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Bollfilter has signed a framework agreement with Anglian Water to provide a three-year maintenance and repair contract for the Boll nitrate removal plant (NRP) protection systems.

Anglian Water serves more than six million domestic and business customers in the east of England and Hartlepool.

Much of the region is arable land and, as a result, certain potable water treatment plants in the area require nitrate removal.

Nitrate removal plants are high-value capital equipment requiring pre-filtration to protect the internals from risk of contamination and Bollfilter automatic filters have been installed on 12 such Anglian Water sites.

The filters typically provide filtration to 150 microns, with a set backflush once an hour.

Automatic alarms are activated should the differential pressure rise above agreed levels.

Anglian Water recently signed a framework agreement with Bollfilter UK to provide maintenance and repair for the Boll nitrate removal plant protection systems.

Although the filters are designed for long-life operation with minimal maintenance, the framework agreement covers regular annual servicing and repairs at a negotiated fixed rate, extending the service warranty over the contract period.

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