Products and Installation
We have maintained and installed progressively improved aeration systems in Bristol Water's reservoirs over the last forty years.
Blagdon is a man made reservoir of 217 hectares with the water supplied from surrounding farmland by various streams and has had four aeration systems in the following sequence:
1971 - 81: originally there was a simple air curtain, using 63mm diameter black MDPE airline, laid in the shape of an equilateral triangle. This was later improved by laying an aerator inside the triangle.
1995 - 97: Our diving survey showed the outer leg of the triangle was broken in several places. The damaged leg was removed and an aerator placed at the end of each leg, leaving the previous aerator between them. A further aerator was added later.
2001 - 2: All old aerators and air lines were removed from the Reservoir and five new Aquaerators were laid at distances of 200m, 250m, 400m, 600m and 850m from the dam Outlet Tower in the deepest areas.
2007 -8: It was discovered that the main water outlet was 2m below the Reservoir bed, thus water going to the Treatment Works, had a low DO and previous reports showed that in July each year there were large quantities of manganese in the water column.