Sam W. Maphis
Engineering at Arapahoe Ave, Boulder, CO
License number
Louisiana PE.0022958
Issued Date
Nov 17, 1987
Expiration Date
Mar 31, 2008
Category
Civil Engineer
Type
Civil Engineer
Address
Address
337 Arapahoe Ave APT 104, Boulder, CO 80302
Professional information
Subsurface Waste Disposal System
US Patent:
4448690, 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.