Abstract: A process and apparatus are provided for treating sulfur-containing waste, resulting in recovered pure sulfur and a sulfur-free ash for landfilling. In regards to a process, a sulfur-containing waste is heated in a receptacle at between 120 and 160° C. to obtain a mixture including raw molten sulfur. The process optionally separates solids, by rough screening, from the mixture and transfers the mixture, following optional screening, to a separating reactor heated at between 450 and 500° C. to create sulfur vapor and sulfur-free solid phase. The process transfers the sulfur vapor to a condenser cooled to between 120 and 140° C. to obtain molten sulfur and transfers the solid phase to a cooling conveyor, with the solid phase being collected as ash for landfilling. The process further removes gases from the condenser with an off-gas cleaner and collects from the condenser essentially pure sulfur.

Abstract: The invention provides a process for stabilizing waste by landfilling, including mixing the waste with ash after burning oil shale, whereby safely stabilizing inorganic or organic waste by embedding it in a hardened matter exhibiting a high compression strength.

Abstract: The invention provides a process for stabilizing waste by landfilling, including mixing the waste with ash after burning oil shale, whereby safely stabilizing inorganic or organic waste by embedding it in a hardened matter exhibiting a high compression strength.