【作者】 胡海龙；

【导师】 郑正； 包伟国；

【作者基本信息】 复旦大学 ， 环境工程， 2011， 硕士

【摘要】 本文通过采用絮凝沉淀法和Fenton氧化法对某造纸厂废水进行深度处理。制备了10种组分不同的聚硅酸铝铁絮凝剂；研究了不同组分的絮凝剂及不同的反应条件对废水的处理效果的影响；研究了废水初始pH值、过氧化氢投加量、硫酸亚铁投加量和反应时间对废水CODcr和色度去除率的影响；通过设计正交实验进一步探讨了Fenton氧化法最佳的处理条件。主要结果如下：(1)将10种不同絮凝剂加入预处理废水中,随着投入量的增加,CODcr和色度的去除率均呈上升趋势。(2)制备的10种絮凝剂中,摩尔比为n(Si)：n(Al)：n(Fe)=1：1：2制备的絮凝剂絮凝效果最好,当其投加量量为300mg/L时,对CODcr和色度的去除率分别可达74.9%和84%。(3)当进水CODcr在600mg/L时,Fenton氧化处理的效果最好,但考虑到其他因素,经预混处理出水可直接作为Fenton氧化处理的进水,无需进行稀释,CODcr值为1050mg/L；(4)H2O2投加量、pH值、硫酸亚铁投加量是影响Fenton氧化处理处理效果的主要因素,反应时间对其也有一定影响。这些因素的主次关系为：H2O2投加量>pH>FeSO4投加量>反应时间；(5) Fenton氧化处理最佳运行条件为：H202溶液投加量为40 mL/L, pH值为4, FeSO4溶液投加量为80mL/L,反应时间为60min。以上结果表明采用絮凝沉淀法和Fenton氧化法联合工艺适合推广应用于造纸废水的深度处理工程,但仍需继续优化处理工艺,以降低运行成本。更多还原

【Abstract】 In this paper, the coagulation sedimentation and Fenton oxidation used to treat paper making wastewater are analyzed. In the research, the effects of coagulant type, coagulant dosage, pH, assistant coagulant dosage on the result of pre-coagulation treatment are inspected, and the effects of H2O2 dosage, pH, nFe2+/nH2O2, reacting time and other factors on the Fenton reagents oxidation treatment result are inspected. Finally, orthogonal experiments are used to determine the best values of the factors in Fenton oxidation processing units. The results indicated that:(1) With the increase of coagulant dosage, the removal efficiency of COD or chroma showed an increasing tendency.(2) The coagulation sedimentation system was operated as an efficient treatment system when the n (Si):n (Al):n (Fe) ratio was controlled at 1:1:3 resulting in highest average removal rates of both COD and chroma when the dosage of coagulators is 300mg/L.(3) The optimum operating conditions for Fenton oxidation is that the dosage of COD is 600 mg/L, the effluent from the pre-mixed processing is used for influent in Fenton oxidation without dilution.(4) The H2O2 dosage, pH, nFe2+/nH2O2, reacting time have great effect on the Fenton reagents oxidation treatment result. The major and minor relationship: H2O2>pH> nFe2+/nH2O2> reaction time.(5) The optimum operating conditions for Fenton reagents oxidation is that the dosage of H2O2 is 40 mL/L, the pH is 4, the dosage of FeSO4 is 80mL/L and the reacting time is in 60min around.The above results prove that coagulation and Fenton oxidation and flocculation process is an efficient process of paper making wastewater treatment. However, according this inclusion, a few of reasonable suggests are offered to reduce the cost of the paper making wastewater treatment.更多还原