高盐低温双胁迫下人工湿地稳定运行技术研究

Stable Operation Technology of Constructed Wetland under Double Stress of High Salt and Low Temperature

人工湿地作为仿自然生态处理系统,其运行效果受外界环境因素影响较大,特别是在我国北方滨海地区,冬季低温必将造成湿地处理效率下降。通过在湿地中添加多通道生物填料探讨其对工业园区人工湿地中表面流人工湿地冬季运行的影响,结果显示,添加多通道生物填料后,对BOD5和COD的去除率由对照组的32%和21%增加到40%和30%;对TN和NH4-N的去除率由22%和25%增加到33.6%和35.4%;对TP的去除效率由对照组去除率的23%增加到28%;对总SS的去除效率由原来的20%增加到32%。说明冬季低温运行时可通过添加多通道生物填料提高湿地的去除能力。

As an imitation of the natural ecological treatment system, the operating efficacy of constructed wetland is greatly influenced by the environmental factors, especially in the coastal area of northern China. Low temperature in winter will result in the decrease of wetland treatment efficiency. The effect of the multi-channel biological filler was discussed on the winter operation of the surface flow wetland in the constructed wetland in the industrial park. The results showed that the removal rates of BOD5 and COD increased from 32% and 21% respectively in the control group to 40% and 30% after the addition of multiple channels. The removal rate of TN and NH4-N increased from 22% and 25% to 33.6% and 35.4%, respectively. The removal efficiency of TP increased from 23% to 28%. The removal efficiency of total SS increased from 20% to 32%. It is showed that the removal ability of wetland could be improved by adding multi-channel biological filler in winter at low temperature.