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2nd Installation in Wales of ResMix 5000cc System

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Monday, 10 July 2017 08:00

In July 2016, Gurney Environmental initiated the installation a second ResMix 5000cc ‘Source Management' system for Welsh Water/DWR CYMRU at Llangdegfedd Reservoir in South Wales completing the project recently.

The system was delivered to the site and underwent final assembly before being lifted by helicopter to its predetermined location in the Reservoir. The order of a second ResMix 5000cc ‘source management’ system comes almost exactly two years after the installation of the first Welsh Water ResMix 5000cc ‘Source Management’ system at Ponsticill Reservoir near Merthy Tydfill. The installation of the ResMix 5000cc at Ponsticill was the first in the UK for the 5000cc model.

The ResMix ‘source management’ system has rapidly become the preferred choice amongst many water utility companies as a means to improve and manage raw water quality before treatment. The ResMix system provides top down, broad flow circulation (bfc) in storage reservoirs, thereby saving significant OPEX costs at the WTP. Iron, manganese, nutrients, blue green algae, taste and odour forming compounds have all been reduced or eliminated after the installation of ResMix, resulting in less treatment required at the WTP.

Cost effective, simple to install with very low energy consumption, ResMix provides sustainable source management for the first time. The ResMix 5000cc consists of two counter rotating, surface-mounted, large axial flow mixers, each with 5m diameter impellers. The units are able to transfer 20 tonnes of water from the surface to the bottom of a reservoir every second. This significant transfer of surface water not only evens out water temperature, preventing thermal stratification, but also increases net dissolved oxygen levels throughout the water column of the reservoir, thereby addressing many water quality issues.






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We've already found that the ponds work a lot better, they are a lot cleaner and functionally look a lot better than what they were previously. It seems to be working at this stage, so we're quietly confident that it's going to be a good investment.

Richard Kirby Regional Sewerage Business Unit Manager Nelson, New Zealand

...there is no doubt about it, the ResMix system works! Having started with a volatile and inconsistent chlorine residuals in our supply, we are now using the WEARS product to mix and dose our tanks. We are not alone in our experiences here. All I can say is that the results speak for themselves.

Doug Moorby Manager of Engineering Operations Norromine Shire, Australia

Adding the Accel-o-Fac® system to South Gippsland Water treatment cells where traditional surface aeration was previously used allowed the corporation to significantly reduce energy use. The savings in kWh are excellent with one application saving 72% in energy compared to the previous year.

Brett Vurlow South Gippsland Water Victoria, Australia

The fact that there is no associated sewage odours [with the Accel-o-Fac wwtp] meant that the system could be located relatively near to the village, and, after 10 years of use, no sludge removal has been needed.

Stephen Twyford Land & Property Department, Holkham Estate, Norfolk, UK

These results show that the [ResMix] mixer is providing a fully mixed water column and preventing conditions for manganese and nutrient release from the sediments.

Stuart Holden Process Engineer, United Utilities Engineering Ridgegate Reservoir

We are very pleased to be using this innovative management system in the reservoir at Pontsticill. This investment will improve the water quality for customers in the area and ensure they continue to receive a top quality supply of drinking water long into the future.

Roy Samuel Capital Delivery Manager, Welsh Water - Dwr Cymru

The Aero-Fac system at Windsor has to date met and exceeded our consent discharge levels, and we have been very happy with the system installed.

Andrew Dunning The Crown Estate Windsor

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