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.