NOVELTY - A waste disposal method for forming landfill material involves: processing stream having one of municipal solid waste, refuse derived fuel, automobile tires or municipal sewage sludge to form fluff (at least 95 wt.%) with particle size of at most4 inches; drying to moisture content of 5 - 20 wt.%; and compressing and extruding to obtain extrudate with approximately 1 - 10 wt.% moisture, initial temperature of 250 - 280degreesF and final density of 1000 - 3000 lb/y3.    USE - As waste disposal method for forming landfill material e.g. briquette useful as alternative fuel source in the production of energy (claimed) and in power generation processes.    ADVANTAGE - The extrudate has a final density of 1700 - 2700 (preferably 1300 - 2000 or 2000 - 2400) pounds/yd3; and a residual moisture content of at most 6 (preferably at most 5)%. The briquette formed has a density of 500 - 5000 (preferably 1000 - 3000, especially 2000 - 2400 or 2000 - 2750) lb/yd3 and a moisture content of less than approximately 10 (preferably less than 7) wt.%; is biologically and chemically inert under conditions encountered in a landfill for not less than 3 (preferably not less than 1) years. The briquette is storable under average daily temperate zone conditions for a period of 1 (preferably 5) years without losing a mass percentage greater than 5 (preferably greater than 2)% to decomposition processes; and has moisture content of approximately 5%. The briquette has compressive strength of 5000 - 15000 psi; is volumetrically compact; is dimensionally stable; is stable after sustained exposure to precipitation and rainwater; does not emit detectable levels of offensive odors; does not produce gaseous by-products of fermentation and decomposition under conditions encountered in a landfill; and can be transported without unacceptable decomposition. The land filled waste does not generate waste odors or attract birds, vermin and other pests thus reducing environmental and aesthetic impacts of landfill waste disposal upon communities in close proximity to landfills.    DETAILED DESCRIPTION - A waste disposal method for forming landfill material involves: processing waste material stream comprising at least one of municipal solid waste, refuse derived fuel, automobile tires or municipal sewage sludge to produce fluff (at least 95 wt.%) having particle size of at most4 inches in dimension; drying the fluff to moisture content of 5 - 20 wt.%; compressing and extruding the fluff to obtain extrudate having approximately 1 - 10 wt.% moisture, initial temperature of 250 - 280degreesF and final density of 1000 - 3000 lb/y3.    An INDEPENDENT CLAIM is included for producing (P1) energy from waste involving: processing a stream of municipal solid waste and sewage solids into aseptic, biologically inert briquettes having a density of 1000 - 3000 lb/yd3 and a moisture content of at most8%; storing the briquettes in a storage facility; and withdrawing the briquettes from the storage facility for combustion in a power generating plant.