Sludge filters, namely, filter for sludge dewatering machines; Sand filters for machines in industrial or civil waste water treatment applications; Filtering machines for waste water processing in the nature of sorting solids from liquid matter; Screening machines for waste water processing in the nature of sorting solid matter from waste matter; Filters and filtering screens as parts of waste water separator machines; effluent and slurry or waste water filtering machines parts, namely, sifters and rake screens as separating machines and as machine parts; Sludge treatment machines; dewatering screens as a parts of slurry or waste water filtering machines; Sifting installations in the nature of slurry or waste water solids-liquid separators for use in extracting liquid from slurry or waste water materials; Sifters as machines and as machine parts for use in extracting liquid from slurry materials or waste water; solid-liquid separators for removing solids from manure slurry or waste material; press screw separators for use in separating solids from liquid; Machines for separating solids from liquids; Machines for separating solids from sludge; Waste material removal machines; Machines tools for removing waste material; Electric washing machines for industrial purposes; Pressing machines for use in separating the liquid phase from the solid phase of substances such as sludge, sewage, manure, waste water and vegetables; Screw compactors for continuous compacting of sludge, sewage, manure, waste water and vegetables; Machines for dehydrating sludge through pressing or mechanical process; Waste compacting machines; screw separating and compacting machines for liquids-solids separating and compacting of sewage, manure, waste water and vegetables; waste water scrapers as part of machines for removing solids and semi-solid from liquids; sludge scrapers machines for use in skimming solids from waste water; Machines for thickening waste water; Machines for thickening sludge; Screw thickener machine for use in thickening sludge or waste water; wastewater treatment thickener, namely, machine for thickening solid matter in waste water; Machines for crushing waste; Shredder machines for industrial use; Waste disposers; Mixing machines; sludge, sewage, manure, waste water mixers; screw mixer machines for mixing sludge, sewage, manure, or waste water for use in industrial and commercial applications; Polyelectrolyte milk preparation systems comprising agitator for circulating liquid media and dispensing valves being machines parts for use in milk preparation; Agitators for anaerobic digesters; Circulating pumps; Sludge pumps; Rotary lobe pump; Rotary pumps; Filtering, separating and sorting machines for processing sludge; Filtering, separating and sorting machines for processing waste material

Machines and installations for the mechanical purification of waste water; waste water purification filter for industrial or civil installations; Water filtering apparatus; Filters being parts for water purifying filtering installation; Biological contactor for treatment of sewage and drainage water; Biological reactors for clarifying water; Sewage treatment plants; purification installations for sewage; water purifying apparatus and machine; Apparatus, machines and installations for mechanical, chemical and/or biological water purification and water treatment; Installations for biological waste water treatment; Water purification, sedimentation and filtration apparatus for clarification, thickening and filtration of water, waste water and industrial water; waste purification installations for biological waste treatment; sewage purification installations for sewage system; waste water sanitizing treatment machine for aerating and circulating waste water; Machines for drying sludge through the use of heat and air; Machines for drying waste through the use of heat and air