The Research Of Sterilization And Disinfection Of Light Polluted Water By Electrocoagulation Method

This task is carried on for the area where there is not living sanitation water supplying. The aid of the task is to excogitate a slightly polluted water transacting technique that can be referenced by waterworks, and to manufacture a water supplying equipment that is applied and convenient to be carried. The essay can be divided three parts as a whole.The first part is a summary of literatures. In this part the present drinking water supplying technique have been researched fully, and their advantages and disadvantages has been summed. Furthermore the new idea about how to treat the slightly polluted water by electro-agglomeration has been put forward.The second part is about experiments. In this part the effect that use electro-agglomeration to treat slightly polluted water has been researched through experiments. Though the static experiments, we can see that main factors of electro-agglomeration include: pH, electrified time, current density, and sedimentation time. The best parameters for the treatment techniques have been find out, they are: the best electric current density is 1.16mA/cm2; the best electrify time is 10min; the best settlement time is 10 min. Based on these, electro-agglomeration and other water treatment techniques have been combined with, so the technique to treat with slightly polluted water has been decided as follow: electro-agglomeration +gas-floatation â†' coarse-filtrate â†'violet-sterilizeâ†' super-filtrate. Furthermore, the techniques has been applied to life, so the water supply equipment has been manufactured, it is convenient to take along. Using the equipment, the water comes from Dong Lake and the Long River has been treated. All indexes including physics-chemist indexes and biology indexes are measured up according to drinking water sanitation criterion(2001).Whereafter the mechanism about how the contaminations be effected by electro-agglomeration has been discussed in part three. The main effect of electro-agglomeration in water has been pointed out, that is adsorption, oxygenation-deoxidize and electro- floatation.In the fourth part, the cost of the equipment has been analysised, The cost of the laboratory water dispenser is ï¿¥ 2480, water treatment cost is ï¿¥ 5.95 per ton, preliminary study about how to popularize the technics has been discussed too.