US PATENT SUBCLASS 210 / 625
.~.~.~.~.~ Treating outside mainstream

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

600  DF  PROCESSES {14}
601  DF  .~ Treatment by living organism {13}
620  DF  .~.~ Aerobic treatment {3}
621  DF  .~.~.~ Recirculating to prior step {2}
623  DF  .~.~.~.~ Of sludge or separated solid {3}
625.~.~.~.~.~ Treating outside mainstream

DEFINITION

Classification: 210/625

Treating outside mainstream:

(under subclass 623) Process wherein the sediment being recirculated is treated after removal from the process stream and prior to reintroduction into the process stream.

SEE OR SEARCH THIS CLASS, SUBCLASS:

710+, for a process of treating separated solids in a precipitating method.