【摘要】 采用两组潜流人工湿地,通过渗透系数的定量分析研究了湿地堵塞的全过程,采取轮休措施后人工湿地堵塞的恢复效果,探讨了基质粒径、充氧、季节等不同工艺条件下的轮休效果。分析了人工湿地对污染物和SS的去除效果,揭示堵塞和轮休使堵塞解除的机理。结果表明:1堵塞发生是由于污染物的吸附堆积和微生物增殖导致有效孔隙的减小,最终形成滤层和滤饼,湿地堵塞主要发生在表层10cm,两组试验装置中表层堵塞物的量与第二层的比值分别是4.81、2.83;2湿地轮休时有效孔隙的恢复主要是堵塞物降解过程。主要受湿地溶氧条件的影响,堵塞解除主要表现为堵塞有机质的分解,冬季采取三个星期的轮休措施,湿地堵塞会得到良好的恢复。更多还原

【Abstract】 This paper is mainly to research the clogging process in the two subsurface-flow constructed wetlands depending on the quantitative analysis to the hydraulic conductivity,and its recovery effects after making them work by turn,different results while different sizes of the filler、aeration quantities were used in different season.Then,we analysis the removal effects to the pollutant and suspend solid(SS)to announce how the subsurface flow constructed wetlands were stopped and how the method made them recover.The results show :1.The clogging was resulted from the smaller and smaller effective hole since the accumulation of the pollutant when it was absorbed and the microorganism,finally,the filler was clotty.The clogging was happened 10 cm beneath the water surface,two units showed bulkhead on the first floor was 4.81 and 2.83 as mach as the second.2The recovery depended on the degradation of the bulkhead,and the weather affected it a lot,In winter,the method of working by turn for three weeks can insure a nice recovery of the effective hole.更多还原