Coagulant And Coagulant Jointly Dosing Study Of Micro-polluted Source Water Test

At present, because of the pollution of sour face water, the limitation of the routine water treatment craft (RWTC) and the improving constantly of water quality, it is high-efficient time to develop new drinking water treatment craft which can ensure healthy drinking water .But in our country RWTC is being used in most drinking water plant, studies have shown that the main function of RWTC is to reduce turbidity in raw water ,at the same time there is suitable ability to get rid of organic-pollution. So enhancing RWTC is effective, economic method to deal with the problem about typical micro-polluted source water .Enhanced Coagulation (EC) is to generally acknowledge one of the effective method among them. As an ultimately safeguard of human health, the process of EC greatly improves of organics, including holmic substances and disinfection byproduct formation potentials, such as trihalo methane formation potential and haloacetic acid formation potential, as well as removal of common parameters such as turbidity.In view of time, in the experiments by comparing the effects of turbidity and organics removal of five coagulant types that are alum, polyaluminum chloride (PAC), poly aluminum-ferric chloride (PAFC), ferric sulfate, and ferric chloride, the coagulant shoot-adding amount, coagulant kind and the method of shooting have been established respectively .Varying coagulant type, coagulant dosages, and the method of shooting have done a large amount of jar-tests of EC. It has been shown that both the dose and the character of raw water greatly influence the coagulations. It can increase the removal ratio of turbidity, organics and control the concentration of aluminum/iron to different extent by adding the does of the coagulants or changing the method of shooting. At the same time the effect of coagulation between turbidity and organics has been found that their does are different. The relation between the elimination of turbidity and organics COD_Mn has existed. It is easer to reduce turbidity than organics COD_Mn, the feature of raw water has seriously affected the elimination of turbidity and hardly affected the remnant turbidity of last water. The result of organics COD_Mn just is contrary.In addition, a series of analyses about theoretical principles of removal of...