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超声—催化氧化—生物组合技术处理垃圾渗滤液的研究
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摘要
本研究中,以垃圾渗滤液为研究对象,在充分研究分析了以往的各种治理方法
    以及在“超声处理焦化废水”课题研究经验的基础上,采用了以超声催化氧化预处
    理-生物法后续处理的处理路线,兼顾了超声催化处理的高效和生物处理的低成
    本。
    在实验研究中,主要针对COD在37000~39000mg/L,氨氮在2800mg/L左右的
    垃圾渗滤液进行试验分析。试验的研究内容包括:(1) 超声辐照处理垃圾渗滤液研
    究。(2) 超声催化氧化处理垃圾渗滤液研究。(3) 对经超声催化氧化预处理的垃圾
    渗滤液进行生物处理研究。
    试验结果表明,单独采用超声辐照对垃圾渗滤液进行处理时,在声强为11. 94
    w/cm2、 声能密度为0. 110 w/cm3、 初始PH值为7、 并在反应过程中不控制PH值、
    温度保持在55℃、初始COD浓度为37000mg/L的条件下,经过240min超声辐照后,
    垃圾渗滤液中有机物的降解率达到81%,出水中有机物浓度下降到7000mg/L左右,
    对试验过程进行分析,证明超声辐照降解的作用机理是自由基氧化反应和高温热解
    反应两者兼而有之,反应符合一级反应动力学方程,当初始浓度37050mg/L时,其
    反应动力学方程为:C=36026. 14e0. 0042t,R2=0. 981。
    以硫酸亚铁作为催化剂,以活化铁屑作为微电解材料,在声强为11. 94 w/cm2、
    声能密度为0. 110 w/cm3,初始PH值为5. 5,投加FeSO4为0. 3mmol/L,并在反应过
    程中控制PH值保持在5. 5左右,初始浓度为37000mg/L的条件下,经过240min
    超声辐照后,垃圾渗滤液中有机物的降解率达到81%,此后对其进行氨氮吹脱,
    控制PH值为9. 5,温度为55℃时,氨氮的去除率为82%。
    经过超声催化氧化预处理后的垃圾渗滤液,进行后续生物处理,采用SBR工艺。
    
    
    昆明理工大学硕士学位论文
    摘要
    在进水0.sh,缺氧搅拌o.sh,曝气6~8h,缺氧搅拌3h,沉淀1h,出水0.5小时
    的反应周期中,MLSS为3500,污泥负荷为0.3kg/kg·d,曝气量为170L/h的条件
    下,生物法出水中COD达到400mg/L,氨氮达到34mg/L,出水符合国家三级排放标准
    (GB16889一1997)中有关COD和氨氮的排放限值。
The study target in this study is landfill leachate. After much study of all kinds of ways about treatment of landfill leachate, which we know, and based on the former researching of this project, we designed a combinatorial means of ultrasound, catalytic oxidation and bio-treatment, which show the two merit of ultrasound catalytic oxidation and bio-treatment.
    The property of landfill leachate in this experiment is 37000~39000mg/L of COD and 2800 mg/L of NH3-N. The content of experiment include: (1) the study of ultrasonic treatment of landfill leachate; (2) the study of ultrasonic catalytic oxidation of landfill leachate; (3) the study of bio-treatment through pre- treatment.
    with energy density of 11. 94 w/cm2, the initial PH value of 7, temperature of 55℃, initial concentration of organic components of 37000mg/L, through 240 min ultrasonic treatment, the experiment was capable of COD removal efficiencies exceeding 64% . the mechanism was dominated by the reactions between . OH radicals of the bulk solution and thermal decomposition in cavitations bubbles. The decomposition process is in line with the "equation of pseudo first-order kinetics. From my experimental data, I got a reaction
    rate equation:C=36026.14e0.0042t,R2=0.981.
    With catalyst of FeS04, microgalvanolysis material of activated iron-chipping, energy density of 11.94 w/cm2, PH value of 5.5, temperature of 55℃, initial concentration of organic components of 37000mg/L, through 240 min ultrasonic treatment, the experiment was capable of COD removal efficiencies exceeding 81% . with PH value of 9. 5, temperature of 55"C, the experiment of blowoff was capable of NH3-N removal efficiencies exceeding 82% .
    After the pre-treatment, the landfill leachate was treated by SBR. With the reaction phase : water intake of 0. 5h; anoxia stirring of 0. 5h, aeration of 6~8h; anoxia stirring of 0. 5h;water outtake of 0. 5h, MLSS of 3500, sludge load of 0. 3kg/kg.d, aeration volume of 170L/h, the effluent concentration of COD and NH3-N was around 34mg/L and 400mg/L, which accorded with the demand
    
    
    
    of GB16889-1997.
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