Design and operation of wastewater treatment plant for aluminous alloy hub production
TAN Xiao1,2, QU Yan-fen2
1. South China Institute Environmental Sciences, Guangzhou 510655; 2. Department of Environmental Engineering, Jinan University, Guangzhou 510632, China
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.
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