Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2006-10-25
2010-11-16
Barry, Chester T (Department: 1797)
Liquid purification or separation
Processes
Treatment by living organism
Reexamination Certificate
active
07833415
ABSTRACT:
An improved process for sludge treatment includes anaerobic digestion followed by post-mesophilic aerobic and/or anoxic digestion. The first anaerobic step may be performed under either mesophilic or thermophilic conditions. The subsequent aerobic/anoxic digestion may be performed using either simultaneous, sequential or pulsed aerobic and anoxic conditions. An apparatus for performing the improved sludge treatment may be one digester for performing the anaerobic followed by aerobic/anoxic digestion. Alternatively, the system for performing the improved sludge treatment techniques may be at least two digest reactors.
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Bailey, Jr. Walter F.
Daigger Glen T.
Murthy Sudhir N.
Novak John T.
Peot Christopher
Barry Chester T
D.C. Water & Sewer Authority
Dickstein & Shapiro LLP
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