Patent ID: 8568590
Filing Date: 2013-10-29
Classification: C02F,Y02E,Y10S

Abstract:
1. A process for removing phosphates from wastewater containing phosphates, the process comprising the steps of: adjusting the pH of an organic acid digest to a value of no greater than 7 by adding a chemical selected from the group consisting of calcite, dolomite and magnetite or their claimed products—either oxides or hydroxides to the organic acid digest; and removing the precipitated phosphates from the organic acid digest in a controlled manner by either sedimentation, centrifugation, or filtration, wherein the controlled removal of the precipitated phosphates from the organic acid digest occurs after the organic acid digest has left an organic acid digester but before the organic acid digest has been sent to a thermophilic or mesophilic digester for the remainder of an anaerobic digestion process.