甲基橙染料废水预处理试验研究

发布时间：2018-05-04 23:47

本文选题：甲基橙 + 染料废水　；参考：《西南交通大学》2017年硕士论文

【摘要】：染料废水普遍具有水量大、色度高、COD高、成分复杂、含有毒有害物质、可生化性差和处理困难等特点,属于难处理工业废水。染料废水的处理仍是国内外水处理研究的热点和难点。本论文以具有典型偶氮染料结构的甲基橙为处理对象,以COD去除率和脱色率为处理效果的评价指标。首先研究了以铁板作为电极的电絮凝法对甲基橙模拟染料废水的处理效果,确定了各影响因子的显著性顺序,并按该顺序确定了本试验条件下各因子的最佳值;然后研究了超声波法对甲基橙模拟染料废水的处理效果,确定了各影响因子的显著性顺序,并按该顺序确定了本试验条件下各因子的最佳值;最后将两种方法组合成电絮凝-超声波联合法,确定了各影响因子的显著性顺序,并按该顺序确定了本试验条件下各因子的最佳值。电絮凝法的单独试验结果表明,5个主要影响因子的显著性顺序为:电解时间电解电压电极间距初始pH初始浓度;在本试验条件下,最佳试验条件为:电解时间30min,电解电压20V,铁电极间距1cm,初始pH为5,初始浓度200mg/L左右,在此条件下脱色率最高可达98.45%,COD去除率最高可达65.09%。超声波法的单独试验结果表明,4个主要影响因子的显著性顺序为:超声功率初始pH初始浓度超声时间;在本试验条件下,最佳试验条件为:超声功率420W,初始pH控制在5左右,初始浓度200mg/L左右,超声时间240min,在此条件下脱色率最高可达10.25%,COD去除率最高可达7.97%。电絮凝-超声波联合法试验结果表明,4个主要影响因子的显著性顺序为:处理时间初始浓度电解质NaCl浓度初始pH;在本试验条件下,最佳试验条件为:处理时间20min,初始浓度200mg/L左右,电解质NaCl浓度1.5g/L,初始pH控制在5～6左右,在此条件下脱色率最高可达99.85%,COD去除率最高可达68.89%。通过对比分析可知,电絮凝-超声波联合法较单独的电絮凝法、超声波法对甲基橙染料废水具有更高的处理效果。
[Abstract]:Dye wastewater has the characteristics of large water quantity, high chroma and COD, complex composition, toxic and harmful substances, poor biodegradability and difficulty in treatment, etc. It is difficult to treat industrial wastewater. The treatment of dye wastewater is still a hot and difficult point in water treatment research at home and abroad. In this paper, the methyl orange with typical azo dye structure was used as the treatment object, and the COD removal rate and decolorization efficiency were taken as the evaluation index. Firstly, the treatment effect of methyl orange simulated dye wastewater by electroflocculation with iron plate as electrode was studied, and the significant order of each influencing factor was determined, and the optimum value of each factor was determined according to this order. Then, the treatment effect of methyl orange simulated dye wastewater by ultrasonic method was studied, and the significant order of each influencing factor was determined, and the optimum value of each factor was determined according to this order. Finally, the two methods are combined to form an electroflocculation-ultrasonic method to determine the significant order of each influencing factor, and the optimum value of each factor under this experimental condition is determined according to this order. The results of the electroflocculation test show that the significant order of the five main influencing factors is the initial pH concentration of electrolytic time electrolytic voltage electrode spacing. The optimum conditions are as follows: electrolysis time 30min, electrolysis voltage 20V, iron electrode spacing 1cm, initial pH 5, initial concentration 200mg/L, and the highest decolorization rate can reach 98.45%. The results show that the significant order of the four main influencing factors is: ultrasonic power initial pH initial concentration ultrasonic time, under this test condition, the ultrasonic power is 420 W, the initial pH is about 5, When the initial concentration of 200mg/L was about 240 min, the highest decolorization rate could reach 10.25% and the highest removal rate was 7.97%. The results of the combined electroflocculation-ultrasonic test showed that the significant order of the four main influencing factors was as follows: initial treatment time, initial pH of electrolyte NaCl concentration, The optimum conditions are as follows: the treatment time is 20 minutes, the initial concentration of 200mg/L is about 1.5 g / L, the initial pH is about 5 ~ 6, and the highest decolorization rate can reach 99.85% and 68.89% respectively. Through comparison and analysis, it can be seen that the combined electroflocculation-ultrasonic method has a higher treatment effect on methyl orange dye wastewater than the single electroflocculation method.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X788

【相似文献】