Removal and recovery of phosphate from wastewater by electrochemical induced calcium phosphate precipitation


Phosphate is an essential nutrient for life, unfortunately phosphate ore reserves in the world are diminishing. On the other hand, excess phosphate in wastewater can leads to water pollution, i.e., eutrophication.  Therefore, the removal and recovery of phosphate from wastewater would provide an excellent solution for both problems. The most common ways for removing phosphate are precipitation with iron/aluminum. They are effective but not sustainable, because phosphate in the iron and aluminum precipitates is hardly bio-available. Herein, an attempt to produce bio-available calciumphosphate by a novel electrochemical means is therefore suggested.