Machines for generating energy, namely, electrical and electronic apparatus and equipment for use in generating energy obtained from alternative energy sources; Mobile electric power generators; Steam-operated power generators; Electric power generators using geothermal power; Machines for generating energy of renewable products, namely, biogas applications to convert waste into energy, namely, blowing machines for the compression, exhaustion and transport of gases

Biogas fermentation reactors, namely, percolating fermenters and dry fermenters used to generate thermal energy from sludge from waste water clarifying installations; Hydrolysis reactors used to generate thermal energy from sludge from waste water clarifying installations; Alternative energy generation power plant installations using sludge from waste water for generating thermal energy; Water filters and waste water purification installations for the treatment, purification, filtration and supply of water and for the treatment of waste water and effluent; Bioreactor for use in the treatment of waste water and sludge waste; Steam generating machines and installations generating energy using waste water; Heat generators used for producing thermal energy, in particular steam, through the use of waste water; Waste water clarifying installations and installations for treating waste water comprising settling pipes, settling tanks, settling pits, separators; Industrial waste water treatment installations, namely, waste water treatment tanks and purification installations for the treatment of sewage of all kinds; Machines used for the treatment of wastewater comprising waste water treatment tanks, clarification and thickening machines for use in treatment of liquids in the nature of water, waste water and sludge, and filters for use in treatment of waste water containing hydrocarbons; Waste water purification units and water and sludge collector system components, namely, non-metallic sprockets, non-metallic wall brackets and rails, non-metallic chains, non-metallic and metallic head-shaft assemblies, spindles, collars and interlock keys, clutch assemblies, and clarifiers, collectors, sludge and scum skimmers, and scrapers all sold as a unit; Heat generators, heat accumulators, heat exchangers and bioreactors for use in the treatment of wastewater; Percolating fermenters and dry fermenters for waste treatment in connection with waste water; Machines and installations for water treatment, namely, thickening and dewatering machines for use in the treatment of waste water; Machines and installations for mixing and aerating waste water and return mud sludge for effecting biological waste water treatment processes, namely, mixers and stirrers; Thickening and dewatering machines for use in treatment of liquids, namely, waste water, effluent and sludge of all kinds; Machines and installations for the thickening, dewatering and separation of sludge; Machines and installations for waste disposal, in particular sludge from waste water clarification, namely, waste disposal incinerators

Installing and maintaining machines for the processing and treatment of sludge of all kinds; Installing and maintaining machines and installations in connection with sludge tanks, sludge collectors, sludge filters, sludge digestion and sludge fermentation installations; Installing and maintaining machines and installations for the thickening, dewatering and separation of sludge; Installing and maintaining machines and installations for waste disposal, in particular sludge disposal, sanitary apparatus and installations; Installing and maintaining machines and installations for generating energy, in particular gas and power, with all the aforesaid machines and installations being parts for waste water clarifying installations