Project introduction: L sanjin electronics co., LTD., production process using nickel plating process, produces the wastewater containing nickel, nickel ion is the first in the national wastewater discharge standard random discharge of pollutants is forbidden, because it can in the environment and animal and plant body enrichment, through the food chain cause long-term adverse effects on human health, so the waste water containing such substances, divisions and discharge way, also regardless of the function of receiving waters and categories, the maximum allowable emission concentration Ni2 + < 1.0 mg/L.