|
DE1256167B
|
|
Longitudinal settling tank for waste water or similar fluids with a mobile sludge scraper
|
|
DE1212007B
|
|
Device for climbing the walls of sewer systems or the like.
|
|
DE1254546B
|
|
Device for introducing gases, in particular oxygen, into waste water or similar fluids
|
|
DE1118160B
|
|
Settling container with central inlet
|
|
DE1196138B
|
|
Chain scraper for rectangular basins
|
|
DE1195685B
|
|
Sand trap, especially for sewage treatment plants
|
|
DE1245869B
|
|
Wastewater rotary sprinkler for biological drip heads with changing inflow
|
|
DE1132058B
|
|
Process for the biological purification of waste water and return sludge
|
|
DE1112949B
|
|
Device for aerating waste water, in particular for activated sludge systems
|
|
DE957290C
|
|
Nozzles for rotary sprinklers
|
|
DE1149669B
|
|
Inlet device for circular settling basins
|
