NBIAS系统去除氮磷效果的试验分析

Test and Analysis for Nitrogen and Phosphorus Removal in Non-Backflow Intermittent Aeration System

通过单因素和双因素正交试验对无回流间歇曝气系统(NBIAS)的工况与污水中有机物(COD)、总氮(TN)和总磷(TP)去除率之间的关系进行了研究,试验表明,以生活污水为原水,在曝气 停曝周期T=6.0h、缺氧时间为1.5h、厌氧时间为1.5h、沉淀排水时间为0.5h的条件下,曝气比和泥龄均高度显著地影响TP的去除,但曝气比的影响是泥龄影响的600倍。

Study was made on the Non-Backflow Intermittent Aeration System (NBIAS) to investigate the relation of the sludge retention time and other operational parameters with the removal rate of COD,total nitrogen (TN) and total phosphorus (TP).By means of single-factor test and double factors orthogonal test,better removal rate of COD,TN,and TP was obtained under the combined influence of aeration ratio and sludge retention time.The test result showed that by taking domestic sewage as influent and under the conditions of aeration period of 6.0 h,anoxic time 1.5 h,anaerobic time 1.5 h,and settling and drainage time 0.5 h,both the aeration ratio and sludge retention time will significantly affect TP removal,and the influence of aeration ratio is 600 times larger than that of sludge retention time.