Wastewater treatment tanks (for industrial purposes); Septic tanks (for industrial purposes); Apparatus for methane fermentative treatment of wastewater; Apparatus for treatment of organic wastewater; Apparatus for treatment of wastewater; Dust collecting apparatus for use in treatment of wastewater; Water treatment apparatus; Apparatus for treatment of domestic wastewater; Apparatus for treatment of wastewater for industrial purposes; sewage purification apparatus; Carriers of microorganisms for use in wastewater treatment apparatus; Dust eliminators for use in wastewater treatment installations; Grit lifters for use in wastewater treatment apparatus; Grit washers for use in wastewater treatment apparatus; Grit collectors for use in wastewater treatment apparatus; Screen residue washers for use in wastewater treatment apparatus; Screen residue dehydrators for use in wastewater treatment apparatus; Waste conveyors for use in wastewater treatment apparatus; Hoppers for use in wastewater treatment apparatus; Sludge collectors for use in wastewater treatment apparatus; Scum removers (scum skimmers, scum separators) for use in wastewater treatment apparatus; Air diffusers for use in wastewater treatment apparatus; Stirrers for use in wastewater treatment apparatus; Flocculation settling basins for use in wastewater treatment apparatus; Sand filters for use in wastewater treatment apparatus; Ozone-biological activated carbon filters for use in wastewater treatment apparatus; Strainers (filtering apparatus) for use in wastewater treatment apparatus; filtration units for use in treatment of wastewater apparatus; Filter basins for use in wastewater treatment installations; waste fluid nitrification tanks for use in wastewater treatment installations; dehydrators for use in wastewater treatment apparatus; drying units for use in wastewater treatment apparatus; Biological deodorization, activated carbon deodorization, chemical cleaning deodorization or soil deodorization units for use in wastewater treatment apparatus; deodorization units for use in wastewater treatment apparatus; Chlorine disinfection units for use in wastewater treatment apparatus; Chlorine disinfection units; Ozone disinfection units for use in wastewater treatment apparatus; Ozone disinfection units; Ultraviolet disinfection units for use in wastewater treatment apparatus; Ultraviolet disinfection units; Chlorine dioxide disinfection units for use in wastewater treatment apparatus; Chlorine dioxide disinfection units; disinfection units for use in wastewater treatment apparatus; ultrafiltration membrane reclaimed water apparatus (wastewater treatment apparatus); membrane separation treatment apparatus (wastewater treatment apparatus); sewage sludge purification apparatus; Sludge purification apparatus; Sludge thickeners for use in wastewater treatment apparatus; Sludge thickeners; Sludge dehydrators for use in wastewater treatment apparatus; Sludge dehydrating machines; Sludge dehydrators; Sludge drying apparatus; Water purifying apparatus; Water purification installations; Filtration units for use in water purification installations; Chemical production units for use in water purification apparatus; Chemical feeding units for use in water purification apparatus; Membrane filters for use in water purification apparatus; Apparatus for household purposes, for treatment of wastewater; Septic tanks for household purposes; wastewater treatment tanks for household purposes; Ceramic membrane filtration apparatus for wastewater treatment; Organic membrane filtration apparatus for use in treatment of wastewater; Membrane filtration apparatus for use in treatment of wastewater; Filters for membrane filtration apparatus for use in treatment of wastewater; Filter units for membrane filtration apparatus for use in treatment of wastewater; Casings for membrane filtration apparatus for use in treatment of wastewater; Membrane filtration cartridges for use in treatment of wastewater; Replaceable membranes for membrane filtration apparatus for use in treatment of wastewater; Air diffusers for membrane filtration apparatus for use in treatment of wastewater