Chironmid Larvae Chlorination Vote Dioxide,Chlorine Disinfection By-products Formation Law

In recent years, parts of the country appeared to exist in a lot of chironomid larvae in the water supply system, making the water supply water quality deterioration. Chironomid larvae easily lead to the spread of disease, harm to human health, this will also cause social panic, and to bring psychological unease. Chironomid larvae as a large zooplankton in the city water sources, especially the large population of lake and reservoir water with raw water into the water treatment process. Chironomid larvae in a strong antioxidant activity, the conventional water treatment disinfection process is difficult to effectively inactivated.Chironomid larvae, to take the chlorine dioxide-Joint chlorine disinfection, chlorine dioxide dosage, temperature, reaction time, the pH of four reaction conditions chloroform (TCM), dichloroacetic acid (of DCAA) trichloroacetic acid (TCAA) dichloro-acetonitrile (DCAN) of1,1-dichloro-acetone (1,1-DCP),1,1,1-trichloro-acetone (1,1,1-TCP) to generate the amount of.The results showed that:six DBPs concentration with reaction time, temperature, the bloodworm number of investment and the increase in the amount of chlorine vary, but the trends are different. DCAA,TCAA,TCM, DCAN,1,1-DCP,1,1,1-TCP the generation increased with the increase in chlorine dioxide dosage is reduced; response the longer the contact time of chlorine with organic matter in the water The longer the more the amount of the reaction of the DBPs; variation with temperature, DCAA, TCAA, TCM, DCAN,1,1-DCP,1,1,1-TCP changes, which, of DCAA, TCAA generation the amount of at least20℃, the generated volume of TCM, DCAN,1,1-DCP,1,1,1-TCP with the reaction temperature increased to a lesser extent; with changes in pH of DCAA, TCAA, TCM, DCAN,1,1-DCP,1,1,1-TCP changes, which of DCAA, TCAA at pH8to generate the highest in the5-8range, with the increase of pH.; TCM, DCAN,1,1-DCP,1,1,1-TCP formation at pH 7, but the overall change was not. Chlorine dioxide-Joint chlorine disinfection process, of DBPs formation affected by many factors, the need to consider the various reaction conditions, and proper control of the chlorine dioxide dosage, control the chlorine dioxide-Chlorine dosing ratio, to reduce the chlorine reaction time, the reasonable control of the reaction temperature, pH value, and maximize the reduction of DBPs formation.