Municipal waste briquetting system and method of filling land
AssigneeEcosystems Projects, LLC
InventorMauro Grillenzoni
Life of this patent
Estimating the term…
Abstract
Mechanically and biologically stable briquettes and pellets are obtained from either municipal solid waste (MSW), Refuse Derived Fuel (RDF) or municipal sewage sludge and their combination for purposes of disposing said briquettes and pellets as fuel in waste-to-energy processes such as the one described herein or to form geometric aggregates with such briquettes for their disposal at landfill sites. The use of binding material is not required whereas fuel additives such as crushed coal and petroleum residues may be added to enhance fuel performance but are not needed to improve waste processing or product stability and mechanical properties.
Claims10
An aseptic briquette having a density of about 1,000 to 3,000 lb/yd3, a moisture content of less than approximately 10% by weight, and being biologically inert, comprising:
- at least one component selected from the group consisting of sewage sludge solids, municipal solid waste and refuse derived fuel.
An aseptic briquette having a density of about 500 to 5.000 lb/yd3, a moisture content of less than approximately 10% by weight, and being biologically and chemically inert under conditions encountered in a lanfill for a period of no less than about 1 year and, comprising:
- at least one component selected from the group consisting of sewage sludge solids, municipal solid waste and refuse derived fuel.
An aseptic briquette having a density of about 2,000 lb/yd3 to about 3,000 lb/yd3, a moisture content of less than about 7%. compressive strength ranging from about 5.000 psi to about 15.000 psi, containing less than about 0.3% by weight metals;
- able to be stored under average daily temperate zone conditions for a period of at least about 5 years and comprising at least one component selected from the group consisting to sewage sludge solids, municipal solid waste and refuse derived fuel.
An aseptic briquette having a density of about 500 lb/yd3 to about 5,000 lb/yd3, compressive strength ranging from about 500 psi to about 15.000 psi and containing less train about 0.3% by weight metals and moisture content of less than about 5% by weight of said briquette and comprising:
- a mixture of refuse derived fuel and at least one additional component selected from the group consisting of sewage sludge solids and municipal solid waste.
A method for producing a biologically inert or aseptic briquette comprising:
- providing a waste material stream comprising one or more materials selected from the group consisting of municipal solid waste, refuse derived fuel, automobile tires, and municipal sewage sludge;
- processing said waste material stream as required to produce fluff of at least 95% by weight particle size of no greater than 4 inches in dimension;
- employing a rotating kiln, heated by a methane or waste gas burner to produce a waste intermediate with a residual moisture content of about 10%, and also to remove ferrous and non-ferrous metal particles and inert materials and
- employing a twin screw extrusion or briquetting machine capable of executing an extrusion operation further reducing a moisture content of a processed waste stream to about 5% while maintaining an extrudate temperature between 250 and 280° F., to produce a biologically inert or aseptic briquette.
Dependencies are inferred from the claim text.