This presentation focuses on the assessment of the Six Bells Mine Water Treatment Scheme in South Wales, near Abertillery. It examines the scheme's performance over the last two decades, particularly in terms of iron and manganese removal from mine water. The investigation suggests that the use of hydrogen peroxide may no longer be necessary, as the scheme has entered a "juvenile acidity" stage with decreasing contaminant concentrations. The presentation also discusses the scheme's components, such as the aeration cascade and settlement ponds, and highlights the potential for long-term passive remediation of the discharge.
