Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2004-08-27
2009-02-03
Barry, Chester T (Department: 1797)
Liquid purification or separation
Processes
Treatment by living organism
C210S620000, C210S748080
Reexamination Certificate
active
07485231
ABSTRACT:
The present invention relates to an activated sludge process and apparatus for effectively removing organic matters, nutrient salts, particulates, etc. dissolved in sewage/waste water by operating activated sludge process of a high biomass concentration combined with a down-flow solid-liquid separation process utilizing a float-concentrated sludge blanket layer. The present invention provides a process for biologically treating sewage/waste water using activated sludge, comprising the steps of (a) floating a sludge by having micro bubbles rise to form a float-concentrated sludge blanket layer and (b) down-flowing mixed liquor, including activated sludge and solids, into the sludge blanket layer, thereby resulting in a solid-liquid separation and an apparatus for operating the process.
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Choi Young Gyun
Kim Hyung Soo
Park Yong Hyo
Yeom Ik Tai
Barry Chester T
Dorsey & Whitney LLP
GS Engineering & Construction Corp.
SBF Inc.
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