内回流比对污水一体化组合工艺的影响

Effect of Internal Recycle Ratio on the Integrated Combination Process of Wastewater

在常温条件下,以实际生活污水为研究对象,在设定外回流比r=100%前提下,分别设定内回流比R=100%、200%、300%、400%,来研究内回流比的改变对一体化组合工艺有机物去除和脱氮除磷的影响。从而优化内回流比,并依此优化工艺参数,进一步确定一体化组合工艺参数及其处理效果,为生活污水处理提供有效的参考。结果表明,该组合工艺可实现有机物﹑氮和磷的同步去除。当内回流比在100%~400%之间变化时,内回流比对系统TN去除影响较大,对COD,TP去除影响较小,NH_4^+-N的去除基本不受内回流比的影响。TN去除率随内回流比的增大呈升高趋势,但升高幅度呈递减规律。

To investigate the effect that the change of the internal recycle ratio may have on the organic matters and nitrogen and phosphorus removal of the integrated combination process,the sludge reflux ratio is set as100%,and the internal recycle ratio is set as100%,200%,300%and400%respectively with domestic wastewater under normal temperature.so as to optimize the internal recycle ratio,and optimize the process parameters allordingly,to further determine the integrated combination process parameters and its treatment effect,and to provide an effective reference for domestic sewage treatment.Experimental results clearly show that COD,N and P can be simultaneously removed in this combined process.When internal recycle ratio changes between100%~400%,it influences TN most,COD and TP is tiny.There is no distinct relationship between the internal recycle ratio and the removal efficiencies of ammonia nitrogen.he removal efficiencies of TN increase with t he increasing of t he internal recycle ratio,however,t he rising rate is descending.