|
NL8100926A
|
|
Continuous effluent treatment by anaerobic fermentation - preceded by flotation to remove part of the waste matter
|
|
ATA8881A
|
|
Device for driving a liquid in a channel
|
|
AT387955B
|
|
Device for driving a liquid in a channel
|
|
NL7811242A
|
|
Device for aerating a liquid.
|
|
NL7711505A
|
|
Device for aerating a liquid.
|
|
NL7711017A
|
|
Aeration device.
|
|
DE2636221A1
|
|
DEVICE FOR WASTE CLEANING
|
|
DE2526328A1
|
|
WING PUMP
|
|
NL7501678A
|
|
Sludge scraper wear indication - by activation of an alarm shortly before rubber scraper wears out and drive plate is damaged
|
|
NL7500438A
|
|
Activated sludge treatment - in series of vessels to accommodate variations in loading
|
|
US3980740A
|
|
Devices for aerating liquids
|
|
DE2452548A1
|
|
CENTRIFUGAL PUMP
|
|
NL7414448A
|
|
Variable discharge screw-type pump - has trough extension pieces sliding clear of end in axial direction when not needed
|
|
NL7402019A
|
|
Surface aerater for biological treatment of sewage - in which oblong ejector slot, covering large section of sewage surface, also assists flow
|
|
NL7315817A
|
|
Centrifugal pump for waste water with solid components - has diametrically running cutter bar in intake opening providing cutting action
|
|
NL7315816A
|
|
Centrifugal pump for waste water with solid components - has diametrically running cutter bar in intake opening providing cutting action
|
|
GB1360156A
|
|
Devices for removing floating liquids
|
