回流对上流式厌氧滤器有机物去除率影响的预测

Prediction of Recycle Effect on the Effluent COD Concentration of an Upflow Anaerobic Filter

出水回流对上流式厌氧滤器的影响非常复杂 .本文报道一种通过数学模型预测回流对厌氧滤器有机物去除效率影响的方法 .该模型表明 :对于给定的废水有机物浓度和水力负荷存在一个最佳回流比rmax,它对应于回流条件下的最大COD去除率 ;当回流比大于rmax,而小于rt(阈值回流比 )时 ,有机物去除率随着r的增加而减小 ,但仍大于无回流时的COD去除率E0 ;当回流比等于rt 时 ,此时的COD去除率等于E0 ;而当rt 进一步增大时 ,回流将导致COD去除率下降至E0 之下 .模型还表明 ,最佳回流比rmax和阈值回流比rt 都随着原废水有机物浓度的增加而减小 ,且在高浓度条件下一旦回流比超过rt 后 ,滤器有机物去除率急剧下降 .

The action of effluent recycle on an upflow anaerobic filter is very complex. In this study one model, established through linear regression analyses of experimental results from an anaerobic filter without recycle, was modified and used to predict the effect of recycle on the effluent quality of the anaerobic filter. The model suggested that the effect of recycle on the anaerobic filter treating soybean processing wastewater is complex. For a given input chemical oxygen demand (COD) concentration and hydra...