In order to reduce the impact of heavy metals on the biological treatment system of electroplating wastewater,a lab-scale process combined with hydrolysis reactor and membrane bioreactor( MBR) was used to treat electroplating wastewater. Taking Cu~(2+)and Ni~(2+)as research objects, the effects of different metal concentrations on the electroplating wastewater treatment were studied,and the changes of DOMs and microbial activity in water were analysed simultaneously. The experimental results showed that the...