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超滤/反渗透双膜技术深度处理印染废水

Keywords: 超滤,反渗透,印染废水,回用,膜污染

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Abstract:

由于印染废水具有高盐度,可生化性差,使常规方法难于处理完全。采用超滤和反渗透双膜技术处理实际印染废水,考察了不同超滤膜对废水的预处理性能,研究了BW30和CPA2两种反渗透膜在不同操作条件下对印染废水的处理效果,并分析了相关膜通量下降的原因。结果表明,超滤能有效地去除废水浊度和大分子有机物,为反渗透提供良好的进水水质。两种反渗透膜的产水化学需氧量(COD)均小于10mg/L,电导率小于80μS/cm,其对有机物和盐的去除率分别可达99%和93%以上,显示该产水能回用于大部分印染工序。BW30膜产水水质稍好于CPA2,但通量低于CPA2。

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