發(fā)布時間：2018-05-04 23:47

  本文選題：甲基橙 + 染料廢水　； 參考：《西南交通大學》2017年碩士論文

【摘要】：染料廢水普遍具有水量大、色度高、COD高、成分復雜、含有毒有害物質、可生化性差和處理困難等特點,屬于難處理工業(yè)廢水。染料廢水的處理仍是國內外水處理研究的熱點和難點。本論文以具有典型偶氮染料結構的甲基橙為處理對象,以COD去除率和脫色率為處理效果的評價指標。首先研究了以鐵板作為電極的電絮凝法對甲基橙模擬染料廢水的處理效果,確定了各影響因子的顯著性順序,并按該順序確定了本試驗條件下各因子的最佳值;然后研究了超聲波法對甲基橙模擬染料廢水的處理效果,確定了各影響因子的顯著性順序,并按該順序確定了本試驗條件下各因子的最佳值;最后將兩種方法組合成電絮凝-超聲波聯(lián)合法,確定了各影響因子的顯著性順序,并按該順序確定了本試驗條件下各因子的最佳值。電絮凝法的單獨試驗結果表明,5個主要影響因子的顯著性順序為:電解時間電解電壓電極間距初始pH初始濃度;在本試驗條件下,最佳試驗條件為:電解時間30min,電解電壓20V,鐵電極間距1cm,初始pH為5,初始濃度200mg/L左右,在此條件下脫色率最高可達98.45%,COD去除率最高可達65.09%。超聲波法的單獨試驗結果表明,4個主要影響因子的顯著性順序為:超聲功率初始pH初始濃度超聲時間;在本試驗條件下,最佳試驗條件為:超聲功率420W,初始pH控制在5左右,初始濃度200mg/L左右,超聲時間240min,在此條件下脫色率最高可達10.25%,COD去除率最高可達7.97%。電絮凝-超聲波聯(lián)合法試驗結果表明,4個主要影響因子的顯著性順序為:處理時間初始濃度電解質NaCl濃度初始pH;在本試驗條件下,最佳試驗條件為:處理時間20min,初始濃度200mg/L左右,電解質NaCl濃度1.5g/L,初始pH控制在5～6左右,在此條件下脫色率最高可達99.85%,COD去除率最高可達68.89%。通過對比分析可知,電絮凝-超聲波聯(lián)合法較單獨的電絮凝法、超聲波法對甲基橙染料廢水具有更高的處理效果。
[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.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：X788

【相似文獻】

相關碩士學位論文 前1條

1 田超威;甲基橙染料廢水預處理試驗研究[D];西南交通大學;2017年

，

本文編號：1845249