Method for applying a biodegradable protein foam to a substrate
AssigneeChubb National Foam, Inc.
InventorsEdward C. Norman, Louis R. DiMaio
Life of this patent
Estimating the term…
Abstract
A method and apparatus for covering substrates such as landfills, sewage, contaminated soil, sludge deposits, compost piles and the like. A protein based solution, preferably mixed from a foam concentrate, is mixed with air in a foam production nozzle and then spread to an approximately uniform thickness over the surface of the substrate. In an alternative embodiment the present invention also relates to a method for providing a foam covering to substrates such as buildings and other natural and artificial structures to protect such substrates from adverse environmental conditions such as polluted air or water, insects, extreme hot and cold temperatures and toxic vapors or substances.
Claims15
A method for covering a substrate selected from the group consisting of landfills, hazardous wastes, soil contaminated with hazardous wastes or vapors, sludge, sewage and compost piles, having one or more surfaces exposed to the environment, to provide a semipermanent, essentially biodegradable, barrier layer between said substrate and the environment, comprising the following steps in combination:
- providing an aqueous solution or dispersion mixed from a concentrate consisting essentially of the following ingredients with the approximate percentages given by weight:
- protein hydrolysate (concentrate) 35-70%, polyvalent metallic salt 1-2.5%, foam booster 3-7%., bactericide 0.1-0.2%, dispersant 10-14% and the balance water;
- mixing said solution or dispersion with one or more foam stabilizing agents;
- mixing the resulting solution or dispersion with air to produce a foam;
- and
- applying said foam to the exposed surface or surfaces of said substrate.
A method for covering the working face of a landfill or other storage facility for refuse optionally having a leachate reservoir, to provide an essentially biodegradable barrier layer between said working face and the environment comprising the following steps in combination:
- providing an aqueous solution or dispersion mixed from a concentrate consisting essentially of the following ingredients with the approximate percentages given by weight:
- protein hydrolysate (concentrate) 35-70%, polyvalent metallic salt 1-2.5%, foam booster 3-7%, bactericide 0.1-0.2%, dispersant 10-14% and the balance water;
- mixing said solution or dispersion with one or more foam stabilizing agents;
- mixing the resulting solution or dispersion with air to produce a foam;
- and
- applying said foam to said working face to a depth adequate to cover the refuse on said working face.
Dependencies are inferred from the claim text.