减压蒸馏法处理抛光废水研究

发布时间：2018-02-22 09:30

  本文关键词： 抛光废水 蒸馏 减压蒸馏 浓缩 馏液　出处：《水处理技术》2017年06期 　论文类型：期刊论文

【摘要】：针对抛光废水因水质复杂、COD高、生化性差和处理成本高等特点,采用减压蒸馏法对抛光废水进行处理,探索消泡剂投加量对抛光废水消泡效果影响。结果表明:投加量1.0 g/L的消泡剂对抛光废水消泡效果明显;温度与真空度越高,馏液COD越大,选择温度为90℃、真空度为80 k Pa为较好蒸馏条件;馏液COD随着p H增大逐渐减小,p H为8时蒸馏效果较好,此时COD为285 mg/L;馏液COD随着浓缩比增大先减小再增大,以90%为浓缩体积比为宜;减压蒸馏初期与末期馏液COD较高,中期较低。减压蒸馏法在处理抛光废水方面具有投药量少、工序简单、成本低、无二次污染等优势。
[Abstract]:In view of the characteristics of high COD, poor biochemistry and high cost of treatment, the polishing wastewater was treated by vacuum distillation. The effect of defoamer dosage on the defoaming effect of polishing wastewater was investigated. The results showed that the defoamer dosage of 1.0 g / L defoamer had obvious effect on the defoaming effect of polishing wastewater, and the higher the temperature and vacuum degree, the greater the COD of distillate solution and the selection temperature was 90 鈩，

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