Machines, mechanical equipment, machine tools and parts therfor, for the storage, treatment, conveyance and discharge of liquids, waste of all kinds; machines, machine installations, and parts therefor, namely, screenings, clarified sludge and filter cakes, for the separation of liquids or sludge within containers and septic tanks, by means of circulation, stirring and gas injection; machines, machine installations, and parts therefor, namely, pipes, sliding valves, contactors, back-pressure valves, strainers, grit collection chambers, for the separation of liquids by means of circulation, stirring, gas injection and particulate discharging; machines, machine installations, and parts therefor, namely, grit extractor-classifiers, grit washers, sifters, rakes, rake cleaners, fixed, travelling or rotating basin bridges and circulation bridges, for the treatment of liquids and sludge by means of circulation, stirring, gas injection, aeration, sludge collection and particulate discharging; machines, machine installations, and parts therefor, namely, surface aerators, aerating rotors, aerating gyros, underwater aerators, stirrers, raking machines, circulating screws, floating matter collectors, sludge collectors, grit chamber collectors, trickling filters, sludge compactors, sludge conveyors, drag conveyors, bucket wheels, sewage pumps, sludge pumps, screen shredders, filters, filter presses, filter press plates and frames; digestion tank devices incorporating septic tanks; water heating apparatus (parts of machines); mechanical apparatus, namely, mechanical circulation, stirring, gas injection, spraying and/or scum-swirling apparatus for separating digested sludge; filter cake bunkers (parts of machines) and conveyors; all the aforesaid goods wholly or partly of metal, concrete, ceramic and/or plastic, clarifying installations comprising the aforesaid goods for the separation of liquids or sludge; mechanical apparatus being sewage pulverizers; all the aforesaid goods included in this class; basin covers, gullies, weirs, grates, grilles, inlets, circulation agitators and rotary sprayers being machine parts for machines for the storage, separation, conveyance and discharge of liquids, waste of all kinds; machine and machine parts, namely, screenings, clarified sludge and filter cakes, included in this class.

Computer hardware and software for the control, process management and operation of installations for the storage, treatment, conveyance and discharge of liquids, waste of all kinds, screenings, clarified sludge and filter cakes.

Scientific and technological services and research and design relating thereto, industrial analysis and research, in particular planning, preparation and conducting of internal and external building projects, in particular hydraulic structural and civil engineering projects, and installations for the storage, treatment, conveyance and discharge of liquids, waste of all kinds, screenings, clarified sludge and filter cakes; environmental services, namely, research, monitoring and analysis of pollution, testing and consultancy relating to the aforesaid services; monitoring the quality of waters, air, gases and liquids.