Abstract:

In the process of anaerobic digestion wastewater treatment, various uncertain factors such as dynamically changing influent components, component concentrations, and coupling between components, make simple closed-loop control unable to obtain ideal wastewater treatment effects. In order to obtain satisfied effluent quality, a control technique, which is of fast response and less dependent on a process model, robust enough to disturbances, is able to satisfy the requirements of the control engineering. For the sake of achieving satisfied regulation, a disturbance rejection control, which estimates and cancels out the disturbance actively, is designed to regulate the output pollution level. The control technique utilized is capable of estimating and cancelling out uncertainties in the anaerobic digestion wastewater treatment process effectively. For the power of the control technique, the output pollution can be guaranteed in a desired level. Numerical results show that, the disturbance rejection control is robust enough to disturbances, and the closed-loop system performance can be guaranteed. It may be a feasible approach in the wastewater treatment process.

Key words: wastewater, anaerobic, digestion treatment processes, disturbance rejection, control

摘要：

厌氧消化废水处理过程中，动态变化的进水组分、组分浓度，组分间耦合等各种不确定因素，使得简单的闭环控制无法获得理想的污水处理效果。为使污水处理出水水质达标，对污水处理过程模型依赖小、对各种变化（扰动）因素鲁棒性强、动态响应好的控制方法可满足工程要求。为此，设计一种能够主动估计并消除扰动的抗扰控制方法，有效估计并补偿污水处理过程中存在的各种不确定因素，以获得期望的污水处理效果。数值仿真结果表明，抗扰控制具有较好的抗干扰能力，能够满足控制要求，是一种可行的污水处理控制方案。

关键词: 废水, 厌氧, 消化过程, 抗扰, 控制