Difference between revisions of "Filter Media Additives for Phosphorus Removal"
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Revision as of 19:37, 1 August 2017
A number of granular amendments have been demonstrated to improve nutrient removal from discharge water in BMPs such as bioretention cells, absorbent landscapes, sand filters or green roofs.
There are two primary processes involved, precipitation and adsorption. Both mechanisms are ultimately finite, but have been shown in come cases to make significant improvements on the discharged water quality over several years.
| Material | Benefits | Potential concerns |
|---|---|---|
| Biochar | - | Currently expensive Energy intensive to produce |
| Bold and GoldTM | Total Phosphorus removal upto 71%[1] | Proprietary |
| Iron filings (ZVI) | Proven phosphorous retention | May harm plants[2] |
| Red sand | Proven phosphorous retention | - |
| Sorptive mediaTM | Proven phosphorous retention | Proprietary |
| Water treatment residuals | Waste product reuse | Proprietary |
- ↑ Hood A, Chopra M, Wanielista M. Assessment of Biosorption Activated Media Under Roadside Swales for the Removal of Phosphorus from Stormwater. Water. 2013;5(1):53-66. doi:10.3390/w5010053.
- ↑ Logsdon SD, Sauer PA. Iron Filings Cement Engineered Soil Mix. Agron J. 2016;108(4):1753. doi:10.2134/agronj2015.0427.