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Model based control of enhanced biological and chemical phosphorus removal

Choiński D.

Archives of Control Sciences

1999

Vol. 9, no. 3/4

79-92

The paper deals with a process control technique for on-line adjustment of biological phosphorus removal ratio and controlling of aluminium salt participation for optimal biological and chemical removing of phosphorus. The paper presents a mathematical model of a real wastewater treatment plant with simultaneous biological removal of nitrogen and phosphorus and chemical participation of phosphorus by addition of salt. The model is based on Activated Sludge Model No. 2 and is calibrated for a real plant. Real-time simulators are used for a computer simulation of the wastewater treatment plant. Chemical participation in removing phosphorus is based on simulated effects of biological phosphorus removal and the Process-Model-Based Control (PMBC). On the basis of this method operational decisions can be evaluated.