铝合金轮毂生产废水处理系统的设计和运行

Design and operation of wastewater treatment plant for aluminous alloy hub production

某汽车零部件有限公司年产汽车铝合金轮毂200万只，每天产生酸性废水80m^3、碱性废水524m^3、含锌含铜废水181m^3、含铬废水48m^3和含镍废水40m^3生产废水总产生量为873m^3·d^-1。废水总镍、总锌、总铬、总铜、pH、氟化物和COD．的变化范围分别是5．34-18．72mg·L^-1、50．11-97．63mg·L^-1、2．66-16．21mg·L^-1、1．50-11．36mg·L^-1．5．2，8．4、5．0-17．4mg·L^-1、80．9-161．9mg·L^-1。铝合金轮毂生产废水处理系统设计水量为1052m63·d^-1。每个处理周期的运行时间为20h。系统运行稳定，连续30d出水均能达到广东省地方标准《水污染物排放限值》（DB44／26．2001）第二时段二级标准。

Two million aluminous alloy hubs were produced every year by an automotive hardware corporation. As a result, 873 ms wastewater was produced every day in this process, in which 80 m^3 is acidic and, 524m^3 is alkalic;, 181m^3 contains zinc and copper; 48 m^3.contains chromium; and 40m^3 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 m^3 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.