覆膜粒子填料三维电极处理印染废水的研究

发布时间：2018-04-30 07:14

本文选题：三维电极 + 环氧树脂　；参考：《西南科技大学》2017年硕士论文

【摘要】：随着我国工业化的发展,印染废水的排放量日益增加并且逐渐成为工业废水排放的大户。印染废水处理问题逐渐成为摆在工业化进程面前的一道难题。本文以环氧树脂覆膜活性炭作为粒子填料对印染废水进行处理,得到了较好的处理结果。为充分利用三维电极系统的电流,本文先以不锈钢为电极系统的阴阳两极,考察了多种条件下自制三维电极系统的电流分布特性。实验结果表明,在电解效力相当的情况下,1)选择粒子填充量较小的系统、2)板间距较大的系统、3)电解质浓度较低的系统、4)废水p H值更接近于中性的系统,可以有效地降低系统的旁路电流及短路电流的产生,提高系统的电流利用效率。通过环氧树脂覆膜活性炭,得到覆膜均匀的绝缘覆膜粒子。在多种因素条件下对相同质量的玻璃珠填料与覆膜活性炭填料三维电极系统进行电解对比实验,发现覆膜填料优于玻璃珠填料。以覆膜粒子为填料,通过模拟废水实验对系统进行调试。在单因素实验中,覆膜活性炭-活性炭投加比1:3、板间距6 cm、电解电压20 V,电解质Na2SO4的量为2 g/L的条件下,在经过30 min电解之后该系统的去除效率可以达到94.48%。正交试验表明,在电解电压为25 V,板间距为6 cm,电解质Na2SO4的量为2 g/L,活性炭投加比1:4的条件下为最佳电解组合。经过30 min电解之后,亚甲基蓝的浓度得到有效降低,COD的去除率达到55.5%。利用该三维电极系统,对印染废水进行处理,结果表明在电解70 min之后,高浓度废水中的COD去除率达到51.6%,可生化性获得较大提高。低浓度废水中的COD去除率达到78.5%。
[Abstract]:With the development of industrialization in China, the discharge of printing and dyeing wastewater is increasing day by day. The treatment of printing and dyeing wastewater has gradually become a difficult problem in the process of industrialization. In this paper, epoxy resin coated activated carbon was used as particle filler to treat printing and dyeing wastewater, and better results were obtained. In order to make full use of the current of the three dimensional electrode system, the characteristics of the current distribution of the three dimensional electrode system under various conditions were investigated with stainless steel as the anode and cathode of the system. The experimental results show that under the condition of equal electrolytic efficiency, the pH value of waste water is closer to that of neutral system. It can effectively reduce the generation of bypass current and short circuit current, and improve the current utilization efficiency of the system. The uniform insulating coated particles were obtained by epoxy resin coated activated carbon. The electrolytic contrast experiments were carried out on the three dimensional electrode system with the same quality glass beads and coated activated carbon fillers under various factors. It was found that the coated film fillers were superior to the glass beads fillers. The system was debugged by simulated wastewater experiment with coated particles as filler. In the single factor experiment, under the conditions of adding ratio of 1: 3, plate spacing of 6 cm, electrolytic voltage of 20 V and electrolyte Na2SO4 of 2 g / L, the removal efficiency of the system can reach 94.48 after 30 min electrolysis. The orthogonal test shows that the best electrolysis combination is under the conditions of 25 V electrolysis voltage, 6 cm plate spacing, 2 g / L electrolyte Na2SO4 and 1:4 ratio of activated carbon. After 30 min electrolysis, the concentration of methylene blue can be effectively reduced by 55.5%. After electrolysis for 70 min, the removal rate of COD in high concentration wastewater reached 51.6, and the biodegradability was greatly improved. The removal rate of COD in low concentration wastewater was 78.5%.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X791

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