矩形与圆形结构稳定表流湿地比较研究

COMPARATIVE RESEARCH ON THE RECTANGULAR AND CIRCULAR STRUCTURE STABLE SURFACE FLOW WETLAND

在低温条件下,研究了矩形与圆形结构稳定表流湿地(矩形推流稳定表流湿地、矩形折流稳定表流湿地、圆形推流稳定表流湿地、圆形折流稳定表流湿地)对生活污水的处理效果差异及其影响因素。结果表明,水温为0～12.3℃,水力负荷为0.27 m3/(m2.d)时,圆形折流稳定表流湿地对各种污染物的平均去除效果最好。在不同的水力停留时间(1、2、3、4 d)下,圆形折流稳定表流湿地对COD的平均去除率分别为74.95%、85.12%、81.73%和83.44%;对TP的平均去除率分别为63.38%、68.49%、71.97%和78.49%;对NH3-N的平均去除率分别为11%、12.25%、13.82%和12.6%;对浊度的平均去除率分别为87.93%、89.09%、90.79%和92.25%。池体形状、池内结构以及水力停留时间是影响不同结构稳定表流湿地对生活污水处理效果及其差异的主要因素。

In the condition of low temperature,this paper studied treatment effect differences and influencing factors of the rectangle and circular stable surface flow wetland（rectangular push flow stable surface flow wetland,rectangular baffle flow stable surface flow wetland,circular push flow stable surface flow wetland,circular baffle flow stable surface flow wetland） to domestic sewage.The result showed that the average removal efficiency of the circularbaffleflowstablesurfaceflowwetlandwasthebestwhenthe temperature ofwater was0 to 12.3℃ and the hydraulic loadingwas0.27 m3/（m2.d）.In the condition of the circular baffle flow stable surface flow wetland,it was been setted in different hydraulic retention time for 1,2,3,4 d,its average removal rate of COD were 74.95%,85.12%,81.73% and 83.44%,respectively,average removal rate of TP were 63.38%,68.49%,71.97% and 78.49%,respectively,average removal rate of NH3-N were 11%,12.25%,13.82% and 12.6%,respectively,average removal rate of turbitidywere 87.93%,89.09%,90.79% and 92.25%,respectively.Pool shape,internal structure of pool and hydraulic retention time were the main influencing factors for treatment effection of difference structure stable surface flow wetland to domestic sewage.