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Floating Brush Aerators

Floating Brush Aerators are ideally suited for operation in municipal sewage treatment lagoons, especially shallow lagoon applications where vertical shaft-type aerators cannot operate.

In a lagoon Floating Brush Aerators move the wastewater horizontally and create a circular flow pattern to prevent short-circuiting, and maximising lagoon treatment capacity. The horizontal mixing circulates highly oxygenated water throughout the lagoon, creating an oxygen cap to reduce odours from anaerobic breakdown of settled sludge.

The effective mixing provided by Floating Brush Aerators is also useful to create mixed conditions to minimise algal growth, and to redistribute accumulated sludge more evenly over the entire floor/base of the lagoon, thus improving lagoon treatment capacity & performance.

Floating Brush Aerators are also suitable for aeration in oxidation ditches, Pasveer channels, SBRs, equalization basins and aerobic digesters of all sizes and configurations.

Floating Brush Aerator operating in an oxidation ditch

Advantages

  • High aeration and mixing efficiency
  • Robust design for harsh operating environments
  • Ease of installation & operation
  • Low & simple maintenance

Standard Specifications

ParameterUnitsFBA-022FBA-037FBA-056FBA-075FBA-110FBA-150FBA-186FBA-220
Aerator sizekW2.23.75.67.5111518.622
*1Standard Oxygen Transfer Rate (SOTR) kgO2/h46.710.113.519.82733.539.6
*2Mixing ratem3/min3966100134196267331392
Assembled weight (approx.)kg5306609101,1401,5602,2802,7303,090
Motor operates at 90% load based on nameplate data
Stainless steel grease lubricated drive end and non-drive end bearings with minimum L10 rating of over 100,000 hours
Gear reducer with minimum 2.0 service factor
Triple-seal protection system for drive enclosure, completely sealing the drive assembly
Factory test certificate for aeration efficiency
Surface treatment for stainless steel weldments: SSPC-6 commercial shot blast passivation, acid bath pickling

*1Based on factory tested Standard Aeration Efficiency (SAE) of 1.8 kgO2/kWh. *2Based on factory tested Mixing Efficiency of 17.8 m3/min per kW

STANDARD INCLUSIONS + OPTIONS

✓= Standard Supply, o = Optional Supply

EquipmentFBA-022FBA-037FBA-056FBA-075FBA-110FBA-150FBA-186FBA-220
Complete aerator assembly including frame, foam-filled floats, rotor with blades, splash shields (2x both sides of rotor), service platforms (2x), drive assembly comprising motor, gear reducer and coupling
Mooring arm assembly, comprising 2x 5.5m long mooring arms, 1x cross brace & 2x mooring/anchor caps and 2x mooring stakes, for lagoon mounting
Custom mooring systemoooooooo
*1Motor is TEFC, 415V, 3-ph, 50 Hz, class F insulation with IP55 protection & thermistors
Motor with custom IP ratingoooooooo
*2Rotor coveroooooooo
*3Oil change kit

*1Motor suitable for DOL, VFD or soft start. *2Rotor cover eliminates spray. Splash shields are replaced by rotor cover when rotor cover is ordered. Note the rotor cover will lower the aeration efficiency by around 7.5%. *3Oil change kit required for gearbox oil changes. One (1) oil change kit is supplied with every aerator project regardless of quantity ordered.

Materials of construction

ComponentsMaterials
Group 1Drive end shaft & non-drive end shaft316 SS
Group 2Foam-filled floats, floatation band attachments, non-drive end bearing cover, motor cover, splash shields (2x) and optional rotor cover 304L SS
Group 3 Rotor and rotor blades, frame, drive enclosure, service platforms (2x) and mooring arm assemblyOption ATGIC Powder Coated 
Option BHot-dipped galvanised 
Option C304L SS 
Option D316L SS 

STANDARD EXCLUSIONS

  • Control Panel
  • Power cable fitted with 3-ph plug, for termination at aerator motor junction box
  • Electrical 3-ph socket with local isolator mounted on a post, located at aerator on the embankment