Xylem signs North America filter distribution deal with Nuove Energie
Water technology company Xylem has signed an exclusive agreement with Nuove Energie to distribute a tertiary disk filter system for wastewater reuse and discharge requirements in the USA and Canada.
The Ultrascreen disk filter will be distributed by Xylem under the company’s Leopold brand for
customers who have a particular need for tertiary treatment to meet stringent requirements for
both discharge and reuse applications.
With tertiary treatment growing at a rate of six percent* and water reuse increasing at seven
percent** annually in North America, the agreement provides further opportunity for Xylem to
expand into these markets and offers complete North-American channels to market.
According to Xylem’s product manager, Robert Wiley the Leopold Ultrascreen disk filter
“provides ease of operation at the lowest life cycle costs in the industry.”
Its stainless steel components include the filtering mesh which can last for more than ten
years, said Wiley, “dramatically lowering the life cycle cost compared to other disk filters in the
industry which rely on woven plastic mesh or felt material.”
The AISI 316L stainless steel screens can handle high hydrostatic pressure and are easily
treated chemically to remove colloidal materials that permanently foul other disk media said Xylem.
This, combined with the patented “dynamic tangential filtration” operating principle delivers
“exceptional performance at higher loading rates with unprecedented durability,” the company
Dynamic tangential filtration is the result of deploying a continuously rotating screen that
forms an acute angle with the direction of water to decrease the screens’ opening size, trapping
smaller particles while allowing higher hydraulic and solids loading rates than other disk filtration
systems Xylem explained.
Screen rotation produces a stable forward flow rate, even during backwashing, to improve the
efficiency of ultraviolet (UV) disinfection which is further enhanced by the ultrascreen disk filter.
The filter also lowers chlorine or ozone demand, to reduce costs, Xylem claimed.
The filter is validated by Title 22 California Code of Regulations to treat flows up to 16 gallons
per minute per square foot of filter area which is up to 2.5 times higher than flow rates tolerated by
other media disk filter systems. The ultrascreen filer is capable of handling spikes in total
suspended solids loading rates of up to 150 mg/l without clogging, compared to 50-70 mg/l for
cloth disk filters.
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