This flagship project for Northern Ireland Water provides an environmentally-friendly solution to replacing the overloaded wastewater treatment works serving the village of Stoneyford to the northwest of Lisburn.
Having assessed conventional treatment options, we developed an Integrated Constructed Wetland (ICW) solution that uses a natural ecosystem to break down and treat pollutants. Based on processes that occur naturally within indigenous wetlands, 2 initial settlement ponds and 5 treatment ponds process wastewater through a complex integrated system in which water, plants, micro-organisms, the sun, substrate and air interact to improve water quality.
In addition to specialist surveys, hydraulic modelling and flood risk assessment, we also provided the detailed design and project management services to satisfy the onerous discharge consent standards set by the Environment Agency and guide the project through to planning approval.
As the first fully sustainable ICW in Northern Ireland, Stoneyford is now recognised as an industry leading example of how wastewater treatment can be integrated into a local indigenous ecosystem. The new facility is particularly suited to the rural location and, since construction, has matured to create a lush biodiverse habitat of different species of tall reeds, rushes, iris and sedges.
The project won a prestigious ‘Green Apple’ environmental award in 2015 for its “positive contribution to the local community and enhancement of the local ecosystem” and now processes wastewater for a 1,000 population equivalent catchment area in a fully sustainable, low cost, low energy and low maintenance alternative to the modern, high technology-based wastewater treatment solutions.