1
Heinz Joachim Muller: Modified membranes. Siemens Water Technologies, November 27, 2007: US07300022 (77 worldwide citation)

A porous polymeric membrane formed from a blend of a polymeric membrane forming material, such as polyvinylidene fluoride or polysulfone and a polymeric reactivity modifying agent adapted to modify the surface active properties of the porous polymeric membrane. The reactivity modifying agent is pref ...


2
Daniel Mullette, Heinz Joachim Muller: Poly(ethylene chlorotrifluoroethylene) membranes. Siemens Water Technologies, July 24, 2007: US07247238 (65 worldwide citation)

Porous polymeric membranes including Halar (poly (ethylene chlorotrifluoroethylene)) and related compounds and the methods of production thereof which avoid the use of toxic solvents. Preferred solvents, coating agents and pore forming agents are citric acid ethyl ester or glycerol triacetate. The m ...


3
Edward John Jordan, Robert Elefritz: Grease and scum removal in a filtration apparatus comprising a membrane bioreactor and a treatment vessel for digesting organic materials. Siemens Water Technologies, February 12, 2008: US07329344 (61 worldwide citation)

The invention relates to a membrane bioreactor process combined with an advanced biological sludge digestion process that provides significant improvements in sludge digestion by reducing the costs and resources required for disposing of digested sludge. The offline treatment vessel is used to solub ...


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
Edward John Jordan: Filtration apparatus comprising a membrane bioreactor and a treatment vessel for digesting organic materials. Siemens Water Technologies, June 17, 2008: US07387723 (48 worldwide citation)

The invention relates to a membrane bioreactor process combined with an advanced biological sludge digestion process that provides significant improvements in sludge digestion by reducing the costs and resources required for disposing of digested sludge. The offline treatment vessel is used to solub ...


6
Daniel Mullette, Heinz Joachim Muller: Poly(ethylene chlorotrifluoroethylene) membranes. Siemens Water Technologies, December 15, 2009: US07632439 (47 worldwide citation)

Porous polymeric membranes including HALARĀ® (poly(ethylene chlorotrifluoroethylene)) and related compounds and the methods of production thereof which avoid the use of toxic solvents. Preferred solvents, coating agents and pore forming agents are citric acid ethyl ester or glycerol triacetate. The m ...


7
Fufang Zha, Gary C Ganzi, Thomas W Beck: Submerged cross-flow filtration. Siemens Water Technologies, September 22, 2009: US07591950 (47 worldwide citation)

A membrane filtration module having a plurality of permeable, hollow membranes is disclosed. In use, a pressure differential is applied across the walls of the permeable, hollow membranes when immersed in a liquid suspension containing suspended solids. Some of the liquid suspension passes through t ...


8
Robert A Elefritz, Wenjun Liu: Wastewater treatment system and method. Siemens Water Technologies, November 25, 2008: US07455765 (45 worldwide citation)

The invention is directed to a wastewater treatment system having an anoxic biological treatment zone, an aerobic biological treatment zone and a separator. The concentration of oxygen in streams within the system is strategically managed for improved removal of nutrient from the wastewater. A sourc ...


9
Matthew J Kuzma: System for treating wastewater. Siemens Water Technologies, July 21, 2009: US07563363 (45 worldwide citation)

The invention is directed to a method an apparatus for treating wastewater. The wastewater treatment system includes an aeration system that cycles between biological multiple biological basins. The system also includes one or more membrane basins. A method of the invention includes controlling the ...


10
Huw Alexander Lazaredes: Aeration method. Siemens Water Technologies, April 22, 2008: US07361274 (44 worldwide citation)

A method and filtration module (5) for providing gas bubbles within an array of vertically disposed porous hollow membranes (6) to clean the outer surfaces of said membranes (6) when the array is immersed in a liquid by feeding (10) the gas bubbles into the array transversely of the vertical axis of ...