Two million aluminous alloy hubs were produced every year by an automotive hardware corporation.As a result,873 m³ wastewater was produced every day in this process,in which 80 m³ is acidic and,524m³ is alkalic;,181m³ contains zinc and copper;48 m³.contains chromium;and 40m³ contains nickel.During 30 days monitoring,pH,COD of wastewater,and the contents of nickel,zinc,chromium,copper and fluorid were range from 5.2 to 8.4,80.9 to 161.9 mg·L^-1,5.34 to 18.72 mg·L^-1,50.11 to 97.63 mg·L^-1,2.66 to 16.21 mg·L^-1,1.50 to 11.36 mg·L^-1,5.0 to 17.4mg·L^-1,respectively.The wastewater treatment plant could treat 1052 m³ wastewater per day,and each operated period lasted 20 hours.After 30 days operation,result showed that the system was relatively stable.The water quality of effluent could achieve the second discharge criteria of the provincial standard DB44/26-2001.