Application of PAC modified active silica acid to treat the low-temperature and low-turbidity water

The removal effects to treat the low temperature and low-turbidity water from Shitou River were researched by using polyaluminum chloride(PAC) + modified active silica acid and PAC alone through the jar test.The results indicated as follows: While treating low temperature and low-turbidity water,purified result of using PAC + modified active silica acid is significant better than using polyaluminum chloride(PAC) alone,the removal rate of turbidity can increased by more than 10 percentage,it will decreases surface water treatment plant's costs and increases benifit Earnings.When treated low temperature and low-turbidity water using PAC + modified active silica acid,witch exerts the features of big vitriol flower,quickly settling rate,stability value of pH and low turbidity.There is also a good consistent in the removal rate of suspended solids(SS),chemical oxygen demand and turbidity.