US PATENT SUBCLASS 210 / 628
.~.~.~.~.~.~ Utilizing mechanical aeration means

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}
626  DF  .~.~.~.~.~ To mainstream oxygenation (e.g., activated sludge, etc.) {2}
628.~.~.~.~.~.~ Utilizing mechanical aeration means

DEFINITION

Classification: 210/628

Utilizing mechanical aeration means (e.g., stirring):

(under subclass 626) Process wherein the oxygen is introduced into the liquid by disturging or agitating the liquid to more effectively expose its surface to the atmosphere.

(1) Note. This subclass provides for processes other than diffusing air under the surface of the liquid and includes methods of stirring the surface, pouring or squirting liquid into the air, among others, to increase solution of air into the surface of the liquid.

(2) Note. A process utilizing a rotating surface such as a rotating contactor, disc, brush, drum, cylinder, etc., which supports the living organisms, and which obviously circulates and stirs the liquid, will not ordinarily be placed in this subclass, but will be provided for in subclass 619.

SEE OR SEARCH THIS CLASS, SUBCLASS:

619, for a process utilizing a rotating contact surface which may also stir the liquid.

926, for a collection of art disclosing the use of an oxidation ditch, sometimes called a carousel.