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Berson’s UV systems are being used to disinfect reused backwash water from sand filtration units at the Spannenburg groundwater drinking water facility in the Netherlands.

Up to five per cent of the produced drinking water at the Spannenburg plant (1.25 million m3/year) is used to backwash the sand filters and, until recently, this water was simply discarded.

Following the installation of two Berson Inline+ UV systems this water can now be reused as drinking water, producing cost savings.

Berson supplied two Inline 250+ medium-pressure UV systems, each disinfecting up to 100m3/hour of backwash water.

They are positioned after the ultra-filtration units and before the sand filtration.

The UV systems produce a two-log reduction of CFUs with a water transmittance (T10) value of 63.1 per cent.

Operated by Vitens, the facility, 35km south of Leeuwarden, is the largest groundwater drinking water facility in the Netherlands.

The contractor for the backwash project was Logisticon Water Treatment.

‘A year since it was commissioned, the Berson UV systems are working very well and are completely reliable,’ said Peter Sjoerdsma, a process engineers at Vitens.

‘The reused backwash water is completely biologically reliable and we are totally confident to use it as drinking water.

‘We opted for UV as it is a clean technology that does not require the use of chemicals,’ he added.

The Spannenburg drinking water plant supplies more than 300,000 people spread over a large, mainly rural area of northern Holland.

A feature of the Berson UV technology installed at Spannenburg is its UV-Tronic+ V5 PLC controller, the latest version of Berson’s UV-Tronic controller range.

Based on a rugged industrial PLC and with an RS485-based Modbus interface, the UV-Tronic+ V5 links to the site’s Scada control system and allows users to set up and manage the UV system’s operating parameters to exactly match their requirements.

Berson UV can provide a complete range of UV systems with capacities between 10-10,000m3/hour, certified to the latest German DVGW norm, W294, Part 1, 2 and 3.

Berson has now been awarded the contract for an identical application in Zwolle, also operated by Vitens.

Berson UV-techniek

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