深度处理聚氨酯废水系统工艺的探讨

Study on Advanced Treatment of Polyurethane Wastewater System Process

采用含有悬浮填料生化池、三维电氧化装置和填料吸附塔的处理系统对聚氨酯废水进行深度处理。其中,装填有亲水性填料的悬浮填料生化池内微生物菌群包括变形菌门、拟杆菌门、芽单胞菌门和酸杆菌门;三维电氧化装置上部设置有析氧电位为1.35 V vs Ag/AgCl的改性不锈钢电极,下部填装比表面积为345~411 m2/g的改性活性焦填料;填料吸附塔中装填比表面积为358~405 m2/kg的改性硅藻土填料。经过该系统深度处理,聚氨酯废水中COD含量下降99.3%,甲醛含量下降99.95%,丙酮含量下降99.89%。

Polyurethane wastewater was deep treated by the system containing a suspended packing biochemical tank,a three-dimensional electrooxidation device,and a packing adsorption tower.The microbial flora in the suspended packing biochemical tank with hydrophilic fillers included proteobacteria,bacteroidetes,blastomonas,and acidobacteria.The modified stainless steel electrode with an oxygen evolution potential of 1.35 V vs Ag/AgCl was installed at the upper part of the three-dimensional electrooxidation device.The modified active coke filler with a specific surface area of 345~411 m2/g was installed at the lower part.The packing adsorption tower loaded the modified diatomite filler with a specific surface area of 358~405 m^(2)/kg.After the advanced treatment by this system,the contents of COD,formaldehyde,and acetone in the polyurethane wastewater were relatively reduced by 99.3%,99.95% and 99.89%.