Study on a discrete-time dynamic control model to enhance nitrogen removal with fluctuation of influent in oxidation ditches

Water Research
Yanchen LiuZhiqiang Wang

Abstract

The aim of study was proposed a new control model feasible on-line implemented by Programmable Logic Controller (PLC) to enhance nitrogen removal against the fluctuation of influent in Carrousel oxidation ditch. The discrete-time control model was established by confirmation model of operational conditions based on a expert access, which was obtained by a simulation using Activated Sludge Model 2-D (ASM2-D) and Computation Fluid Dynamics (CFD), and discrete-time control model to switch between different operational stages. A full-scale example is provided to demonstrate the feasibility of the proposed operation and the procedure of the control design. The effluent quality was substantially improved, to the extent that it met the new wastewater discharge standards of NH(3)-N<5mg/L and TN<15 mg/L enacted in China throughout a one-day period with fluctuation of influent.

References

Dec 13, 2005·Environmental Technology·M FiterI Rodríguez-Rodal
Mar 15, 2006·Water Science and Technology : a Journal of the International Association on Water Pollution Research·U JeppssonP A Vanrolleghem

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