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| |Proven phosphorus retention <br> Retained phosphorus is stable||May harm plants<ref>Logsdon SD, Sauer PA. Iron Filings Cement Engineered Soil Mix. Agron J. 2016;108(4):1753. doi:10.2134/agronj2015.0427.</ref> <br> Removal efficiency declines with increased concentration of incoming phosphorus | | |Proven phosphorus retention <br> Retained phosphorus is stable||May harm plants<ref>Logsdon SD, Sauer PA. Iron Filings Cement Engineered Soil Mix. Agron J. 2016;108(4):1753. doi:10.2134/agronj2015.0427.</ref> <br> Removal efficiency declines with increased concentration of incoming phosphorus |
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| ![[Red sand]] | | ![[Red sand or Iron-enriched sand]] |
| |Proven phosphorus removal <br> Also removes TSS||Poor orthophosphate removal in hypoxic or anoxic conditions | | |Proven phosphorus removal <br> Also removes TSS||Poor orthophosphate removal in hypoxic or anoxic conditions |
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| |Removes phosphorus, as well as TSS, fecal coliform bacteria and heavy metals <br> Non-leaching||1-3 year lifespan, after which the product is removed as solid waste <br> [http://www.abtechindustries.com/smart-sponge Proprietary] | | |Removes phosphorus, as well as TSS, fecal coliform bacteria and heavy metals <br> Non-leaching||1-3 year lifespan, after which the product is removed as solid waste <br> [http://www.abtechindustries.com/smart-sponge Proprietary] |
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| ![[Sorbtive media]]<sup>TM</sup> | | ![[Sorbtive Media]]<sup>TM</sup> |
| |High phosphorus removal efficiency||[http://www.imbriumsystems.com/Portals/0/documents/sm/brochures/Sorbtive%20Media%20Brochure.pdf Proprietary] | | |High phosphorus removal efficiency||[http://www.imbriumsystems.com/Portals/0/documents/sm/brochures/Sorbtive%20Media%20Brochure.pdf Proprietary] |
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| ![[Water treatment residuals]] | | ![[Water treatment residuals]] |
| |Waste product reuse||Quality control (capabilities depend on source, treatment methods, storage time, etc of WTR) | | |Waste product reuse||Quality control (capabilities depend on source, treatment methods, storage time) |
| |} | | |} |
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