废水中较高浓度的2，4－二氯酚（2，4－DCP）以溶解态和胶体2种形态存在。研究了间歇式电辅助微生物体系（IEMS）和连续式电辅助微生物体系（CEMS）对较高浓度2，4－DCP的还原降解效果。结果表明CEMS对溶解性2，4－DCP的降解符合零级反应动力学特征，动力学常数为0．245 h－1，对2，4－DCP降解中间产物邻氯酚（2－CP）和对氯酚（4－CP）的降解也为零级反应，动力学常数分别为0．048、0．0815 h－1。IEMS在停止电辅助期间对胶体态2，4－DCP的水解效率远高于CEMS，2个体系均为零级反应，动力学常数分别为0．0834、0．0271 h－1。较高浓度的2，4－DCP宜采用IEMS处理。%2,4-dichlorophenol(2,4-DCP) having higher concentration in wastewater exists in two states:dissolved and colloidal. The reduction and degradation effects of 2,4-DCP having higher concentration treated by an intermit-tent electro-assisted microbial system (IEMS)and a continuous electro-assisted microbial system (CEMS) have been studied. The results show that the degradation of the dissolved 2,4-DCP treated by the CEMS conforms to the zero-order kinetic characteristics and the kinetic constants is 0.245 h-1. For 2,4-DCP degraded intermediate products 2-CP and 4-CP,the degradation are also zero-order reaction. The kinetic constants are 0.048 h-1 and 0.081 5 h-1,respecti-vely. The hydrolysis efficiency of colloidal 2,4-DCP,while IEMS stops having electric auxiliary,is much higher than that of CEMS. The two systems are both zero-order reaction. The kinetic constants are 0.083 4 h-1 and 0.027 1 h-1, respectively.It is suitable for 2,4-DCP having higher concentration to be treated by IEMS.
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