US 11,655,171 B2
Apparatus and method for electrochemical treatment of wastewater
Nicole Alice Poirier, Beaconsfield (CA); and Valérie Leveillé, Montréal (CA)
Filed by PROTERRGO INC., Montréal (CA)
Filed on Jun. 17, 2019, as Appl. No. 16/443,026.
Application 14/861,549 is a division of application No. 13/381,173, abandoned, previously published as PCT/CA2010/000930, filed on Jun. 23, 2010.
Application 16/443,026 is a continuation of application No. 14/861,549, filed on Sep. 22, 2015, abandoned.
Claims priority of provisional application 61/221,522, filed on Jun. 29, 2009.
Prior Publication US 2019/0300411 A1, Oct. 3, 2019
Int. Cl. C02F 9/00 (2023.01); C02F 1/463 (2023.01); C02F 1/465 (2023.01); C02F 1/467 (2023.01); C02F 1/76 (2023.01); C02F 1/461 (2023.01); C02F 103/00 (2006.01); C02F 103/08 (2006.01); C02F 1/32 (2023.01)
CPC C02F 9/00 (2013.01) [C02F 1/463 (2013.01); C02F 1/465 (2013.01); C02F 1/4674 (2013.01); C02F 1/76 (2013.01); C02F 1/32 (2013.01); C02F 2001/46138 (2013.01); C02F 2103/002 (2013.01); C02F 2103/005 (2013.01); C02F 2103/008 (2013.01); C02F 2103/08 (2013.01); C02F 2201/4614 (2013.01); C02F 2201/46135 (2013.01); C02F 2201/46175 (2013.01); C02F 2209/02 (2013.01); C02F 2209/04 (2013.01); C02F 2209/05 (2013.01); C02F 2209/06 (2013.01); C02F 2209/11 (2013.01); C02F 2209/245 (2013.01); C02F 2209/29 (2013.01); C02F 2209/40 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A process for treating wastewater comprising at least one of blackwater and graywater, the process comprising:
removing suspended solids in said wastewater using metal ions liberated by at least one metal anode electrode in an electro-coagulation unit and hydrogen gas bubbles by at least one cathode to coagulate contaminants and cause them to float and to form a froth, wherein most of total suspended solids and dissolved solids in said wastewater are removed as a froth in said electro-coagulation unit;
electro-oxidizing organic contaminants including any suspended solids and dissolved solids remaining in said wastewater discharged from said electro-coagulation unit using hydroxyl radicals generated at the surface of at least one boron doped diamond coated anode of an electro-oxidation unit, thereby converting said contaminants to a gas comprising hydrogen and carbon dioxide, without removal of any total suspended solids through floatation in said electro-oxidation unit, and discharging wastewater from said electro-oxidation unit into an oxidant removal unit; and
decomposing residual oxidants remaining in said wastewater using iron ions liberated by at least one iron electrode of said oxidant removal unit, thereby producing iron oxide particles that can be separated from said wastewater to generate effluent wastewater, wherein all treatment agents acting on said contaminants are generated in-situ, in said wastewater,
wherein said effluent wastewater is discharged to the environment directly from the oxidant removal unit.