Patent ID: 8361319
Filing Date: 2013-01-29
Classification: C02F,F28C,F28D,Y02W,Y10S

Abstract:
1. A wastewater treatment system comprising: wastewater comprising nitrogen-containing compounds; an anoxic zone comprising denitrifying bacteria; an aerobic zone comprising nitrifying bacteria, wherein the anoxic zone is coupled to the aerobic zone, and the wastewater flows from the anoxic zone to the aerobic zone or vice versa; and a fluidized bed heat exchanger positioned in the aerobic zone and configured to accept heat from a heat engine and to transfer the heat from the heat engine to the wastewater, wherein the fluidized bed heat exchanger comprises particulate media, and air provided to the aerobic zone fluidizes the particulate media, thereby scrubbing bacterial growth from portions of the fluidized bed heat exchanger.