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Floating Brush Aerators

Floating Brush Aerators (FBA) 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.

Advantages

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

Technical Specifications

Standard Specifications

Parameter	Units	FBA-022	FBA-037	FBA-056	FBA-075	FBA-110	FBA-150	FBA-186	FBA-220
Aerator size	kW	2.2	3.7	5.6	7.5	11	15	18.6	22
*¹Standard Oxygen Transfer Rate (SOTR)	kgO₂/h	4	6.7	10.1	13.5	19.8	27	33.5	39.6
*²Mixing rate	m³/min	39	66	100	134	196	267	331	392
Assembled weight (approx.)	kg	530	660	910	1,140	1,560	2,280	2,730	3,090
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 and Options

✓ = Standard Supplyo = Optional Supply

Equipment	FBA-022	FBA-037	FBA-056	FBA-075	FBA-110	FBA-150	FBA-186	FBA-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 system	o	o	o	o	o	o	o	o
*¹Motor is TEFC, 415V, 3-ph, 50 Hz, class F insulation with IP55 protection & thermistors	✓	✓	✓	✓	✓	✓	✓	✓
Motor with custom IP rating	o	o	o	o	o	o	o	o
*²Rotor cover	o	o	o	o	o	o	o	o
*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

Components			Materials
Group 1	Drive end shaft & non-drive end shaft		316 SS
Group 2	Foam-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 assembly	Option A	TGIC Powder Coated
		Option B	Hot-dipped galvanised
		Option C	304L SS
		Option D	316L 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

Disclaimer: We continuously update and improve our products and services, contact us for more detailed information or to confirm specifications. MAK Water takes no responsibility for any errors resulting from the use of information contained on this website.

Lagoon Aeration for Municipal STP

Municipal

A large Victorian Municipal Water Authority was upgrading its wastewater lagoons to cater for additional loads and required an aeration system to improve the wastewater treatment process. Key requirements for the aeration system included: • Shallow draft as the lagoons are only 1.5m deep • Quiet operations due to proximity of local residents (<70DbA) Aeration Demand requirements • BOD (Peak) – 231 kg O2/d, Actual Oxygen Transfer Rate (Peak) – 15 kg O2/hr

Floating Brush Aerators

Victoria

Data sheet

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Floating Brush Aerators

Standard Specifications

Standard Inclusions and Options

Materials of Construction

Real-world examples

Lagoon Aeration for Municipal STP

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