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微电解与Fenton氧化联合降解印染退浆废水研究

Study on Degradation of Printing and Dyeing Desizing Wastewater by Micro-electrolysis and Fenton Oxidation

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【作者】 何威隋智慧

【Author】 HE Wei;SUI Zhihui;College of light chemical & textile Engineering, Qiqihar University;

【机构】 齐齐哈尔大学轻工与纺织学院

【摘要】 本研究采用改性微电解材料与Fenton氧化、混凝工艺联合处理印染退浆废水。研究结果表明:微电解/Fenton/混凝为最佳组合工艺,出水B/C为0.44。利用该工艺处理CODCr 5315 mg/L、PVA 0.68 g/L、B/C 0.10的印染退浆废水,废水pH调至4、微电解材料一次投加量465 g/L、停留时间60 min,并测定微电解出水Fe2+含量,以确定在最佳Fenton反应条件(n(H2O2)/n(Fe2+)=15∶1,pH=4,反应1 h)下30%H2O2投加量。将Fenton反应出水pH调至8,利用残余的Fe2+、Fe3+进行混凝沉淀30 min,然后生化3 d,印染退浆废水的CODCr去除率达到96.65%,PVA去除率达到86.76%,符合印染污水间接排放标准。

【Abstract】 In this study, modified micro-elect rolysis material, Fenton oxidation and coagulation process were used to treat printing and dyeing desizing wastewater. The results showed that microelectrolysis/Fenton/coagulation was the best combined process, and the effluent B/C was 0.44. This combined process was used to treat printing and dyeing desizing wastewater with CODCr5315 mg/L,PVA 0.68 g/L and B/C 0.10. The pH of wastewater was adjusted to 4, one-time dosage of micro-electrolysis material was 465 g/L and the residence time was 60 min, and the Fe2+ content of micro-electrolysis effluent was determined. The dosage of 30% H2O2 was determined according to the best Fenton reaction condition(n(H2O2)/n(Fe2+)=15∶1, pH=4, reaction time=1 h). The pH of Fenton reaction effluent was adjusted to 8, and the residual Fe2+ and Fe3+ were used for coagulation for 30 min,and then biochemical reaction was carried out for 3 d. The effluent CODCrremoval rate reached 96.65%, and PVA removal rate reached 86.76%, reaching the indirect discharge standard of printing and dyeing wastewater.

【基金】 黑龙江省高校基本科研业务费项目(135509314)
  • 【文献出处】 皮革与化工 ,Leather and Chemicals , 编辑部邮箱 ,2021年04期
  • 【分类号】X791
  • 【下载频次】87
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