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发明授权
CN102070240B 二步湿法腈纶废水生物膜处理方法 失效 - 权利终止

二步湿法腈纶废水生物膜处理方法
摘要：
本发明涉及一种二步湿法腈纶废水生物膜处理方法，采用缺氧反应和好氧反应。本发明能将COD 500～1000mg/L、NH4-N 75～100mg/L、DMAC50～100mg/L、丙烯腈0～120mg/L、pH 6.0～9的DMAC二步湿法腈纶废水处理到COD≤250mg/L、NH4-N≤4mg/L、DMAC≤2mg/L、丙烯腈≤2.0mg/L、pH＝6.0～9。其优点是剩余污泥少、工艺流程短，除了适用于DMAC为溶剂的二步湿法纺丝生产混合废水处理外，也适用于其他溶剂纺丝生产废水、含丙烯腈物质废水以及部分印染、纺织和石化废水。
摘要（英）：

The invention relates to a biomembrane treatment method of two-step wet-spun acrylic fiber wastewater. In the method, anaerobic reaction and aerobic reaction are adopted. Being treated by the method, the DMAC two-step wet-spun acrylic fiber wastewater, originally having the following technical indexes: 500-1,000mg/L of COD (chemical oxygen demand), 75-100mg/L of NH4-N, 50-100mg/L of DMAC (dimethyl acetamide), 0-120mg/L of acrylonitrile and pH of 6.0-9, have the following technical indexes: not more than 250mg/L of COD, not more than 4mg/L of NH4-N, not more than 2mg/L of DMAC, not more than 2.0mg/L of acrylonitrile and pH of 6.0-9. The method provided by the invention has the following advantages: the excess sludge is less, the process flow is short, and the method is suitable for treating the mixed wastewater in the two-step wet spinning production taking DMAC as a solvent as well as for treating the wastewater in spinning production adopting other solvents, the wastewater containingacrylonitrile and partial printing and dyeing, spinning and petrochemical wastewater.

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