Biofiltration Media – Phosphate release or capture, plant growth, chloride impacts, and more!
Biofilters are rain gardens with underdrains that treat stormwater runoff from urban landscapes, especially where infiltration into shallow groundwater is infeasible or a concern. The biofilter media (e.g., sand, compost, peat, biochar), however, can release phosphate or limit plant growth, so stormwater professionals struggle to choose which media to use in biofilters. A four-year outdoor […]