添加剂对生物滴滤器处理高温苯系物气体的强化效果

Enhancement effect of additives on treatment of high temperature benzene series gases by biotrickling filter

为了探究高温条件下净化VOCs的可行性,对生物滴滤器处理高温苯系物气体进行了研究。以苯、甲苯、二甲苯为挥发性有机物,在高温条件下,通过实验选出最合适的添加剂及其添加浓度,探究了添加剂对生物滴滤器处理高温苯系物气体的强化效果。实验结果表明,在进气温度为60℃的条件下,选择的2种表面活性剂中吐温-20对苯系物气体的去除效果较好,选择的7种金属离子中Mn^(2+)的促进效果最明显。当进气口质量浓度为1 000 mg/m^3、停留时间为240 s时,添加50 mg/L的吐温-20和35 mg/L的Mn^(2+)使苯系物气体的去除效率达到最高,为91.7%,去除能力为14.9 g/(m3·h)。

In order to investigate the feasibility of purifying VOCs under high temperature conditions,the treatment of high temperature benzene series substances gases by biotrickling filter is studied.Using benzene,toluene and xylene as representatives of volatile organic compounds,the most suitable additive and its adding concentration are selected and determined by experiments under high temperature,and the enhancement effect of additives on the treatment of high temperature benzene series substances gases by biotrickling filter is studied. Experimental results show that under the condition that the temperature of inlet gases is 60 oC,the effect of Twain-20 surfactant on the removal of benzene series substances gases is better than another selected surfactant,and Mn^2＋exhibits the most obvious promotion effect among the seven selected metal ions.When the inlet concentration is 1 000 mg·m-3,the residence time is 240 s,the adding amount of Twain-20 is 50 mg·L^-1 and the adding amount of Mn^2＋is 35 mg·L^-1,the removal efficiency of benzene series substances gases can reach the highest,91. 7%,and the removal ability can be 14. 9 g/（ m^3/h）.