1
George R Whiteman: Methods for treatment of waste streams. Brinks Hofer Gilson & Lione, December 8, 1998: US05846425 (73 worldwide citation)

A method for treating wastewater is useful in treatment of biomass (sludge) resulting from wastewater treatment, particularly for biological sludges of aerobic, facultative and/or anaerobic origin. The invention relates fractionation of microorganisms and organic materials within the sludge by mecha ...


2
John P Nicholson, Jeffrey C Burnham: Method for treating wastewater sludge. N Viro Energy Systems, Barnes Kisselle Raisch Choate Whittemore & Hulbert, February 20, 1990: US04902431 (72 worldwide citation)

A method of decontaminating wastewater sludge to a level that meets or exceeds USEPA Process to Further Reduce Pathogens standards, wherein lime or kiln dust and/or other alkaline materials are mixed with wastewater sludge in sufficient quantity to raise the pH of the mixture to 12 and above for a p ...


3
Billy C Wolverton: Method for treating wastewater using microorganisms and vascular aquatic plants. The United States of America represented by the Administrator of the National Aeronautics and Space Administration, Joseph H Beumer, John R Manning, Leon D Wofford Jr, November 15, 1983: US04415450 (67 worldwide citation)

A method for treating wastewater comprising the steps of subjecting the wastewater to an anaerobic settling step for at least 6 hours and passing the liquid effluent from the anaerobic settling step through a filter cell in an upflow manner, wherein the effluent is subjected first to the action of a ...


4
Glen T Daigger, Edwin J Fleischer, Albert M Wollmann: Method for treating wastewater in a membrane bioreactor to produce a low phosphorus effluent. CH2M Hill, Swanson & Bratschun, September 20, 2005: US06946073 (66 worldwide citation)

Removal of biological nutrients from a wastewater yielding a low phosphorous (e.g., less than 0.25 mg/L) output includes providing a serial multistage bioreactor containing activated sludge having in hydraulic series an anaerobic zone and a downstream aerobic zone, with each zone having an upstream ...


5
Jeffrey J Chen: Biologically active reactor system and method for treating wastewater. Severn Trent Services Water Purification Solutions, D Ambrosio & Associates P L L C, April 4, 2006: US07022233 (53 worldwide citation)

A biologically active reactor system for the treatment of wastewater comprises one or more submerged denitrification reactors having coarse media particles and a fixed biological film comprising biologically anoxic active microorganisms. One or more submerged aerated filters are in fluid communicati ...


6
Dean O Cameron: Method for treating wastewater and solid organic waste. Dowmus, Dvorak and Traub, May 27, 1997: US05633163 (51 worldwide citation)

Organic waste disposal treatment apparatus includes a treatment chamber assembly in which a compost bed may be formed, an inlet to the treatment chamber assembly through which organic waste may be added to a compost bed in the treatment chamber assembly, ventilation means for promoting aerobic diges ...


7
Jeffrey C Burnham: Process to stabilize wastewater sludge. N Viro Energy Systems, Barnes Kisselle Raisch Choate Whittemore & Hulbert, January 4, 1994: US05275733 (47 worldwide citation)

A method for treating wastewater sludge so that a stability based upon achieving a significant microbial population, conductivity level and percent solids, is developed rapidly, is provided for indefinitely and is independent of climatic conditions. A dewatered sludge that has not been treated (i.e. ...


8
Edward J Jordan, Wenjun Liu: Method for treating wastewater. Siemens Water Technologies, May 25, 2010: US07722769 (43 worldwide citation)

This invention is directed to a wastewater treatment system having a fluidizable media carrying anoxic bacteria in a first treatment zone and a filter membrane positioned in a second treatment zone. A wastewater is contacted with the fluidizable media and further contacted with air and a filter memb ...


9
Jeffrey C Burnham: Method for treating wastewater sludge. N Viro Energy Systems, Barnes Kisselle Raisch Choate Whittemore & Hulbert, August 4, 1992: US05135664 (38 worldwide citation)

A method for treating wastewater sludge which comprises the steps of further treating the sludges after they have been mixed with alkaline materials and are still in a wet condition with carbon dioxide containing gases wherein the carbon dioxide is a significant constituent for a time sufficient to ...


10
Thomas H Probst: Method for wastewater treatment. Procorp Enterprises, Michael Best & Friedrich, January 19, 2010: US07648634 (36 worldwide citation)

A system and method for treating wastewater includes a treatment container for receiving and treating wastewater and a mixing/aeration system disposed in the treatment container. Wastewater is pumped under pressure from the treatment container through a solids/liquid separation system, preferably co ...