Abstract:

In this study, ZVI/Fe²⁺/H₂O₂ Fenton-like process was used to treat the effluent from a secondary biological process in a papermaking-reconstituted tobacco slice mill. The effects of reaction time, initial pH, Fe²⁺ concentration, H₂O₂ concentration and zero-valent iron(ZVI) concentration on the removal of COD and color were investigated, respectively. The results showed that when the reaction time was 60 min, the initial pH was 5.0, Fe²⁺ concentration was 1.0 mmol/L, ZVI concentration was 2.0 g/L and H₂O₂ concentration was 10 mmol/L, the color and the COD after treatment were 84 C.U. and 73 mg/L, respectively, and their corresponding removal efficiencies were 95.5% and 80.4%, respectively. Compared with the traditional Fenton process, ZVI/Fe²⁺/H₂O₂ Fenton-like process has three advantages, weaker acidic condition(pH=5.0), less total iron demand(decrease 26%) and less Fenton sludge yield(decrease 2/3).

Key words: tobacco slice wastewater, zero valent iron, Fenton-like

摘要：

采用零价铁（ZVI）/Fe²⁺/H₂O₂类Fenton法深度处理造纸法烟草薄片废水（二级生化出水），探讨了反应时间、初始pH、Fe²⁺浓度、H₂O₂浓度和ZVI质量浓度对COD和色度去除效果的影响。结果表明，当反应时间为60 min、初始pH为5.0、Fe²⁺浓度为1.0 mmol/L、ZVI质量浓度为2.0 g/L、H₂O₂浓度10 mmol/L时，处理后色度为84 C.U.、脱色率为95.5%；COD为73 mg/L，COD去除率为80.4%。与传统Fenton法对比发现，ZVI/Fe²⁺/H₂O₂类Fenton法具有可在弱酸性条件下（pH=5.0）使用、总铁需求量少（减少26%）和产泥量少（减少2/3左右）的优点。

关键词: 烟草薄片废水, 零价铁, 类Fenton

CLC Number: 

• X703.1