Apparatus for waste sewage treatment (installations); Machines for the processing (purification) of sewage; Sewage purification apparatus; Sewage purification machines; Transportable apparatus for processing sewage; Apparatus for waste water purification; Industrial waste water purification plants; Installations for the purification of waste water; Installations for the treatment of industrial waste water; Installations for waste water engineering; Waste water treatment apparatus; Waste water treatment installations; Apparatus for filtering water; Apparatus for the filtering of organic matter; Filter apparatus for the separation of solids and liquids; Filter apparatus for water supply installations; Filtering apparatus (industrial) for fluids; Filtering installations for water; Filters for sanitary water distribution apparatus; Filters for use with apparatus for sanitary purposes; Filters for use with apparatus for water supply; Water filtering apparatus for industrial use; Water filters for industrial purposes; Water purification filters; Water treatment filters; Water treatment lime dosing machine; Water treatment lime dissolving machine