Patent ID: 7449113
Filing Date: 2008-11-11
Classification: C02F,Y02W

Abstract:
1. A method of controlling a biological wastewater treatment process, comprising: A. in at least one treatment tank containing wastewater and having associated therewith at least one device to supply an increasing and decreasing flow of oxygen-containing gas and/or wastewater into the tank, conducting a biological process wherein the need for oxygen in the process repeatedly increases and decreases during the process, B. supporting the process at least in part by introducing the oxygen-containing gas into the wastewater in the form of bubbles provided in the wastewater by a gas supply system, and causing at least a portion of the oxygen in the bubbles to dissolve in the wastewater and at least a portion of the dissolved oxygen to be consumed by the biological process C. controlling the operation of the biological process with a control system that, as the process operates, exercises continuing control over the process at least partially in response to D. utilizing said measurements and data to provide, in the control system, control values, which may be components of control values, and which include E. deriving, in the control system, utilizing said first and second control values, control signals for adjusting said at least one device.