The Lynemouth Phase I mine water treatment scheme (MWTS) is located on the Northumberland coast on the site of the former Ellington Colliery.
Coal mine water is abstracted at a rate of approximately 115 L/s from an abandoned mine shaft, treated through two lagoons configured in series before being discharged into the sea. The lagoons are constructed in colliery spoil and lined with an HDPE liner.
The treatment process is designed to reduce total iron in the effluent which presents as ochre sludge in the lagoons; the mine water is currently subject to peroxide dosing. Lagoons are taken offline periodically (24 month intervals) to remove sludge by means of pumping.
The Coal Authority required a pair of bespoke baffles to be designed, manufactured and installed in a lagoon located at Lynemouth Mine Water Treatment Scheme. John F Hunt was employed to install the baffles to optimise the exisiting treatment process by:
- Increasing the residence time in the lagoon
- Improving the longitudinal mixing characteristics
- Optimise the reaction and settlement of ochre within the lagoon
Alongside our chosen contractor, we provided an engineered foundation solution for the baffle stanchions and installed two adjustable baffles across the lagoon. A total of fourteen 2050mm ground screws were installed quickly, safely and accurately, coupled to a bespoke stanchion base plate system.
The entire project was installed, tested, and completed within one day.