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Class Information
Number: 210/743
Name: Liquid purification or separation > Processes > Including controlling process in response to a sensed condition > Ph sensing
Description: Process in which the hydrogen (or hydronium) ion concentration is measured and used as a basis for response by the actuating means.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7404905 |
Water treatment system, apparatus and method |
Jul. 29, 2008 |
| 7374694 |
Method for remineralizing raw water |
May. 20, 2008 |
| 7326352 |
Water treatment system |
Feb. 5, 2008 |
| 7326340 |
System for controlling sulfide generation |
Feb. 5, 2008 |
| 7300586 |
pH stable activated carbon |
Nov. 27, 2007 |
| 7294276 |
Process for preparing fluoropolymer dispersions |
Nov. 13, 2007 |
| 7285207 |
Methods and apparatus for reducing nitrate demands in the reduction of dissolved and/or atmospheric sulfides in wastewater |
Oct. 23, 2007 |
| 7273561 |
Method for determining the chemical dosage required to reduce sulfides in wastewater to acceptable levels |
Sep. 25, 2007 |
| 7261821 |
Process for treating an aqueous system with chlorine dioxide |
Aug. 28, 2007 |
| 7208117 |
Automated process for inhibiting corrosion in an inactive boiler containing an aqueous system |
Apr. 24, 2007 |
| 7169297 |
pH adjuster-based system for treating liquids |
Jan. 30, 2007 |
| 7160442 |
Apparatus for reduction of biological wasted sludge |
Jan. 9, 2007 |
| 7157008 |
Apparatus and process for water conditioning |
Jan. 2, 2007 |
| 7153473 |
Hemostatic system and components for extracorporeal circuit |
Dec. 26, 2006 |
| 7153437 |
Controlling corrosion in process water systems |
Dec. 26, 2006 |
| 7135118 |
Method for treatment against corrosion and depositions in domestic supply water stallations |
Nov. 14, 2006 |
| 7087172 |
Methods for reducing nitrate demands in the reduction of dissolved and/or atmospheric sulfides in wastewater |
Aug. 8, 2006 |
| 7060189 |
Method and apparatus for recycling wash chemicals |
Jun. 13, 2006 |
| 7052599 |
Method and apparatus for reuse of abrasive fluid used in the manufacture of semiconductors |
May. 30, 2006 |
| 6955765 |
Recycled irrigation water treatment system |
Oct. 18, 2005 |
| 6932910 |
Method and apparatus for recycling wash chemicals used in powder coating |
Aug. 23, 2005 |
| 6846421 |
Filtering method and filter chamber sealing arrangement |
Jan. 25, 2005 |
| 6841078 |
PH reduction system and method for concrete plant discharge |
Jan. 11, 2005 |
| 6797179 |
Method for removing dissolved metals from wastewater by electrocoagulation |
Sep. 28, 2004 |
| 6773600 |
Use of a clathrate modifier, to promote passage of proteins during nanofiltration |
Aug. 10, 2004 |
| 6767472 |
Catalytic fixed bed reactor systems for the destruction of contaminants in water by hydrogen peroxide and ozone |
Jul. 27, 2004 |
| 6746609 |
Cooling tower water treatment |
Jun. 8, 2004 |
| 6733471 |
Hemostatic system and components for extracorporeal circuit |
May. 11, 2004 |
| 6692641 |
Algal and nutrient control method for a body of water |
Feb. 17, 2004 |
| 6652752 |
Biodegradation of oil sludge |
Nov. 25, 2003 |
| 6645385 |
System and method for removal of fluoride from wastewater using single fluoride sensing electrode |
Nov. 11, 2003 |
| 6623647 |
Methods of optimized control of multiple oxidizer feedstreams |
Sep. 23, 2003 |
| 6589429 |
Method of treating industrial wastewater |
Jul. 8, 2003 |
| 6569334 |
METHOD OF HIGH-CONCENTRATION CULTURE OF NITRIFYING BACTERIA OR DENITRIFYING BACTERIA CONTAINED IN ACTIVATED SLUDGE, CULTURE PROMOTER TO BE USED IN HIGH-CONCENTRATION CULTURE METHOD OF NITRIFYI |
May. 27, 2003 |
| 6569336 |
Method, device and use of said method for biological elimination of metal elements present in an ionized state in water |
May. 27, 2003 |
| 6533942 |
Cooling tower water cleaning system |
Mar. 18, 2003 |
| 6482325 |
Apparatus and process for separation and recovery of liquid and slurry abrasives used for polishing |
Nov. 19, 2002 |
| 6423234 |
Air and water purification using continuous breakpoint halogenation |
Jul. 23, 2002 |
| 6409926 |
Air and water purification using continuous breakpoint halogenation and peroxygenation |
Jun. 25, 2002 |
| 6372146 |
Method of treating agricultural lagoons in confined animal feeding operations |
Apr. 16, 2002 |
| 6368511 |
Conditioning method for dehydrating clarification sludge |
Apr. 9, 2002 |
| 6334957 |
Method for reduction of flow resistance in pipes and ducts |
Jan. 1, 2002 |
| 6325941 |
Method of controlling the fatty acid content of cooking fats or cooking oils |
Dec. 4, 2001 |
| 6303037 |
Reverse osmosis process and equipment |
Oct. 16, 2001 |
| 6270677 |
Alkaline effluent solution treating process |
Aug. 7, 2001 |
| 6190564 |
Two-stage separation process |
Feb. 20, 2001 |
| 6149819 |
Air and water purification using continuous breakpoint halogenation and peroxygenation |
Nov. 21, 2000 |
| 6143184 |
Air and water purification using continuous breakpoint halogenation |
Nov. 7, 2000 |
| 6143532 |
Process for recovering carboxylic acids from a fermentation broth |
Nov. 7, 2000 |
| 6136203 |
System and method for photocatalytic treatment of contaminated media |
Oct. 24, 2000 |
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