The capacity of the industrial ef fluent from Zhenyi Electron Factory in Shenzhen is 154 cubic meters per day.The organic wastewater containing epoxy resin,butanolamine,colourant and filler has lowconcentration,and it is not highly biodegradable.For this wastewater,the supernatant liquid f rom set tling tank is treated by SBR process after coag ulation and sediment.The running results showthat the output water quality meet s first National Discharge Standard(GB8978 —1996).