Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2006-12-26
2006-12-26
Barry, Chester T. (Department: 1724)
Liquid purification or separation
Processes
Treatment by living organism
C210S624000, C210S625000, C210S195100, C210S196000, C210S197000
Reexamination Certificate
active
07153431
ABSTRACT:
A method and system for treating water or wastewater to remove both soluble BOD and suspended solids. The method entails a ballasted flocculation process where a flocculant and insoluble granular material is added to the water or wastewater to be treated causing solids in the water or wastewater to aggregate around the granular material to form ballasted floc particles. In a settling zone, ballasted floc particles form settled sludge and the settled sludge is separated from clarified effluent. At some point in the process, activated sludge, in the form of return activated sludge or mixed liquor, is mixed with the water or wastewater being subjected to the ballasted flocculation process. The addition of activated sludge enables the process to remove soluble BOD.
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Barry Chester T.
Coats & Bennett P.L.L.C.
I. Kruger Inc.
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