Vertical flow reedbeds
Cheshire County Council
ARM Ltd, Eco-tech Systems
In 2009 ARM, along with subcontractors Eco-tech Systems, installed a vertical flow reedbed at the Conway Centre on Anglesea. The system was designed to treat sewage from the Education Centre.
More than 21,000 children and adults attend the Centre each year and there are 420 beds on site making it one of the largest residential arts and educational centres in the UK.
The treatment solution had to be positioned near to the rear of the main accommodation building in line with the existing sewerage infrastructure, where there was limited available space.
The National Trust also specified that a specific distance be maintained from mature trees in this area. Trial pits were dug to establish the position of the existing effluent pipes. These were taken into consideration in the new treatment reed bed design and subsequently required minimal alteration.
Because there was little available land a passive vertical flow reed bed was selected as the most appropriate solution. This allowed ARM to adjust the dimensions of the bed to fit the available space.
ARM installed a 60m3 two-stage settlement tank, specified by others, followed by a bed of 440m2.
The reed bed treatment installation provided Cheshire County Council with an improved, robust and sustainable treatment solution for the Conway Centre. The reed bed also became a feature for the centre being used as an example of sustainable technology development and application for children and others attending courses.