Mechanical aerators are an excellent low capital costs aeration option with the advantage of maintaining the same performance efficiency for the life of the equipment. Ideal for smaller tank applications to larger scale earthen basins, mechanical aeration can be utilised in shallow or deeper water levels.
Where other aeration technologies require large infrastructure frameworks, mechanical aerators are simple to install, use, move and maintain.
ATB Water’s HSA Surface Aerators draw the water from the bottom and sides, spraying it back onto the surface. The spray is horizontally injected into the water surface over 360° and the turbulence creates micro bubbles which are pushed downwards. The flow pattern generates a perfect oxygen dispersion and full homogenisation even in deep basins and on large surfaces.
Features
The ATB HSA Surface Aerator is a direct drive, high efficiency aerator with an optimised dual helix impeller. Micro bubbles are formed by the optimal transfer of kinetic energy into the water surface, resulting in a high oxygen dispersion over large surfaces with optimised mixing capacity. Other features include:
Suitable for deep basins
Power ranges from 3—110 kW
Motor IP56 and covered motor ventilation
High efficiency IE3 motors
High oxygen transfer in wastewater due to high alpha factor
The ATB HSA-HSM Combined Surface Aerator and Mixer combines a surface aerator and a vertical agitator in one unit. Both motors can be switched on and off independently of each other. The unit contains a direct drive, high efficiency surface aerator with an optimised centrifugal impeller, combined with a direct drive high efficiency mixer with an optimised axial impeller. It creates a micro bubble formation as a result of optimal transfer of kinetic energy into the water surface. The mixing pattern leaves no dead spots in the tank volume.
Features
The ATB HSA-HSM combined Surface Aerator and Mixer is highly efficient, has low maintenance requirements and is quick and easy to install. It is ideal for deep tanks and varying water levels. Other features include:
High oxygen dispersion over large surfaces
Optimised mixing capacity, even in deep basins
Intensive and high turbulence downdraft mixing
Nitrification and denitrification provided in one unit
Resistant to coarse materials and clogging by fibres
Low aerosol emissions
No baffling in the tank needed, no surging
Motor IP56 and covered motor ventilation for the aerator and IP 68 for the mixer
High efficiency IE3 motors for the aerator
Float, cone, motor flange support and impeller: AISI304
ATB Water’s AQUA 5S Surface Aerator comprises a floating body, attachments, motor unit and guide ring seal. Its horizontal jet is directed downwards at an angle and has an injection depth of approximately two metres. The design of the AQUA 5S ensures minimal aerosol generation and stirring up of bottom sludge and is best suited for pond systems and standing surface water.
Features
The AQUA 5S Surface Aerator features:
Adjustable angle for jet
Injection depth of approximately two metres
Power range of 560 Watt
Polyethylene body and attachments
Stainless steel motor unit
Protective grating for fish and floating material
High mixing capacity
Minimal aerosol generation
Inclined position that avoids stirring up bottom sludge.
The ATB Water AQUA 8 Floating Surface Aerator is a direct drive, high efficiency floating device for the aeration and mixing of wastewater. The AQUA 8 generates an upward directed flow. The accelerated water hits the baffle plate, which is located just above the water line, there it is deflected horizontally and generates a highly turbulent flow on the water surface. The turbulence creates extremely fine air bubbles, which are then pushed downwards by the flow. The result is an excellent oxygen transfer. The generated cylindrical flow leads to a perfect oxygen dispersion and at the same time to a complete mixing of the tank.
Features
The AQUA 8 Floating Surface Aerator comprises a separable float with suction pipe and the motor unit with propeller and distributor. All materials are made of V2A stainless steel or plastic. Other features include:
Fine bubble formation as a result of optimal transfer of kinetic energy on the water surface
Two-part float with motor and propeller
Propeller made of polyethylene (AQUA 8-M) or stainless steel (AQUA 8-T)
Float and spray cone made of polyethylene
Motor housing made of stainless steel
Guiding in the basin by two vertical stainless steel chains
Immersion tube, fastening material and guiding chains made of stainless steel
Applications for ATB Water’s BEA Ejector/Jet Aerator include SBR systems, activated sludge systems, pond systems, mixing and equalisation basins, and aerated sludge storage tanks. The compact design and easy installation make it possible to use in basins of any shape and size.
Features
The BEA Ejector/Jet Aerator features:
Power ranges from 2—25 kW
Stainless steel V2A and V4A or cast iron
Horizontally directed, focused jet
Free standing on the ground installation
Directional flow that is optimal for narrow, elongated basins
Quiet system as it is submerged in the liquid being treated
Easy installation.
The BEA Ejector/Jet Aerator is not suitable for deep basins.
ATB Water’s CWE Clear Water Extractor with open discharge weir is designed to discharge the clear water layer below the surface and block bulking sludge and floatables. The float is positioned by a guiding system with optional wall brackets. The attached limiting legs prevent damage to the discharge system when emptying the tank. To prevent the tank fully emptying the length of the legs can be adjusted so that the CWE weir stops at the lower trigger point.
Features
The construction of ATB’s Clear Water Extractor ensures it is always in the best position in the clear water layer below the water surface. It’s features include:
Capacity range: 50—1,500 m3/h
Stainless steel V2A and V4A
Discharge system fully flexible PVC hoses or stainless steel pipe systems as telescopic or swivel joint system
Horizontally opened inflow area
Discharge can be either gravitational or with pump (optional)
The ATB Water CWE-EMC Clear Water Extractor is equipped with a linear actuator which closes the weir watertight to the bottom of the float. This automatic closure system ensures no sludge can get into the overflow during aeration and mixing. Its floating construction means it is always in the best position in the clear water layer below the water surface.
Features
The CWE-EMC Clear Water Extractor features include:
Capacity range: 50—1,500 m3/h
Materials: stainless steel V2A and V4A
Discharge system fully flexible PVC hoses or stainless steel pipe systems as telescopic or swivel joint system
Horizontally opened inflow area
Automatic closing system during aeration and mixing ensures no sludge enters the overflow
Does not stir up sedimented sludge
Discharge is gravitational (optional pump)
Simple installation
Linear actuator with integral end position switches
Adjustable top fixation system for linear actuator.
The ATB Water CWE-025-P and CWE-050-P Clear Water Extractors are designed to discharge the clear water layer and block bulking sludge and floatables. The discharge pump is placed below the float and can be removed from the tank for maintenance. The pump is protected by a stable immersion tube so that no floating or bulking sludge can enter the discharge system during the clear water extraction. The stainless steel immersion tube also prevents complete emptying of the tank and prevents damage to the pump at maximum emptying. A chain guiding system ensures that the decanter is guided accurately in the basin.
Features
The CWE-025-P and CWE-050-P Clear Water Extractors features include:
Designed for flow rates of 25 m3/h and 50 m3/h respectively
Two-part float with clear water extraction pump – separate units for engine and float
Stainless steel pump and drain weir
Polyethylene float
Stainless steel immersion tube, guiding chains and fastening material
Does not stir up sedimented sludge
Avoids discharge of floatables
Adaptable to variations of the water level
Discharge via flexible hose as a pressure line to the edge of the basin
