Patent ID: 7326340

Claim:
A wastewater odor control system comprising: a nitrate source disposed to introduce a nitrate species to a wastewater stream; a sensor disposed in the wastewater stream at a location downstream from a location of introduction of the nitrate source, and configured to transmit a signal corresponding to an ORP value of the wastewater stream, wherein a detention time of the wastewater system corresponds to a wastewater stream travel time between the nitrate source introduction location and the sensor location; and a controller disposed to receive the signal and configured to transmit a control signal to the nitrate source to adjust a rate of addition of the nitrate species introduced to the wastewater stream to effect a target ORP value in a range of about −75 mV to about +75 mV, and wherein the controller is further configured to transmit the control signal based on an ORP signal and the detention time.