UASB反应器反硝化处理对氨基二苯胺生产废水

摘要

The p-Aminodiphenylamine(i.e.RT base,a kind of rubber auxiliary) production wastewater was treated by UASB process.The experimental results show that:At the start-up stage (1-16 d),the removal rate of COD is decreased from 60.8％ to 24.2％,and that of TOC from 75.6％ to 37.2％; During the 16-50 d of running,the COD removal rate is increased gradually; After 50 d of running,the removal rates of COD and TOC are 69.4％ and 90.0％ respectively.Under the conditions of influent COD volume load less than 6 kg/(m3 · d),the removal rates of COD,TOC and NO3-N are 42.7％-69.4％,58.0％-90.0％and nearly 100％ respectively.When the ratio of TOC to TN is 2.0 and the influent pH is adjusted to 4.5,the reaction temperature(in the range of 18-34 ℃) has little effects on the treatment.The removal rates of the benzene compounds follow the order of paranitrophenol ＞phenol＞anilin.%采用UASB工艺处理橡胶助剂对氨基二苯胺(RT培司)生产废水.实验结果表明:UASB启动初期(1～16d),COD去除率由60.8％降至24.2％,TOC去除率由75.6％降至37.2％；UASB运行16 ～50 d,COD去除率逐渐提高；运行50 d时COD去除率为69.4％,TOC去除率高达90.0％.在进水COD负荷不超过6 kg/(m3·d)的条件下,UASB对COD的去除率为42.7％～69.4％,TOC去除率为58.0％～90.0％,NO3-N去除率接近100％.本实验最佳进水TOC与TN比为2.0,UASB进水pH可调节为4.5左右,反应温度为18～34℃时对UASB反硝化处理效果影响不大.UASB对苯系化合物的去除率从高至低顺序为对硝基酚＞苯酚＞苯胺.