Chemical phosphorus removal

Chemical phosphorus removal is a wastewater treatment method, where phosphorus is removed using salts of aluminum (e.g. alum or polyaluminum chloride), iron (e.g. ferric chloride), or calcium (e.g. lime). Phosphate forms precipitates with the metal ions and is removed together with the sludge in the separation unit (sedimentation tank, flotation tank, etc.).[1]

References
  1. Inc, Metcalf & Eddy (2003). Wastewater engineering : treatment and reuse (4 ed.). McGraw-Hill. p. 501. ISBN 0070418780.
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