Zhu Gui-Bing, Peng Yong-Zhen, Wu Shu-Yun, Wang Shu-Ying
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
J Environ Sci (China). 2005;17(3):457-9.
Control of sludge age and mixed liquid suspended solids concentration in the activated sludge process is critical for ensuring effective wastewater treatment. A nonlinear dynamic model for a step-feed activated sludge process was developed in this study. The system is based on the control of the sludge age and mixed liquor suspended solids in the aerator of last stage by adjusting the sludge recycle and wastage flow rates respectively. The simulation results showed that the sludge age remained nearly constant at a value of 16 d in the variation of the influent characteristics. The mixed liquor suspended solids in the aerator of last stage were also maintained to a desired value of 2500 g/m3 by adjusting wastage flow rates.
在活性污泥法中，控制污泥龄和混合液悬浮固体浓度对于确保有效的废水处理至关重要。本研究建立了一种分段进水活性污泥法的非线性动力学模型。该系统基于分别通过调节污泥回流和排泥流量来控制最后一级曝气池中污泥龄和混合液悬浮固体。模拟结果表明，在进水特性变化时，污泥龄在16天的值附近基本保持恒定。通过调节排泥流量，最后一级曝气池中的混合液悬浮固体也维持在2500 g/m³的期望值。
