US4551108B1
(en )
1996-12-03
Exercise device for use in tank containing water
US4563277B1
(en )
1996-08-27
Apparatus for aerating and mixing waste water
DE3569098D1
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1989-05-03
Apparatus for the aeration of waste water or similar matter in aeration tanks
EP0198334A3
(en )
1988-06-15
Water clarifier and sewage treatment device
ZA87379B
(en )
1987-09-30
Composition and method for flocculating and removing solids suspended in water
YU41243B
(en )
1986-12-31
Device for deep aeration of waste waters
YU13488A
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1990-04-30
Device for adjusting liquid level in cells of flotation device for purifying waste waters
EP0262717A3
(en )
1988-09-28
Apparatus for contacting a gas with a liquid, in particular for aerating waste water
NZ219664A
(en )
1989-06-28
Installation of removable waste water tank in recreational vehicle
EP0114408A3
(en )
1985-07-31
Process for detecting the level of sludge, especially in settling pools of sewage treatment plants, and device for carrying out the process
GB8712714D0
(en )
1987-07-01
Detecting level of liquid in tank
GB2120546B
(en )
1986-04-16
Improvements in or relating to water aerating apparatus
DE3369652D1
(en )
1987-03-12
Waste water clarifier
GB2183625B
(en )
1990-05-16
Apparatus for the anaerobic treatment of waste water
GB2151497B
(en )
1987-08-05
Improvements in waste water treatment plant
DE3790752D2
(en )
1989-01-19
System for pressurized drainage of sewage and other liquid waste
YU212786A
(en )
1988-10-31
Flotation device for waste waters purifying
DE3473472D1
(en )
1988-09-22
Process for the treatment of process waste waters and waste waters in the hydrogenation of coal
FR2577757B1
(en )
1987-05-15
DEVICE FOR PURIFYING WATER FROM FISH CELLS
JPS5372366A
(en )
1978-06-27
Method of discharging sludge in purifying tank for waste water purifier
YU4381A
(en )
1983-09-30
Device for biologically purifying waste water in aerated pools with an active recirculation of slurry
KR890006901Y1
(en )
1989-10-12
Device for purification of waste water
GB8716573D0
(en )
1987-08-19
Biological purification of waste waters
PL255436A1
(en )
1986-05-06
Liquid aearating grate in particular for waste water
PL261743A1
(en )
1988-06-09
Device for aeration of water in shallow basins