活性污泥沉降速率模型的研究进展

活性污泥沉降速率是二沉池模型的核心内容,以固体通量理论为基础的沉降速率模型主要包括幂函数模型、指数模型、Cho模型、双指数模型和颗粒分类沉降模型。在二沉池模拟中,指数模型和双指数模型较为实用且应用较多。指数模型的参数估计可通过模型参数与SVI关联实现,而双指数模型的参数则需将批沉降试验与最优化技术相结合才能确定。对活性污泥沉降速率模型的进一步研究工作提出展望。

Research Progress on Settling Velocity Models of Activated Sludge

Settling velocity of activated sludge is the core content of secondary clarifier model. The settling velocity models based on solid flux theory mainly include power model, exponential model, Cho model, double exponential model and component fraction settling model. The exponential model and double exponential model were the most practical and applied models for secondary clarifier simulation. As for parameter estimation, the correlation between model parameters and SVI was chiefly used for exponential model, while the combination of batch settling test and optimization technique was usually adopted for double exponential model. Finally, the key points for further research were put forward.