The effects of trace cobalt on the anaerobic treatment of acrylic fiber wastewater was investigated by comparing the organic degradation, cumulative gas production, three-dimensional fluorescence spectrum and microbial growth in two treatments with and without cobalt in an anaerobic reactor. The results show that wilh the addition of 1. 0 mg/L cobalt, the removal rate of CODCr was 71.1% and the cumulative gas production was 22. 5 mL. When the concentration of cobalt exceeded 10 mg/L, the removal rate of C0Dcr became 20% and the cumulative gas production was 8.5 mL; However, in the treatment without application of cobalt, the removal rate of C0Dcr was 43. 1% and cumulative gas production was 10 mL. Therefore, proper addition of cobalt can promote anaerobic biodegradation in acrylic wastewater.%利用厌氧反应装置,以腈纶废水为处理对象,通过2组试验,对比了微量金属(Co)投加前后废水中有机物降解情况、累积产气量、三维荧光光谱图以及微生物生长情况,研究了微量Co对腈纶废水厌氧处理效果的影响.结果表明:当Co的投加浓度[以ρ(CoC12)计]为1.0mg/L时,CODCr去除率达71.7％,累积产气量达到22.5 mL；当Co的投加浓度超过10 mg/L时,CODCr去除率为20％左右,累积产气量8.5 mL,未投加Co元素的空白对照组CODCr去除率为43.1％,累积产气量为10 mL.显示微量Co对腈纶废水厌氧生物降解具有一定的促进作用.
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