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Save space, money and water with this new clarifier process.
At Pollutec 2007 (Paris,
France; November 27-30),
Veolia Water Solutions & Technologies
(Paris,
edlinks.che.com/7368-531) introduced the next generation of its Actiflo
clarifier process for potable and process water - Actiflo Turbo. Like its
predecessor, the patented Actiflo Turbo process uses microsand to enhance
flocculation and settling, which makes the process quicker to startup, more
stable in operation and requires a smaller footprint, when compared to
alternative processes. Flocculation time is reduced to 3 min. and clarifier
rise rate is increased to 80 m/h, compared to up to 40min. flocculation time
and 1-10 m/h rise rate with traditional clarification, says the firm.
Actiflo
Turbo features a Turbomixer reactor (diagram), which enhances the quality of
flocculation by avoiding dead zones and improving the homogeneous mixing in
the flocculation tank. An additional feature of Actiflo Turbo is the ability
to thicken the sludge discharge up to 2%, thereby reducing water loss to approximately 0.3% of the influent flow.
The
first commercial application of Actiflo Turbo, currently under construction
at Clareville, Ireland, will produce 90-million
L/d of drinking water by mid 2008. The process can handle capacities in the
range of 20 to 5,000 m3
/h per single train.
Investment costs for an Actiflo Turbo facility (Clareville size) are said to
be 10% lower for equipment and 20% lower for construction than those for the
classic Actiflo process, and operating costs are reduced by about 20% due to
lower energy consumption, says Veolia.
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