Patent ID: 7563373
Filing Date: 2009-07-21
Classification: C02F,Y02W,Y10S

Abstract:
1. A process for lowering the concentration of total phosphorus in wastewater discharged from a settling chamber to a level below about 0.03 milligrams per liter comprising: a) treating the wastewater by adding to said wastewater a suitable amount of aluminum-based coagulant/flocculent for precipitation of phosphorus in said wastewater, the wastewater having a pH of about 4.5 to 6.4 during such treatment, to provide an eventual effluent stream of wastewater with precipitated aluminum-based, phosphorus-containing flocs dispersed in said wastewater; and b) filtering said precipitated aluminum-based, phosphorus-containing flocs from said eventual effluent stream of wastewater to lower the concentration of total phosphorus in the effluent stream of treated wastewater to a level below about 0.03 milligrams per liter.