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A/O-生物膜系统处理煤化工废水

Keywords: 聚氨酯载体,A/O-生物膜,煤化工废水,低温

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Abstract:

通过在传统A/O工艺好氧池投加聚氨酯填料组成A/O-生物膜复合工艺,建立了一套中试系统,以探讨处理实际煤化工高氨氮工业废水的可行性。结果表明该复合工艺具有很好的抗冲击负荷能力,并且在低温条件下仍能维持很高的去除效果。在温度为10℃以上、进水COD浓度为350~1100mg/L、氨氮浓度为80~280mg/L时,出水COD和氨氮浓度始终维持在60和10mg/L以下,去除率分别可达到90%和95%以上。低温对系统中悬浮污泥活性的影响比生物膜更大。常温条件下(20℃)生物膜的COD和氨氮降解速率分别为悬浮污泥的1.4和2.5倍,低温条件下(10℃)分别为3.1和3.0倍。

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