Patent ID: 7967990
Filing Date: 2011-06-28
Classification: C02F,Y02W,Y10S

Abstract:
1. A hybrid chemical/mechanical dewatering sewage treatment method for inactivating and removing pharmaceuticals in wastewater inflow streams and/or wastewater treatment plant process liquid streams comprising: a. diverting and oxygenating a portion of the wastewater inflow streams and/or conventional process liquid streams, not previously oxygenated, to oxidize chemical species including pharmaceuticals, which are inactivated by oxidation wherein the portion is greater than 0% and up to 100%; b. injecting SO c. holding the sulfur dioxide treated wastewater in the same vessel into which the sulfur dioxide was injected, or a separate detention vessel, at a pH between approximately 1.5 and 4.5, depending upon dwell time, until at least one of the following occur: d. mechanically separating and disposing of any solids from the wastewater inflow streams and/or process liquid streams from its chemically treated liquid fraction in accordance with a wastewater treatment plant's disposal permit requirements, e. raising the pH of the chemically treated liquid fraction to inactivate chemicals including pharmaceuticals that are inactivated by a pH in excess of 8, and f. lowering the pH of the chemically treated liquid fraction for discharge in accordance with a wastewater treatment plant's discharge permit requirements.