厌氧—生物电化学耦合系统对茜素黄R的去除效能

发布时间：2018-03-15 08:33

本文选题：厌氧　切入点：生物电化学　出处：《哈尔滨工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：偶氮染料废水具有色度高、成分复杂、排放量大、可生化性差等特点,属于难降解的工业废水,其中所含物质多数致畸、致癌、致突变,排放到环境中会对生态系统以及人类的健康生存造成严重威胁。目前传统的处理偶氮染料废水的工艺多为物理化学法以及生物法等工艺,但这些传统的工艺存在种种弊端,因此我们考虑将生物电化学方法与传统的生物处理法相结合,以达到在高效处理偶氮染料废水的目的。本研究选取的偶氮染料为茜素黄R(AYR),首先研究无隔膜生物电化学系统对偶氮染料的处理效能,考察AYR浓度以及外加电压对染料脱色效能的影响,同时分析AYR对阳极性能的影响。结果表明,无隔膜生物电化学系统对偶氮染料的脱色效能受偶氮染料初始浓度以及外加电压的影响,AYR浓度为75mg/L时,该系统装置的脱色效能最高;外加电压(闭路)能够促进无隔膜生物电化学系统对偶氮染料的脱色,同时还能维持阳极电活性生物膜的活性,使反应器效能稳定;同时偶氮染料对无隔膜生物电化学系统阳极性能的影响与脱色效能的影响规律相一致。在此基础上,为了保持生物阳极的活性及稳定性,促进阴极能够更好的发挥偶氮染料脱色的功能,本研究开发构建了30L放大规模的套筒型厌氧-生物电化学耦合装置(AD-BES),将生物电化学系统置于厌氧污泥床上部,同时,阳极置于阴极中间,以阴离子交换膜隔开,厌氧污泥区与阴极区联通,阳极单独控制,生物电化学区有两组电极(1#和2#)构成,利用该装置处理偶氮染料废水,分别在间歇性进水和连续进水状态下运行,结果表明,AD-BES系统在HRT=12h,进水偶氮染料负荷为140g/m3 d时,对偶氮染料AYR的脱色率最大达到93.2±2.2%,明显高于单纯的厌氧AD工艺(85.1±0.7%),AD-BES对偶氮染料的最大去除速率达到264 g/m3 d,其中,生物电化学系统的引入促进了厌氧生物工艺对染料进一步去除,其偶氮染料去除的贡献率最大为10.5%,电化学模块的加入也增强了该装置对COD的去除效能,本研究证实了放大化的厌氧-生物电化学耦合工艺的有效可行性。
[Abstract]:Azo dye wastewater has the characteristics of high chromaticity, complex composition, large discharge, poor biodegradability and so on. It belongs to industrial wastewater which is difficult to degrade. Most of the substances contained therein are teratogenic, carcinogenic and mutagenic. Discharge into the environment will pose a serious threat to the ecosystem and the healthy survival of human beings. At present, most of the traditional processes for treating azo dye wastewater are physicochemical and biological processes, but these traditional processes have many disadvantages. So we're thinking about combining bioelectrochemistry with traditional bioprocessing, In order to deal with azo dye wastewater efficiently, the azo dye was selected as alizarin yellow AYRN in this study. Firstly, the bioelectrochemical system without membrane was used to treat azo dye. The effects of AYR concentration and applied voltage on the decolorization efficiency of dyes were investigated, and the effects of AYR on the anode properties were analyzed. The decolorization efficiency of the system was the highest when the concentration of AYR was 75 mg / L, and the effect of the initial concentration and applied voltage of the azo dye on the decolorization efficiency of the system was the highest. The applied voltage (closed circuit) can promote the decolorization of azo dyes by non-diaphragm bioelectrochemical system, and maintain the activity of anodic electroactive biofilm, so that the reactor efficiency is stable. At the same time, the effect of azo dyes on anode performance of non-diaphragm bioelectrochemical system is consistent with the effect of decolorization efficiency. On this basis, in order to maintain the activity and stability of biological anode, In order to promote the cathode to play a better role in the decolorization of azo dyes, a 30L jacket anaerobic-bioelectrochemical coupling device (AD-BESN) was developed, which placed the bioelectrochemical system on the upper part of the anaerobic sludge bed. The anode is placed in the middle of the cathode, separated by anion exchange membrane, the anaerobic sludge area is connected with the cathode area, the anode is controlled separately, and the bioelectrochemical zone is composed of two groups of electrodes, I. e., the anion exchange membrane, the anion exchange membrane, and the anode. The results show that the AD-BES system has an azo dye loading of 140 g / m ~ 3 / d at HRT for 12 h. The maximum decolorization rate of azo dye AYR was 93.2 卤2.2, which was significantly higher than that of pure anaerobic AD process (85.1 卤0.7g / m ~ 3). The maximum removal rate of azo dyes was 264g / m ~ 3 / d by AD-BES. The introduction of bioelectrochemical system promoted the further removal of azo dyes by anaerobic bioprocess. The maximum contribution rate of azo dye removal was 10.5, and the efficiency of COD removal was enhanced by the addition of electrochemical module. This study confirmed the feasibility of the amplified anaerobic bioelectrochemical coupling process.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X791

【参考文献】