Development of multi-purpose activated sludge simulation system

近年来，活性污泥工艺要求进行除氮或除磷等高级处理，因此需要对这些工艺进行优化设计和控制。为此，我们需要能够正确预测过程行为的仿真模型。在本研究中，我们打算在IAWQ活性污泥模型2的基础上开发一个用于工艺设计和控制的活性污泥模型，该模型被认为是最可靠的活性污泥模型。主要研究课题包括：1)建立一个基本的模拟模型；2)使用不同污水处理厂的实际操作数据对模型进行校准；3)确定糖原（生物除磷系统中必不可少的细胞内储存聚合物）的衰变系数；4)估计缓慢可生物降解有机底物水解的动力学和速率。仿真系统的基本部分已经开发完成，但人机界面有待进一步开发，水解过程的详细动力学有待进一步研究。

Recent years, advanced treament like nitrogen or phosphate removal has been required in the activated sludge process, thus optimization of the desgn and control of these processes is now demanded. For that purpose we need simulation models which can predict the process behavior properly. In the present research, we intended to develop an activated sludge model to be used for process design and control based on the IAWQ Activated Sludge Model No.2, which has been recognized as the most reliable activated sludge model. Major research topics include : 1) development of a basic simulation model, 2) calibration of the model using actual operation data from different wastewater treatment plants, 3) determination of decay coefficient for glycogen-an essential intracellular storage polymer in biological phosphate removal systems and 4) estimation of kinetics and rate of slowly biodegradable organic substrate hydrolysis. Basic parts of the simulation system were developed, but human interface is to be furher developed and detailed kinetics of the hydrolysis process be investigated in the future.