Abstract:

The combination of electrocoagulation and three-dimensional electrode was used to pretreat high-concentration p-cyanophenol wastewater. The results showed that the removal rates of COD, ammonia nitrogen and TP reached 35.69%, 49.9% and 55.32% respectively under the optimal electrocoagulation conditions of pH 8.0, current density 70 mA/cm², plate distance 1.5 cm and reaction time 30 min. The effluent of the electrocoagulation entered the three-dimensional electrode reactor. In the process of three-dimensional electrode treatment, the removal rates of COD, ammonia nitrogen and TP reached 81.57%, 66.63% and 56.71% respectively under the optimal conditions of current 8 A, pH 7.5-8.5 and reaction time 120 min. The high-concentration p-cyanophenol wastewater after pretreatment by this combined process has a greatly increased content of easily degradable organic matter and biodegradable organic matter, which is beneficial to the further treatment of wastewater.

Key words: electrocoagulation, three-dimensional electrode, p-cyanophenol wastewater

摘要：

采用电絮凝-三维电极组合工艺预处理高浓度对氰基苯酚废水，结果表明，电絮凝处理过程中，在pH为8.0，电流密度为70 mA/cm²，极板间距为1.5 cm，反应时间为30 min的优化条件下，COD、氨氮、TP的去除率分别达到了35.69%、49.9%、55.32%。电絮凝出水进入三维电极反应器，三维电极法处理过程中，在电流为8 A，pH为7.5~8.5，反应时间为120 min的优化条件下，COD、氨氮、TP的去除率分别达到了81.57%、66.63%、56.71%。经该组合工艺预处理后的高浓度对氰基苯酚废水，易降解有机物和可生物降解有机物含量大幅增加，有利于废水的后续深化处理。

关键词: 电絮凝, 三维电极法, 对氰基苯酚废水

CLC Number: 

• X703.1