不同阴极条件微生物电化学系统污泥减量产能研究
发布时间：2018-08-27 20:08
【摘要】：微生物电化学系统是一种新兴的,可以从反应体系底物中回收能源的技术,在能源问题逐渐成为困扰人们的重大难题的21世纪,微生物电化学系统为解决能源问题提供了一个新的方向。微生物电化学系统主要包括微生物燃料电池和微生物电解池两大类。现行的城市污水处理工艺大多数为活性污泥法,该方法有着水处理效果好,基建及运行费用较低,对冲击性水力负荷耐受程度较好等优点。但是,该方法有一个很严重的问题,那就是在处理城市生活污水时,会产生较多的剩余污泥。于传统剩余污泥的处理耗资巨大,直接弃之不管又会产生严重的环境污染。而微生物电化学系统可以回收剩余污泥中的能源,且运行条件较为温和,因此对微生物电化学系统的污泥减量性能和能量回收性能进行研究就显得十分有必要。本实验首先考察了不同阴极催化剂形式的MFC在乙酸钠底物和剩余污泥为底物下的运行效能。综合乙酸钠底物和剩余污泥底物下,MFC体系的产能情况,发现辊压活性炭催化剂阴极体系的MFC反应器有着最好的电化学性能。同时在对剩余污泥进行处理时,其体系的COD、TSS、VSS去除效果与铂炭催化剂阴极MFC体系相比,变化不大。在不同阴极催化剂形式下,三组不同阴极催化剂形式的反应器均实现了从底物中回收电能,虽然生物阴极反应器的产电效能较低,但其对底物变化的耐受性要更强一些。理论上讲,铂炭催化剂的效能应好于活性炭催化剂的效能,但是本实验中活性炭采用辊压工艺,附着于钢网基质表面,而铂炭催化剂采用涂布工艺,由于辊压工艺阴极的均一性要更好,也由此使得本实验中活性炭催化剂阴极性能要好于铂炭催化剂阴极性能。为了探究辊压活性炭催化剂和涂布铂炭催化剂阴极在MEC反应器上的运行效能,后本实验考察了,活性炭催化剂阴极和铂炭催化剂阴极单室立方体MEC的产气性能,对比发现在MEC体系下,活性炭催化剂阴极与铂炭催化剂阴极的产气性能差距不大。对比之下,本实验采用辊压性炭催化剂阴极作为滚筒式MEC的阴极催化系统。之后本实验对比了滚筒式MEC在2 g/L单纯底物乙酸钠和复杂底物,碱预处理剩余污泥下的运行效能,并对滚筒式MEC的剩余污泥处理效能进行了初步探讨。本实验综合考量了不同SRT下滚筒式MEC的产气性能和污泥减量性能,确定了SRT为16天时,滚筒式MEC处理碱预处理剩余污泥,有着更为优良的综合性能。
[Abstract]:Microbial electrochemical system is a new technology which can recover energy from the substrate of the reaction system. In the 21st century, the energy problem has gradually become a major problem for people. Microbial electrochemical system provides a new direction for solving the energy problem. There are two main types of bio-electrolysis cell. Most of the current municipal sewage treatment processes are activated sludge process. This method has the advantages of good water treatment effect, low capital construction and operation cost, and good tolerance to impact hydraulic load. However, the microbial electrochemical system can recover energy from the excess sludge, and the operating conditions are relatively mild. Therefore, it is necessary to study the sludge reduction performance and energy recovery performance of the microbial electrochemical system. It is necessary. Firstly, the performance of MFC with different forms of cathode catalysts under the substrates of sodium acetate and excess sludge was investigated. The MFC reactor with rolled activated carbon cathode system has the best electrochemical performance. The removal efficiencies of COD, TSS and VSS in the system were similar to those of the platinum-carbon catalyst cathode MFC system when the excess sludge was treated. In theory, platinum-carbon catalyst should be more effective than activated carbon catalyst, but in this experiment, the activated carbon used roll-pressing process, adhered to the surface of steel mesh substrate, and platinum-carbon catalyst used coating process, because the uniformity of the cathode roll-pressing process is better, which makes the experiment live. The cathodic performance of carbon catalysts is better than that of platinum carbon catalysts. In order to investigate the performance of rolled activated carbon catalyst and platinum-coated carbon catalyst cathode in MEC reactor, the gas production performance of activated carbon catalyst cathode and platinum-coated carbon catalyst cathode in one-compartment cubic MEC was investigated. Compared with the platinum carbon catalyst cathode, the rolled carbon catalyst cathode was used as the cathode catalytic system of the drum-type MEC. Then the performance of the drum-type MEC under 2 g/L sodium acetate and complex substrate, alkali pretreatment of residual sludge, was compared. The treatment efficiency of excess sludge of drum-type MEC was preliminarily discussed. The gas production performance and sludge reduction performance of drum-type MEC under different SRTs were comprehensively considered. It was determined that the drum-type MEC could treat excess sludge by alkali pretreatment when SRT was 16 days.
【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】：X703
[Abstract]:Microbial electrochemical system is a new technology which can recover energy from the substrate of the reaction system. In the 21st century, the energy problem has gradually become a major problem for people. Microbial electrochemical system provides a new direction for solving the energy problem. There are two main types of bio-electrolysis cell. Most of the current municipal sewage treatment processes are activated sludge process. This method has the advantages of good water treatment effect, low capital construction and operation cost, and good tolerance to impact hydraulic load. However, the microbial electrochemical system can recover energy from the excess sludge, and the operating conditions are relatively mild. Therefore, it is necessary to study the sludge reduction performance and energy recovery performance of the microbial electrochemical system. It is necessary. Firstly, the performance of MFC with different forms of cathode catalysts under the substrates of sodium acetate and excess sludge was investigated. The MFC reactor with rolled activated carbon cathode system has the best electrochemical performance. The removal efficiencies of COD, TSS and VSS in the system were similar to those of the platinum-carbon catalyst cathode MFC system when the excess sludge was treated. In theory, platinum-carbon catalyst should be more effective than activated carbon catalyst, but in this experiment, the activated carbon used roll-pressing process, adhered to the surface of steel mesh substrate, and platinum-carbon catalyst used coating process, because the uniformity of the cathode roll-pressing process is better, which makes the experiment live. The cathodic performance of carbon catalysts is better than that of platinum carbon catalysts. In order to investigate the performance of rolled activated carbon catalyst and platinum-coated carbon catalyst cathode in MEC reactor, the gas production performance of activated carbon catalyst cathode and platinum-coated carbon catalyst cathode in one-compartment cubic MEC was investigated. Compared with the platinum carbon catalyst cathode, the rolled carbon catalyst cathode was used as the cathode catalytic system of the drum-type MEC. Then the performance of the drum-type MEC under 2 g/L sodium acetate and complex substrate, alkali pretreatment of residual sludge, was compared. The treatment efficiency of excess sludge of drum-type MEC was preliminarily discussed. The gas production performance and sludge reduction performance of drum-type MEC under different SRTs were comprehensively considered. It was determined that the drum-type MEC could treat excess sludge by alkali pretreatment when SRT was 16 days.
【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】：X703
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1 杨波,陈季华,奚旦立;剩余污泥的处理与处置技术[J];东华大学学报(自然科学版);2005年02期
2 郝晓地;蔡正清;甘一萍;;剩余污泥预处理技术概览[J];环境科学学报;2011年01期
相关硕士学位论文 前3条
1 王s，
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