The Application Research Of Activated Sludge Model No.1 In Wuxi Chengbei WWTP

At present, Activated sludge model has great value and can be used to improve the study, design and optimum operation of wastewater treatment around the world. It has been applied widely in the world. However, it is poorly established in the aspect of application of the modeling in China.In this paper, the application and calibration of Activated Sludge Model No.1 in the practical wastewater treatment plant had been implemented. The characterization and parameter of the outfluent from the rotational flow grit chamber had been measured in Wuxi Chengbei WWTP. The actual operation procedure is simulated in case of both steady and dynamic status using a simulation software named as WEST, which is from DHL Whereafter different simulation analysis is done to analyses the problems exist in this factory, and hence based on the analysis result, the optimized suggestion is arised.The result shows that the method of characterization and parameter in this paper can is practical. The heterotrophic yield coefficient Y_H, Heterotrophic max specific growth rateμ_max heterotrophic decay rate b_H readily biodegradable substrate Ss and slowly biodegradable substrate X_S could be characterized by the method of batch OUR respirometric experiments which is simple to calculate, and especially the outcome date is stable.The WEST software was used to simulate the real operation of the North WWTP in Wuxi city, the result show that using the combination of test mensuration and model calibration, good simulation results were achieved though changing of the model parameters. The modeling value of COD and NH4-N was proved to agree with the measurement.The results of research showed that, the activated sludge model which was promoted by the IAWQ can be used as a useful tool in operation management, technical improvement and scientific research in WWTPs. Nevertheless WEST software which was based on the activated sludge model could simulate the performance of activated sludge process and provide valuable advices for directing WWTPs, and it is worthy of carrying out a further research and extension in our country.