两级混合稳定表流湿地处理生活污水

Two step hybrid stable surface flow wetland systems for domestic wastewater treatment

为了提高一级稳定表流湿地(stable surface flow wetland,SSFW)的出水水质,在单级稳定表流湿地后串联一级潜流人工湿地,构成两级混合稳定表流湿地(two steps hybrid stable surface flow wetland,TSHSSFW),研究气候变化对其净化效果的影响,并同一级潜流人工湿地(one step subsurface flow wetland,OSSFW)进行对比。研究表明,气候变化对TSHSSFW的COD和总磷去除率影响较小,去除率均在80%左右;而对氨氮和总氮的去除率影响比较大,夏季TSHSSFW的氨氮和总氮去除率分别为87.77%和77.74%,而冬季氨氮和总氮的去除率分别为54.07%和48.84%。相比单级潜流人工湿地(OSSFW),有SSFW作为前处理的潜流人工湿地对氨氮和总氮的去除率较高。

In order to improve the effluent quality of one step stable surface flow wetland （SSFW） for do- mestic sewage, one step subsurface constructed wetland was connected after single step stable surface flow wet- land, formed two step hybrid stable surface flow wetland （TSHSSFW） , and the effect of climate change to efflu- ent quality of TSHSSFW was discussed and compared with one step subsurface flow wetland （OSSFW）. The re- suits showed that climate changes have little effect on the removal rates of COD and total phosphorus, they all are approximately 80%. Conversely, the climate changes have strong effect for the removal of total nitrogen and am- monia, the removal rates of total nitrogen, ammonia of TSHSSFW were 87.77% and 77.74% in summer, and were 54.07% and 48.84% in winter, respectively. Compared with OSSFW, the removal rates of subsurface flow wetland have been improved under the condition of SSFW for ammonia and total nitrogen.