Multistage process for removal of phosphorus, fluoride, and arsenic species from water via complexation and solubility control

摘要

The present invention relates in general to a process of removing phosphorus in various forms of suspended solids or dissolved ions, fluoride, and arsenic impurities from water streams in a multi-stage procedure via the use of additives, pH control, and physical separation, resulting in a water stream with 50 ppb phosphorus, 3 ppm fluoride, and 1 ppm arsenic.