Bishop Wilton wastewater treatment work's reedbed replacement project was undertaken in association with Eric Wright Water Ltd and Yorkshire Water. The project was part of a sustainability initiative by Yorkshire Water, costing £1.6m. The previous beds, while still offering nature-based wastewater treatment, weren’t equipped to treat high levels of phosphorus.

These were replaced with reactive media beds, which use natural materials, such as sand or gravel, and plants to reduce phosphorus levels in water. High phosphorus levels cause algae growth, over-subscribing the oxygen levels in the water and suffocating fish and aquatic life.

This solution, known as ARMPhos™, is an adaptable, low-maintenance system that offers an eco-friendly and lower-cost alternative to chemical dosing. Value engineering, a staple of ARM project design, ensured that the system was not unnecessarily complicated or expensive, which has the added benefit of shortening construction and maintenance time and costs.

The project was completed in October 2024 and is currently in operation.