1
Robert A Elefritz, Wenjun Liu: Wastewater treatment system and method. Siemens Water Technologies, November 25, 2008: US07455765 (39 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 ...


2
Robert A Elefritz Jr, James Holland Scott III: Continuous membrane filtration and solids reduction. Siemens Water Technologies, August 4, 2009: US07569148 (11 worldwide citation)

A method and system of treating wastewater that can provide operating flexibility is disclosed. The system is operated with a sequencing batch reactor, which is typically cycling to any of fill, react, settle, decant, and idle stages, to treat the wastewater. The system can further utilize a membran ...


3
Robert A Elefritz Jr: Novel method for removal of sodium chloride from phosphazene rubber crumb swollen in water. The Firestone Tire & Rubber Company, May 12, 1981: US04267311 (7 worldwide citation)

A procedure is disclosed for the removal of alkali metal halide from phosphazene rubber crumb swollen in water. The crumb is pressed whereby a large proportion of the alkali halide is discharged from the crumb.


4
Robert A Elefritz Jr, Dennis J Barnes: Process to enhance phosphorus removal for activated sludge wastewater treatment systems. Siemens Water Technologies Holding, March 18, 2008: US07344643 (2 worldwide citation)

Contaminated wastewaters comprising biochemical oxygen demand (BOD), nitrogen and phosphorus are treated by an activated sludge process. The process utilizes an activated sludge tank, a solid-liquid separator, and a bioreactor to significantly reduce, or eliminate, waste activated sludge (WAS) withi ...


5
Robert A Elefritz Jr, James Holland Scott III: Sequencing batch reactor with continuous membrane filtration and solids reduction. Siemens Water Technologies, April 26, 2011: US07931808 (1 worldwide citation)

A method and system of treating wastewater that can provide operating flexibility is disclosed. The system is operated with a sequencing batch reactor, which is typically cycling to any of fill, react, settle, decant, and idle stages, to treat the wastewater. The system can further utilize a membran ...


6
Robert A Elefritz, William M Cole, Charles R Johnson: Process for preparing and purifying alkoxyphosphazene polymer. The Firestone Tire & Rubber Company, Frank J Troy Sr, September 2, 1986: US04609724 (1 worldwide citation)

Alkoxyphosphazene polymer is prepared in a homogeneous system by admixing chloropolymer dissolved in cyclohexane or a mix of cyclohexane and C.sub.5 -C.sub.7 alkane with alkali metal alkoxide dissolved in tetrahydrofuran, reacting, desalting the resulting reaction solution and concentrating by a fir ...


7
Robert A Elefritz, Wenjun Liu: Wastewater treatment system and method. USFilter Wastewater Group, Lowrie Lando & Anastasi, July 26, 2007: US20070170112-A1

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 ...


8
Robert A Elefritz, Dennis J Barnes: Process to enhance phosphorus removal for activated sludge wastewater treatment systems. USFilter Corporation, Michael Best & Friedrich, January 4, 2007: US20070000836-A1

Contaminated wastewaters comprising biochemical oxygen demand (BOD), nitrogen and phosphorus are treated by an activated sludge process. The process utilizes an activated sludge tank, a solid-liquid separator, and a bioreactor to significantly reduce, or eliminate, waste activated sludge (WAS) withi ...


9
Robert A Elefritz, James Holland Scott: Sequencing batch reactor with continuous membrane filtration and solids reduction. Siemens Water Technologies, Lowrie Lando & Anastasi, U0105, February 28, 2008: US20080047895-A1

A method and system of treating wastewater that can provide operating flexibility is disclosed. The system is operated with a sequencing batch reactor, which is typically cycling to any of fill, react, settle, decant, and idle stages, to treat the wastewater. The system can further utilize a membran ...


10
Robert A Elefritz, Wenjun Liu: Wastewater treatment system and method. Siemens Water Technologies, Lowrie Lando & Anastasi, U0105, April 9, 2009: US20090090670-A1

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 ...



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