Process for the removal of fluoride from waste water.
NL9001974A
Device for cleaning waste water.
NL9000887A
Floating vegetation-island module - comprises three coarse-mesh nets spaced apart and one above other
NL8802077A
Method for chemically softening water with the crystallization method in a grain reactor.
NL8702843A
Method for anaerous purification of waste water and apparatus for carrying out this method
NL8700498A
Method for the removal of heavy metals from waste water.
CA1248646A
Process for removing of heavy metals from water in particular from waste water
US4741869A
Apparatus for contacting a gas with a liquid, in particular for aerating waste water
NL8502522A
Method and installation for cleaning liquid, in particular waste water, according to the active sludge method.
NL8403879A
Movable bridge for blocking traffic access - has chamber below pier surface accommodating span in open position
NL8401713A
Active sludge effluent water purificn. unit - has oblong open reservoir with central partition to vertical-axis surface aerator propelling the water and partly surrounded by curved wall
NL8401381A
Concentrating biomass in flow from bio-reactor using filter membrane - with 0.1-10 micron pores to pass dissolved matter detrimental to reaction before returning to reactor with 0.5-8 hours reactor dwelling time
NL8400714A
Active sludge effluent water purificn. unit - has centrally partitioned oblong open tank contg. vertical-axis bladed aeration-propulsion rotor
NL8303557A
Method for the removal of heavy metals from waste water.
NL8103120A
Chemical de:phosphating of water - on fluidised bed of carrier promoting crystallisation of insol. calcium phosphate cpds.
NL8101441A
Geodetic height difference meter - has optical sighting system linked to microprocessor-controlled data register
NL8001581A
Upflow reactor for anaerobic waste water purification - has floating granular filter to prevent sludge carry-over by gas into clean water
NL7908714A
Filter tube for lining spring facilitating insertion - connects to pressure source and forms its own injector
EG14638A
Dredging vessel
DE2930745A1
Self-propelled river dredger - has mouthpiece type suction pipe connected to pump on board, outlet pipe with mouthpiece having remote controlled adjustable valve
