The Reservoir Water Analysis And Treatment Studies In Western Region Of Small Cities And Towns

In recent years, facing the problem of increasing water pollution and water shortage,domestic and overseas research on the treatment of micro-polluted source water (MPSW) is available. This study selected Tangyu Reservoir as its research object, which is located in Lantian City, Shaanxi Province, China. Based on monitoring water quality from April,2009 to January,2010 about ten monthes, we analyzed the change trend and reasons of pollutants measures. Enhanced coagulation laboratory tests of static beaker and using highly efficient solid-liquid separation were done for treating the water quality of a particular period.The monitoring results indicated:pH of source is approximately 8, turbidity and the concentrations of TN exceed the allowed standard, the concentrations of NH4+-N and TP consistent with a drinking water quality standards, but occasionally exceed the allowed standard.In the summer, the concentration of organism is caused to be high as a result of massive reproductions, metabolism and death of algae.More rain in summer,the rainstorm will cause water levels rise sharply and the serious deterioration of water quality particularly turbidity. In high-temperature and high-alga water quality phase, the best option is PAC dosage of 25mg/L if only sole coagulant was used to enhanced coagulation, while the best option is PAC dosage of 25mg/L and PAM dosage of 0.4mg/L if the coagulant-aid was added.In low-temperature and low-turbidity water quality phase, efficient solid-liquid separator used on the source of the water reservoir conducted Tangyu pilot test site.Source water turbidity in the 4-6NTU, source water temperature in 4-14℃.In the test,PAC adding point is before the static mixer,while PAM adding point is between the static mixer and the pipe reactor. The primary purpose is to determine the best dosage of PAC and PAM,Best stirring intensity,the largest increase in flow rate,sludge recycle ratio,comparison of PAC and ferric salt test and so on. Results show that, the best dosage of PAC is 3.0mg/L,dosage of PAM is 0.4mg/L,stirring intensity is 4r/min,the return sludge flow is best to be 49.2L/h,PAC is better than using ferric.Concluded from the experiments:the technique has a promising potential to be applied in the drinking water treatment, and it should to be father deeply studied.