间歇曝气铁碳微电解耦合人工湿地脱氮除磷研究

Study on Intermittent Aeration of Iron Carbon Micro-Electrolysis Coupling with Constructed Wetland for Nitrogen and Phosphorus Remove

在不曝气、间歇曝气和连续曝气3种条件下,对铁碳微电解耦合人工湿地和普通人工湿地去除生活污水中COD、NH4+-N、TN和TP的效果进行了对比研究。结果表明,掺杂铁碳对COD和氨氮的去除效果影响不大,其去除率都比较高,分别稳定在96%和98%以上。耦合人工湿地在3种曝气条件下,对TN的去除率较普通人工湿地分别提高24.05个、11.41个和18.45个百分点;对TP的去除率分别提高21.08个、16.98个和23.6个百分点,其中间歇曝气条件下去除率最高,故该耦合工艺以及间歇曝气均可显著提高湿地对TN以及TP的去除性能。

Under the conditions of non-aeration, intermittent aeration and continuous aeration, the removal efficiency of COD, NH4＋-N, TN and TP in common constructed wetland and coupled constructed wetland were compared. The results showed that the iron-carbon had little effect on the removal of COD and ammonia nitrogen, the removal rate was 96% and 98%, respectively, which was relatively high. Compared with the common constructed wetland, the removal rate of TN of coupled constructed wetland increased by 24.05%, 11.41% and 18.45% with three aeration conditions, respectively,and the removal rate of TP increased by 21.08%, 16.98% and 23.6%, respectively. The removal rate was the highest in intermittent aeration phase among the others. Therefore, the coupling process and intermittent aeration could significantly improve the removal performance of TN and TP.