Other cleaning applications in the water industry

Spray nozzles and systems are used for many cleaning applications in the water industry. This list is by no means exhaustive but a number are listed below:

  • Scum removal
  • Grit washing
  • Wall cleaning
  • Launder cleaning
  • Aeration tank washdown

The table below details the different nozzles used in cleaning applications by different wastewater plant processes.

ProcessTypical nozzle useNozzle type
Filtration systemsBackwashing filter media, washing filter screensFlat fan or full cone
Sedimentation tanksCleaning walls, scum removalFine spray or hollow cone
Grit removalWashing screens to prevent cloggingFull cone
Primary sedimentationScum and sludge removal – although mechanically driven scrapers are commonly used to push sludge towards a hopper for removal, nozzles can also be used in conjunction with these systems. For example, jet nozzles might be used to help dislodge and remove debris from the inside of equipment, ensuring smooth operation of the sludge collection system.Flat fan
Biological treatment tanksCleaning wallsRotary or full cone nozzles
Secondary clarifiersRemoving algae or biofilm buildup on launders and wallsFlat fan
Sludge handlingWashing sludge hoppers, tanks and trucksFlat fan or rotary jets

Nozzles for cleaning in the water industry

Key applications

Engineering Challenges

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