Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Reexamination Certificate
2005-09-27
2005-09-27
Lawrence, Frank M. (Department: 1724)
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
C210S754000, C210S103000, C210S143000, C210S199000
Reexamination Certificate
active
06949196
ABSTRACT:
The invention is directed to methods, apparatuses, and systems for treatment of a liquid flow comprising addition of a chemical treatment at at least two locations along a side stream of a main flow of said liquid, in which the dosing by such additions is sufficient to treat the entire main flow upon return of the side stream to the main flow. Algorithms are utilized to control the additions at the locations of addition of chemical treatments. In a typical embodiment, one chemical addition is principally proportional to the flow rate of the liquid flow, and the other chemical addition is principally adjusted based on signals from a primary measuring device that measures a parameter in the flow after one or both chemical additions. The addition of chlorine dioxide as the chemical treatment, to disinfect wastewater, is discussed.
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Francis David
Schmitz Wilfried J.
FKOS, LLC
Lawrence Frank M.
Morrison & Foerster / LLP
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