以溶解氧作为SBR法处理含盐污水的计算机控制参数可行性研究

Feasibility on DO as the Control Parameter for SBR Process Treating Saline Wastewater Research on Computerized Control

采用SBR工艺处理含盐生活污水 ,研究了进水的盐度、DO浓度和有机物降解过程三者之间的关系 ,验证以DO作为SBR工艺处理含盐污水有机物降解过程中反应时间和过程控制参数的可行性。分别对经过无机盐驯化稳定运行的活性污泥系统和盐度冲击期间非稳定运行的活性污泥系统进行试验。结果表明 :在稳定运行期间 ,无论进水的盐度变化 ,还是进水的COD或曝气量变化 ,DO和有机物的降解都有很好的相关性。根据这种相关规律可以用DO间接地指示出有机物降解的程度并可以对反应进程进行预测 ,从而实现对反应过程进行控制。但是 ,在盐度冲击期间 ,DO与有机物降解不具有相关性。所以 ,要实现DO作为SBR处理含盐污水的计算机控制参数 ,必须保证盐度的稳定。

Saline wastewater was treated by SBR process. Relationships among influent salinity, DO concentration and the course of degradation of organic pollutants were investigated to verify the feasibility of using DO as the control parameter of operation process and reaction time of SBR when saline sewage was treated. The results indicated that during the steady stage the relationship under various salt loading conditions between DO concentration and organic matter degradation was steady and repeatable. According to the relationship, DO concentration can be used as the control parameter of organic matter degradation and predication to reaction can be made so as to control reaction process. However , during the salinity shock stage, there was not steady relationship between DO content and pollutant degradation. Therefore, influent salinity must be kept unvarying to realize using DO as the computer control parameter of SBR process treating saline wastewater.