Abstract
The application of digital computer control to municipal wastewater treatment processes is steadily gaining popularity. Within the next few years this mode of control is expected to become a standard feature of larger wastewater treatment plants. The purpose of this paper is threefold: first, to acquiant those outside the wastewater industries of the general concepts of wastewater treatment so they may appreciate some of the requirements imposed on the control computer; second, to present the overall control laws that regulate the feedback control of pure oxygen activated sludge and anaerobic digestion processes; and third, to describe the control system architecture and present the general philosophy of on-line closed loop control of Metro Denver's high purity oxygen activated sludge process.
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