Biologically and chemically mediated adsorption and precipitation of phosphorus from wastewater

Biologically and chemically mediated adsorption and precipitation processes offer a range of approaches for removing phosphorus (P) from agricultural, domestic and industrial effluents. Technologies implemented at full-scale include filtration by adsorbent media, such as steel slag, and recovery of phosphorus as struvite, which has been successfully commercialised as a fertiliser. Other promising technologies under investigation include P removal by polymers and nanomaterials as well as struvite formation by bacteria. There is a need to focus future research on improving the efficiency of P removal by adsorption and precipitation. This can be achieved by techniques such as regenerating filters, polymers and nanomaterials for renewed P removal. Research is also needed to optimise the fertiliser potential of struvite precipitates.

Figure optionsDownload high-quality image (339 K)Download as PowerPoint slideHighlights
► Phosphorus (P) ineffluent can be removed by biological/chemical-driven adsorption and precipitation.
► Phosphorus adsorption by filters and struvite formation are promising options in this field.
► Emerging adsorption approaches include P removal by polymers/nanomaterials.