clint Virgil Kopp, Warren Thomas Johnson: Cleaning of hollow fibre membranes. USF Filtration & Separations Group, Knobbe Martens Olson & Bear, December 12, 2000: US06159373 (66 worldwide citation)

A method and apparatus for recovering fine solids from a liquid feed suspension is disclosed. The apparatus has an operating cycle including a concentration part of the cycle in which solids present in the feed suspension are concentrated and a backwash part of the cycle in which supply of feed susp ...


3
Warren Thomas Johnson, Peter Rogers: Membrane filtration system. U S Filter Wastewater Group, Knobbe Martens Olson & Bear, March 29, 2005: US06872305 (55 worldwide citation)

A method and apparatus for reducing volume of feed liquid required in a porous membrane filtration system having a number of porous membranes (6) submersed in a volume of feed liquid to be filtered is provided, the method comprising the step of providing filler elements (9) within said volume of fee ...


4
Warren Thomas Johnson, Gary William Stollery, Bruce Gregory Biltoft, David John Cox, Robert James McMahon, David Wood, Leon Keith Ernst: Membrane filtration manifold system. Siemens Water Technologies, September 4, 2007: US07264716 (54 worldwide citation)

A membrane filtration manifold for connecting a filter submodule including one or more elongate bundles of semipermeable polymeric fibers is provided. The manifold includes a housing and connecting collar connected with said housing. The collar is adapted to receive and locate the submodule, where t ...


5
Thomas William Beck, Warren Thomas Johnson: Methods of minimizing the effect of integrity loss in hollow fibre membrane modules. U S Filter Wastewater Group, January 9, 2007: US07160463 (52 worldwide citation)

A method and apparatus for reducing the effect of integrity loss in a hollow fiber membrane module, said module including a plurality of hollow fiber membranes (5), at least one end of the fiber membranes (5) being supported in a pot (6), the method including the step of increasing flow resistance o ...


6
Warren Thomas Johnson, Thomas William Beck: High solids module. U S Filter Wastewater Group, March 28, 2006: US07018533 (48 worldwide citation)

A method of cleaning a membrane filtration module is disclosed. The module comprises at least one or more longitudinally extending membranes located in a feed-containing vessel. The membranes have a permeable wall which is subjected to a filtration operation wherein feed containing contaminant matte ...


7
Thomas William Beck, Warren Thomas Johnson: Methods of minimising the effect of integrity loss in hollow fibre membrane modules. Siemens Water Technologies, March 18, 2008: US07344645 (44 worldwide citation)

A method and apparatus for reducing the effect of integrity loss in a hollow fiber membrane module, said module including a plurality of hollow fiber membranes (5), at least one end of the fiber membranes (5) being supported in a pot (6), the method including the step of increasing flow resistance o ...


8
Robert James McMahon, David John Cox, Fufang Zha, Roger William Phelps, Warren Thomas Johnson, Sargon Barkho: Square membrane manifold system. Siemens Water Technologies, Lando & Anastasi, January 4, 2011: US07862719 (43 worldwide citation)

A membrane module (3) comprising a plurality of porous hollow membranes (8). The membranes (8) extend between and are fixed at each end in a header (5, 6). One header (6) has one or more of openings (12) formed therein. The openings (12) are in fluid communication with a source of gas and/or liquid ...


9
Warren Thomas Johnson, Bruce Gregory Biltoft, Dean Osman Cameron: Combination membrane/biolytic filtration. Siemens Water Technologies, May 4, 2010: US07708887 (37 worldwide citation)

Described herein are methods and systems for combination membrane/biolytic filtration. In one embodiment a filtration system is operated under suction. The arrangement includes a feed tan (5) having a smaller filtrate vessel (6) positioned therein. The region within, the feed tank (5) not occupied b ...


10
Warren Thomas Johnson: Backwash method. Siemens Water Technologies, May 10, 2011: US07938966 (34 worldwide citation)

A filtration arrangement including one or more membrane modules (5) positioned vertically within a feed tank (6), each membrane module (5) having one or more membranes positioned therein. An aeration hood (10) having an upper wall (11) and one or more downwardly extending side walls (12, 13) is conf ...