Pre-coated refuse-coal filter for landfill refuse treatment

Claim 1

A method of using landfill refuse coated with an imp-roved sorptive coal-fines medium to provide a pre-coat pollutant-retarding and treatment filter media, at the point of origin of refuse pollutants the inter-face of the refuse with waters percolating therethrough, which includes the steps of: (a) determining the nature of the heterogeneous refuse to be placed in the landfill, (b) providing an improved sorptive-coal-fines filter-pre-coating medium having affinity for a wide spectrum of refuse pollutants as determined from step (a), (c) pulverizing, screening and improving the sorptive properties of the coal and producing therefrom improved sorptive coal particles in which the maximum particle size is that passing through a standard screen with a 200 mesh size, (d) forming a coal-in-water slurry from the finely sized sorptive coal particles with water, (e) adding the sorptive coal-in-water slurry to the landfill refuse and intimately mixing and coating the refuse with the said coal-in-water slurry, thereafter (f) depositing the coal-refuse mixture as a layered and compacted pre-coat pollutant-retarding and treatment-filter within the refuse landfill.

Claim 2

A method of using landfill refuse coated with an imp-roved sorptive coal-fines medium to provide a pre-coat pollutant-retarding and treatment filter media, at the point of origin of refuse pollutants the inter-face of the refuse with waters percolating therethrough, which includes the steps of: (a) determining the nature of the heterogeneous refuse to be placed in the landfill, (b) providing an improved sorptive-coal-fines filter-pre-coating medium having affinity for a wide spectrum of refuse pollutants as determined from step (a), (c) pulverizing, screening and improving the sorptive properties of the coal and producing therefrom improved sorptive coal particles in which the maximum particle size is that passing through a standard screen with a 200 mesh size, (d) forming a coal-in-water slurry from the finely sized sorptive coal particles with water, (e) adding the sorptive coal-in-water slurry to the landfill refuse and intimately mixing and coating the refuse with the said coal-in-water slurry, thereafter (f) depositing the coal-refuse mixture as a layered and compacted pre-coat pollutant-retarding and treatment-filter within the refuse landfill.

Claim 4

A method as claimed in Claims 1 or 2 including the step of washing the expanded and more porous coal particles, prior to coating the refuse therewith, with treatments and one or more solutions chosen from heat application under controlled conditions, steam, hot or cold water, distilled water, hydrochloroic acid, and sodium hydroxide.

Claim 5

A method as claimed in Claims 1 or 2 including the step of deodourizing the refuse, prior to depositing the refuse in the refuse landfill, by intimately mixing and coating the refuse with a coal-in-water slurry consisting of an improved finely pulverized and screened sorptive coal material and water mixed with agitation in a tumbling mixing device.

Claim 6

A method as claimed in Claims 3 or 4 including the step of preparing a pre-coat pollutant-retarding and treatment filter at the point of origin of refuse pollutants, prior to passage of the percolating waters therethrough, with a pre-coat filter mixture consisting of landfill refuse coated with an improved finely pulver-ized sorptive coal-in-water slurry mixture.

Claim 7

A method as claimed in Claims 4 or 5 including the step of providing tertiary treatment to potential leachate effluents, during the passage of the percolating waters through the landfill refuse, by contacting and treating such refuse percolating waters at the point of leachate origin with the refuse-water interface with a pre-coat filter comprising fill refuse coated with an improved pulverized sorptive-coal and-water mixture in slurry form.