Solid wastes generated by process industries usually include chemical residues, precipitated sludge of various kinds, spent catalysts and various other waste products resulting from the specific production cycle. Treatment technologies vary from incineration to composting, while a partial recovery is usually possible for heavy metals. A significant effort is presently under way at the R&D centres to improve the recovery and reuse of solid wastes. At Energeco we can conduct a detailed appraisal of the existing or expected waste characteristics and propose the most suitable treatment, consistently with the latest international environmental regulations, developing the relevant process and detailed design, as well as supervising implementation up to the plant commissioning phase.