Sam W Maphis

US Patent:

44486901, May 15, 1984

Filed:

Sep 14, 1981

Appl. No.:

6/301970

Inventors:

Sam W. Maphis - Boulder CO

Assignee:

Genstar Waste Transfer, Inc. - San Mateo CA

International Classification:

C02F 304
B09B 100

US Classification:

210609

Abstract:

A system for utilizing and disposing of sludge and other wastes employs an artificially created perched bed and a subsurface injector system that applies such wastes in a liquid or semi-liquid state to an aerobic portion of the bed. The solids from the waste mixture are suspended in the bed while the liquids percolate through the bed to an underdrain system for collection, monitoring, further treatment, ultimate reuse, or direct discharge. The system provides closed loop disposal of the waste stream in a completely controlled environment without impact to the local environmental system. The bed's selected media can be changed into a beneficial by-product--top soil--through the addition of the waste material. Subsurface injection may be accomplished by moving an injector sweep either by a vehicle supported on the artificial bed or by a movable superstructure. Repeated applications of sludge or waste may be made to the bed without plugging due to the disruptive action of the injector sweep on the bed material.