Abstract: The treatment of solid waste and sewage sludge with the recovery of natural resources comprising subjecting all or at least a portion of the sewage sludge to wet oxidation reaction to reduce the COD by an amount of at least 50% and preferably 50-85% and using the excess heat from the wet oxidation reaction to dry the solid waste and subjecting the combined solids from the wet oxidation reaction and the solid waste to pyrolysis under non-oxidizing conditions whereby the products from the pyrolysis reaction are readily separable into valuable constituents which are easily recovered.

Abstract: The destruction of developed or undeveloped photographic film in a manner which permits also the recovery of silver and organic components from the film material in which the film is subjected to wet oxidation at high temperature and high pressure in the presence of a wet oxidation catalyst and a silver complexing compound, and then subjecting the liquor from the wet oxidation step to processing to separate the solubilized silver which is freed from the film and to separate components derived from the film material in the liquor that remains.