Name

Aerated treatment wetlands as intensified Nature Based Solutions for CSO and stormwater treatment. Experience, case studies and opportunities for implementation through AMP 8

Speakers

Andy Freeman

Authors

Andy Freeman, Patrick Hawes and David Cooper, ARM Group, UK

Description

In the late 1990’s investigations to intensify conventional constructed wetland configurations to optimise treatment outcomes and efficiencies were being undertaken by wetland scientists and practitioners. The most successful and subsequently widely applied approach was to increase oxygen transfer using Forced Bed Aeration (FBA™): a process of artificially aerating the wetland media to accelerate biological degradation and optimise conditions for nitrification.

The technology was introduced into the UK wastewater treatment industry by ARM in 2008 with over 100 full-scale systems now in operation across the UK. These installations vary in size from small systems for a few PE to 2.04ha and have been mainly designed and implemented for secondary and tertiary treatment. With flexible aeration control, they are effective at managing large variable and intermittent flow and loads leading to implementation for CSO and stormwater treatment applications. Despite the addition of aeration, these systems have low power, maintenance, and carbon footprints when compared to M&E technologies and grey infrastructure.

In this study we will demonstrate the performance from UK aerated wetland systems as well as showcasing two large CSO wetland treatment schemes implemented by Scottish Water in Cowdenbeath and United Utilities in Chorley.

Time

12:00 PM - 12:25 PM

Location Name

Room 3

Track

11:20 - 14:55 Nature Based Solutions