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US 4,379,050 AGranted
Granular fluid biofilter reversing
AssigneeThe United States of America as represented by the Secretary of the Army
InventorsW. John Hess, Morris C. Croker
Life of this patent
Estimating the term…
Abstract
A biological filter system has a bed of buoyant granules a portion of which xtends above the surface of the fluid. The bed is disposed above the effluent outlet. Distubutor and receiving means are provided by which the filter can be backwashed.
Claims29
A fluid filter system comprising
- a. a fluid-holding container;
- b. first means through which influent enters said container to be filtered;
- c. second means through which effluent exits said container;
- d. a fluid filter bed comprised of a mass of buoyant granules, said fluid filter bed being disposed above said second means;
- and
- e. fluid flow reversal means for periodically causing said influent to enter said container through said second means and said effluent to exit said container through said first means.
3 more elements
A fluid filter system comprising:
- a. a fluid-holding container;
- b. first means through which influent enters said container to be filtered;
- c. second means through which effluent exists said container;
- d. a fluid filter bed comprised of a mass of buoyant granules having bacteria growth therein, said fluid filter bed being disposed above said second means;
- and
- e. fluid flow reversal means for periodically causing said influent to enter said container through said second means and said effluent to exit said container through said first means thereby providing maximum bacteria growth within said mass of buoyant granules by strengthening bacteria growth adjacent the top of said fluid filter bed when fluid enters said container through said first means and strengthening said bacteria growth adjacent the bottom of said fluid filter bed when fluid enters said container through said second means.
3 more elements
Dependencies are inferred from the claim text.