电化学技术控制生物膜和军团菌的机理研究

发布时间：2018-06-26 03:22

本文选题：电化学 + 生物膜　；参考：《同济大学》2006年硕士论文

【摘要】：近些年,我国城市发展日新月异,现代化设施在给人们带来舒适的同时,也为军团菌的孳生创造了有利条件,人们接触军团菌的机会越来越多。军团菌与水的关系非常密切。现在人们逐渐认识到军团病的发作不仅仅是空调系统问题,而且是一个供水问题,当与人类生活密切的水源系统一旦被该菌污染,便有可能会引起军团病的散发和爆发流行。常用的军团菌控制方法诸如氯消毒、铜和银的正离子消毒、臭氧消毒、紫外线(UV)消毒等方法都存在各种各样的缺陷,除各自方法本身特点原因外,另一主要原因就是由于军团菌易寄生在水生细菌、原生动物、生物膜的特性所造成的。电化学技术是一种新型的水处理技术。近年来,电化学技术用于水处理消毒取得了长足的发展,该技术的应用也逐步涉及到多个领域。研究表明电化学技术的多种杀菌机制可以有效控制生物膜的形成,而且具有持续杀菌的作用。实践也表明该技术用于水处理杀菌、消毒是经济高效的。本课题将电化学杀菌、消毒技术用于军团菌的控制,将为目前亟待解决的军团菌控制问题开辟了新途径。此外对该技术杀灭军团菌机理方面的初步研究及探讨其作用规律,也将为在生产实践中推广和合理应用该类装置提供理论依据。本论文从生物膜和军团菌微观结构两个角度,对运用电化学技术控制军团菌进行了研究,研究思路如下: 一、军团菌具有可存活在生物膜内的生长特性,使其可处在生物膜的保护作用下,从而导致传统的杀菌消毒措施往往不能取得理想的效果。因而,首先从环境因素角度考察,研究电化学杀菌、消毒技术对生物膜和总菌的控制。二、从微观学角度出发,实验采用电化学方法、加氯消毒、Fenton试剂消毒三种不同的方法,作用于含有初始军团菌浓度为No的纯菌水样,在各自的反应条件下,作用一段时间后测其杀菌率,并利用扫描电镜来观察经过不同方法处理后,军团菌细胞表面结构的变化。由上研究得出如下结论: 1、电化学方法对于控制模拟循环水系统中生物膜和总菌均具有较理想的效
[Abstract]:In recent years, the development of cities in China is changing with each passing day. At the same time, modern facilities bring comfort to people, and also create favorable conditions for the breeding of Legionella. People have more and more opportunities to contact Legionella. The relationship between Legionella and water is very close. It is a water supply problem. When the water source system closely related to human life is polluted by this bacterium, it may cause Legionella disease sporadic and outbreaks.
The common control methods of Legionella bacteria such as chlorine disinfection, copper and silver positive ion disinfection, ozone disinfection, and ultraviolet (UV) disinfection have all kinds of defects. In addition to the characteristics of their own methods, the other main reason is that Legionella is easily parasitized by the characteristics of aquatic bacteria, protozoa and biofilm. Technology is a new kind of water treatment technology. In recent years, electrochemical technology has made great progress in the disinfection of water treatment. The application of this technology has also been involved in many fields. The research shows that many kinds of bactericidal mechanisms of electrochemical technology can effectively control the formation of biofilm and have the effect of continuous sterilization. Practice also shows that The technology is economical and efficient for sterilization and disinfection in water treatment.
The application of Electrochemical Sterilization and disinfection technology in the control of Legionella will open up a new way for the problem of Legionella control, which is urgently to be solved at present. In addition, the preliminary study on the mechanism of killing Legionella by this technology and the law of its action will also provide a theoretical basis for the application of this kind of device in the production practice.
From the two perspectives of biofilm and Legionella microcosmic structure, this paper studied the use of electrochemical technology to control Legionella.
First, Legionella has the growth characteristics that can survive in the biofilm, so that it can be under the protective effect of biofilm, which leads to the traditional sterilization and disinfection measures often can not achieve the ideal effect. Therefore, first from the environmental factors, the study of Electrochemical Sterilization and the control of the biological membrane and the total bacteria by the Electrochemical Sterilization Technology.
Two, from the microcosmic point of view, the experiment uses electrochemical methods, chlorination disinfection, and Fenton reagent disinfection three different methods. It acts on the pure bacteria water samples containing the initial Legionella concentration of No. Under the respective reaction conditions, the bactericidal rate is measured after a period of action, and the scanning electron microscope is used to observe the Legionella after different methods. Changes in the surface structure of the cells.
The following conclusions are drawn from the previous study.
1, the electrochemical method is ideal for controlling the biofilm and total bacteria in the simulated circulating water system.
【学位授予单位】：同济大学
【学位级别】：硕士
【学位授予年份】：2006
【分类号】：R183

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