11 Steam generators using sewage sludge; Natural gas extracting and processing machines, namely, biogas fermentation reactors, namely, percolating fermenters and dry fermenters using sewage sludge; Biogas fermentation reactors, namely, percolating fermenters and dry fermenters used to generate thermal energy from sewage sludge from waste water clarifying installations being parts of waste purification installations; Bioreactor used to generate thermal energy from sewage sludge from waste purification installations; Alternative energy generation power plant installations using sewage sludge from waste purification for generating thermal energy, all being part of waste purification installations; Bioreactor for use in the treatment of sewage sludge waste being part of waste purification installations; Steam generating machines and installations generating energy using sewage sludge waste, all being part of waste purification installations; Heat generators used for producing thermal energy, in particular steam, through the processing of sewage sludge waste all being part of waste purification installations; Industrial sewage sludge waste treatment installations, namely, sewage sludge waste treatment septic tanks for the treatment of sewage of all kinds, all being part of waste purification installations; Machines used for the treatment of sewage sludge waste comprising sewage sludge waste comprising sewage sludge waste treatment tanks, septic tanks, clarification and thickening machines for use in treatment of liquids in the nature of sewage sludge waste, and filters for use in separating waste water and sewage sludge, all being part of waste purification installations; Heat generators, heat accumulators, heat exchangers and bioreactors for use in the treatment of sewage sludge waste, all being part of waste purification installations; Biogas fermenters for sewage sludge waste treatment, all being part of waste purification installations; Machines and installations for sewage sludge waste treatment, namely, thickening and dewatering machines for use in the treatment of sewage sludge waste; Thickening and dewatering machines for use in treatment of liquids, namely, sewage sludge waste of all kinds; Machines and installations for the thickening, dewatering and separation of sewage sludge waste; Machines and installations for waste disposal, in particular sewage sludge waste from waste purification, namely waste disposal incinerators