阴阳电极微电解填料预处理吡啶废水的研究

发布时间：2018-11-25 14:07

【摘要】：针对4,4'二氨基二苯乙烯-二磺酸(DSD酸)生产过程中产生的工业铁泥的污染问题,利用DSD酸工业铁泥为原料制成新型DSD酸铁泥阴阳电极微电解填料,并将其利用于吡啶废水的预处理。按照国标法测得新型阴阳电极微电解填料的物理性质,利用扫描电镜对填料的表面和截面结构性质进行研究。通过进行单因素实验探究新型阴阳电极微电解填料处理吡啶废水的效果与可行性,根据吡啶废水处理过程中吡啶的去除效率、总有机碳(TOC)的去除效率,进行结果讨论。采用单因素实验法,进行水平因素影响分析,优化实验条件。通过串联反应器和外加电极进行强化处理效果实验,提高污水的处理效率。以DSD酸生产过程中产生的工业铁泥为原料制得的阴阳电极微电解填料具有较大的比表面积(29.89m2/g)、其堆积密度(921 kg/m3)和颗粒密度(1086 kg/m3)较小,值得注意的是该填料具有较高得吸水率(25%)和空隙率(43%),具有很好的吸水性,很大程度上提高了污水与填料的接触效果。通过填料的扫描电镜结果可得,填料表面粗糙,有很多球状突起,截面有许多孔状结构。通过单因素实验探究不同pH、水力停留时间(HRT)、气液比(A/L)、吡啶初始浓度对于阴阳电极微电解填料处理吡啶废水效果的影响,可得在最优条件下(pH=3、HRT=6h、A/L=2),吡啶和TOC去除率可达到58%和50%。通过液质联用探测结果表明,吡啶在微电解作用下环状结构被破坏,降解为小分子物质。采用串联反应器来提高阴阳电极微电解填料处理效率,通过调节一级出水pH,可使处理效果提高一倍。通过外加直流电场来提高阴阳电极微电解填料处理效率,吡啶和TOC的去除效率可达到65%和55%,其填料的利用率得到提高。在探究填料稳定性实验中,填料连续处理污水一个月。未出现板结现象,填料状态良好。在吡啶废水处理整个过程中,填料使用六个月仍未发现板结现象,相对传统的微电解技术,其填料的使用寿命被抗板结能力大大提高。综上所述,利用DSD酸工业污泥为原料制成的新型阴阳电解微电解填料,具有良好的抗板结性能。在预处理吡啶废水过程中,在最优实验条件(pH=3、HRT=6h、A/L=2)下,吡啶和TOC的去除率可达到58%和50%。另一方面填料稳定运行一个月未出现板结现象,增加了其使用寿命。
[Abstract]:Aiming at the pollution of industrial iron slime produced during the production of 4'4 'diaminodistyrene-disulfonic acid (DSD acid), a new type of DSD ferric acid slime anode microelectrolytic filler was prepared by using DSD acid industrial iron sludge as raw material. It was used in the pretreatment of pyridine wastewater. According to the national standard method, the physical properties of the new type of anode and cathode electrode microelectrolytic filler were measured. The surface and cross-section structure properties of the filler were studied by scanning electron microscope (SEM). The effect and feasibility of treating pyridine wastewater with new type anode electrode microelectrolytic filler were investigated by single factor experiment. The results were discussed according to the removal efficiency of pyridine and the removal efficiency of total organic carbon (TOC) in the process of treatment of pyridine wastewater. Single factor experiment method was used to analyze the influence of horizontal factors and optimize the experimental conditions. In order to improve the efficiency of sewage treatment, series reactor and external electrode were used to enhance the treatment effect. The anode and cathode electrode microelectrolytic filler produced from industrial iron sludge produced during the production of DSD acid has a large specific surface area (29.89m2/g), and its bulk density (921 kg/m3) and particle density (1086 kg/m3) are smaller. It is worth noting that the filler has a high water absorption rate (25%) and a high porosity (43%). It has a good water absorption and greatly improves the contact effect between the sewage and the filler. The results of SEM show that the packing surface is rough, there are many spherical protrusions, and the section has many pore structures. The effects of different (HRT), gas / liquid ratio (A / L) of pH, hydraulic retention time and initial concentration of pyridine on the treatment of pyridine wastewater with anode and cathode electrode microelectrolytic filler were investigated by single factor experiment. The optimal conditions (pH=3,HRT=6h,) were obtained. The removal rates of pyridine and TOC can reach 58% and 50% respectively. The results of liquid-mass spectrometry showed that the ring structure of pyridine was destroyed and degraded to small molecule under the action of microelectrolysis. Series reactor was used to improve the efficiency of microelectrolytic packing treatment of anode and cathode electrode, and the treatment effect was doubled by adjusting the pH, of primary effluent. The removal efficiency of pyridine and TOC can reach 65% and 55% respectively by applying direct current field to improve the efficiency of micro-electrolytic packing treatment of anode and cathode electrode. In the experiment of exploring the stability of the filler, the wastewater was treated continuously for one month. There is no cementing phenomenon and the filler is in good condition. In the whole process of pyridine wastewater treatment, the phenomenon of bonding has not been found in the packing for six months. Compared with the traditional micro-electrolysis technology, the service life of the filler has been greatly improved. To sum up, a new type of anode and cathode electrolytic micro-electrolytic filler, which is made from DSD acid industrial sludge, has good resistance to plate formation. In the process of pretreatment of pyridine wastewater, under the optimal experimental conditions (pH=3,HRT=6h,A/L=2), the removal rates of pyridine and TOC can reach 58% and 50% respectively. On the other hand, the stable operation of packing for a month did not appear the phenomenon of cementing, increasing its service life.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X783

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