Ulpha WTW - Actiflo for Crypto and Mn Removal

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Courtesy of

United Utilities
Maximum flow 22037 m3/day

The Client
United Utilities are the 2nd largest water company in England and Wales, responsible for an area in the north west of the UK including major cities such as Manchester and Liverpool.

The Client's Needs
Ulpha WTW is located near Millom in Cumbria in the Lake District National Park and it supplies 30,000 people in the greater Barrow-in-Furness area.

The purpose of the project was to prevent Cryptosporidium, reduce the levels of manganese in the final water and improve the disinfection system by reducing TOC content.

VWS Solution
United Utilities awarded the construction contract to VWS, who acted as sub-contractors under the Framework suppliers, HMBA.

Veolia Water Solutions & Technologies provided the process design, construction, installation, testing and commissioning of 3 Actiflo® High Rate Clarifiers and 2 Multiflo® for backwash water recovery. The project included sand storage, make up, transfer and recovery system, polymer make up and dosing system, MCC and software for the above systems.

Actiflo® is a very compact process that utilises microsand as a seed for floc formation. The microsand provides surface area that enhances flocculation and also acts as a ballast or weight.

The resulting microsand ballasted floc display unique settling characteristics, which allow for clarifier designs with high overflow rates and short retention times. These designs result in system footprints that are between 5 times smaller than classic lamella clarifier or dissolved air flottation and up to 20 times smaller than conventional clarification systems of similar capacity, with an ability to start up from a 'standby' mode of operation to a steady state operating mode within minutes.

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