A Study Of Effect Of Sound, Light, Magnetism, Electricity On Biological Activity Of Activated Sludge Bacterium

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.