Biwater Treatment - Products
Aerators - Horizontal Rotor
Products
Rotating Bar Interceptors
Coarse Screen
Grit Removal
Tank Scrapers
Aerators - Horizontal Rotor
Aerators - Vertical Shaft
•Medium Speed
•Slow
Speed
Tertiary Treatment
Package Plants
Aerators - Horizontal Rotor |
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 45KW Maxi Rotors in operation at Shieldhall WwTW, WoSW |
Key Features: • High oxygen transfer rates • Configuration enables ‘nitrification/denitrification’ control • Complete mixing and circulation velocities through aeration tanks • Robust, rugged construction and non-clog design • Maximum aerosol and splash protection • Dissolved oxygen monitoring and variable speed motors available |
| General Description: The biological oxidation process by horizontal rotor aeration works through the mixed flow principle. A rapid turbulence of the ditch contents mixes influent with air. It is simple, inexpensive, and efficient. Biwater’s range of horizontal aerators cater for small community treatment plants up to major installations serving 250,000 population or greater. All horizontal aerators are non-clog design, rugged construction, with high efficiency operating characteristics. Three rotors are used in Biwater ditch systems, with the MINI rotor being the smallest, the MIDI an intermediate size and the MAXI the largest. The design of Biwater’s horizontal rotors ensure high oxygen transfer rates as well as complete mixing and circulation velocities with a minimum expenditure of power. The proven operating characteristics mean that the rotor installations are simple, inexpensive and efficient. THE MAXI ROTOR: Able to provide in excess of 9.0Kg dissolved oxygen per hour per metre of rotor length with correct selection, the MAXI is a rugged construction, vigorous turbulence rotor. It has a diameter of 1,000mm and is manufactured in standard lengths of 4.5, 6.0, 7.5, and 9.0 metres. Intermediate lengths can be manufactured. THE MIDI ROTOR: This intermediate sized rotor is of similar configuration to the MAXI rotor. An oxygen transfer rate approaching 4.5Kg/m/hour is possible. Maximum unit length is around 4.5m but it possible to couple rotors together to give greater individual length. THE MINI ROTOR: For smaller installations, the MINI has been proved in performance in hundreds of installations worldwide. The rotor is 700mm diameter, with maximum oxygen transfer of some 3.5Kg/m/hr and maximum unit length of 4.0m. Again, coupled units can provide greater individual length if required. Construction is of cage form. |
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| HIGH OXYGEN TRANSFER RATES All Biwater horizontal rotors have been independently tested and have proven high rate performance. FLEXIBILITY Oxygen transfer is variable against rotor blade immersion, providing flexibility in operation, and giving capacity to handle shock load conditions. In addition, further flexibility can be achieved with a multi rotor plant, by switching off one or more units against demand. Dissolved oxygen monitoring equipment will cater for these features, prime rotors have 24 hour operation to provide the necessary circulation. IDEAL CIRCULATION VELOCITIES Rotors provide complete mixing and circulation velocities in the aeration tank, with vigorous flow. EASY MAINTENANCE ACCESS A major advantage associated with Biwater Treatment’s range of horizontal rotors is that full maintenance access is available to all components from bridge level without the need to interfere with tank contents. |
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| Click here for printable PDF | |
Tony Gillard
Business Development Manager
+44 (0)1706 367555
Reference Sites
• Market Drayton STW, Severn Trent Water
• Eye STW, Anglian Water
• Wisbech STW, Anglian Water
• Rugby Newbold STW, Severn Trent Water
Biwater
Treatment Ltd Biwater Place, Gregge St, Heywood,
Lancashire, OL10 2DX
T:+44(01706) 367555 F: +44(01706) 365598 e:info@biwater.com
©Copyright Biwater Treatment Ltd
T:+44(01706) 367555 F: +44(01706) 365598 e:info@biwater.com
©Copyright Biwater Treatment Ltd
