湿干比对组合填料人工渗滤带除污性能的影响

Influence of wet/dry ratio on pollutants removal ability of artificial infiltration system with combined packing

湿干比作为人工渗滤系统的重要控制参数,影响系统的处理效果。采用模拟人工渗滤系统装置,研究不同湿干比对人工渗滤系统除污能力的影响,试验过程中测定了CODCr、NH3-N、NO2--N、NO3--N、TN、TP等指标的变化。结果表明,湿干比为3∶4时,人工渗滤系统的除污能力较湿干比为1∶6时略好,且能更快形成脱氮环境。对于人工渗滤系统而言,不是湿干比越小就越利于污染物去除,只有选择合适的湿干比,才既能保证系统内充分复氧,又能维持系统内的微生物群落对营养的需求。

As an important control parameter, wet/dry ratio affects the treatment effect of the artificial infiltration system. Using a simulation device of the artificial infiltration system to treat wastewater, the influence of wet/dry ratio on pollutants removal was investigated, and the changes of indexes such as CODa NH3-N, NO2-- N, NO3--N, TN, TP and so on during the experiment were monitored. The results showed that, the pollutants removal ability of the said system with a wet/dry ratio of 3 ： 4 was a little better than that with the ratio of 1 ： 6, and the nitrogen removal efficiency of it was also higher. Therefore, for the pollutants removal by artificial infiltration system, wet/dry ratio is not the smaller the better, only a proper wet/dry ratio can ensure both the full reoxygenation and the nutrition needs of the microorganism communities in the system.