农业灌溉再生水处理过程溶解氧控制研究

Dissolved oxygen control of reclaimed water for agricultural irrigation

为了使污水处理后的再生水可以安全的应用于农业灌溉,采用模型预测控制的方法对活性污泥法污水生物处理过程中的溶解氧进行有效控制。一般认为,溶解氧浓度在2 mg/L等级下,活性污泥过程去除有机污染物的效果最佳。通过Benchmark数据仿真验证,模型预测控制方法在响应速度、减小超调等性能上都要优于传统的PI控制方法,为保证再生水质指标达到灌溉标准有着现实指导意义。

In order to reclaimed water after sewage treatment can be safely used in agricultural irriga-tion, using model predictive control method for the effective control of dissolved oxygen activated sludge in biological wastewater treatment process. Generally, the concentration of dissolved oxygen at 2 mg/L levels of activated sludge process, the removal of organic pollutants is best. Through the Benchmark data simulation, the model predictive control method in response speed and reducing overshoot performance is better than the traditional PI control method, in order to ensure the water quality indicators have reached the standard of recycling irrigation has realistic guiding significance.