【作者】 冯霞；

【导师】 罗亚田；

【作者基本信息】 武汉理工大学 ， 环境工程， 2006， 硕士

【摘要】 水污染控制技术中废水处理的方法很多,其中生物处理方法经历了百余年的发展和应用,发挥了重要作用。 活性污泥法是处理城市污水最广泛使用的方法。它能从污水中去除溶解的和胶体的可生物降解有机物及能被活性污泥吸附的悬浮固体和其他一些物质。无机盐类也能部分地被去除。但是随着工业的发展,越来越多、越来越复杂的有机物进入水体,活性污泥法的处理能力受到了极大的挑战,因此提高活性污泥细菌对有机物尤其是对复杂有机物的降解效率成为当今水处理领域的重要课题。 利用物理能场促进活性污泥细菌活性发生正向变异或突变是提高微生物生物活性和创建高效环境工程菌种的迅速而简便的方法。但是,目前对该方法的理论和实践研究尚欠系统和深入。物理能场对微生物影响的研究,都还是属于起步阶段,许多问题还没有解决,也还没有形成完整的物理能场对微生物影响的理论体系,在对活性污泥活性方面的研究更是少见。这种状态使该法在环境工程方面难以获得广泛应用。 本研究的目的旨在探讨声,光,磁,电这些物理能场对活性污泥的活性的影响,从而了解和掌握它们对活性污泥处理废水的影响规律和处理效果,寻求能够提高活性污泥的活性的最佳条件,以促使活性污泥细菌生物活性的增强,进而使之能够广泛、高效地应用于废水的处理。 由于实验条件限制,本次实验研究采用测定耗氧速率的方法来间接判定活性污泥细菌生物活性的变化。生物活性的增长率则以物理能场处理样与相同条件下的未处理样的耗氧速率的差异为依据来计算。本研究分别对磁场,紫外光,激光,电场,超声波场对活性污泥细菌活性的影响进行了较为系统的研究。并分别总结了每个物理能场在本实验条件下对活性污泥细菌的影响规律,以及其生物活性提高的最佳效果和最佳条件,进而综合总结了物理能场影响活性污泥细菌的一般规律。从而丰富或填补了该研究领域的理论与实践,为将来使用该方法创新出更高效的活性污泥处理工艺提供基础性的资料。 通过实验研究,除了分别获得各物理能场在本实验条件下对活性污泥细菌更多还原

【Abstract】 There are a lot of methods for wastewater treatment in control technology of water pollution;biological treatment of wastewater has gone through development and application for hundreds of years, playing an important part in water treatment.Activated sludge process is widely used in treating municipal sewage. It can remove soluble and colloidal biodegraded organic matter and suspended solid adsorbed by activated sludge from wastewater. Inorganic salts can also be removed partially. However, with the development of industry, more and more complicated organic matters enter into waters;treatment ability of activated sludge process is under great challenge. Therefore, improving the degradation efficiency for activated sludge bacteria to organic matter, especially to complex organic matters is an important issue in the field of water treatment nowadays.The method of promoting activated sludge bacteria to active variation by physical energetic field may be a rapid and simple way to improving microorganic activation and may establish effective environmental engineering bacteria. Now the research of theory and practice for the method is not systematic and embedded. The research of effect of physical energetic field on microorganism is on the first stage, having a lot of questions unresolved, having no integrated theory system and less researches on. Such state hindered its application in environmental engineering widely.In the thesis, effect of physical energetic field such as sound, light, magnetism and electricity is investigated, to master the effect rule and treatment effect and to seek optimal condition in order to improve the activation of activated sludge and put it into application of wastewater treatment.Transient velocity of consumption of oxygen for microorganism is used in the thesis to presume ability change of degradation. Effect of UV light, laser, electric field and ultrasonic on activation of activated sludge bacteria is studied systematically in the thesis. Effect rule of activated sludge bacteria for each physical energetic fieldand optimal condition of improving biological activation are summarized respectively, to summarize common rule of activated sludge bacteria and to enrich theory and practice in this field, which lead to basic research by more effective activated sludge technology.Effect rule of activated sludge bacteria for each and optimal condition of active variation are summarized respectively, common rule of activated sludge bacteria is also summarized. That is to say, effect of physical energetic field on microorganic activation has two facets: restrainment and promotion. Optimal range and condition of active variation must be obtained exactly, which can lead to high degradation ability of activated sludge bacteria to organic matters.更多还原