|
challenge to the conventional treatment process. Therefore, the study of treatment methods of micro-polluted water and determining the best processing conditions is significant to environmental protection. Enhanced coagulation process is based on and developed from the conventional technology, and its treatment efficiency can directly impact on the treatment of follow-up process and cost. This paper simulated the water plant’s enhanced coagulation treatment of micro-polluted source water(Fuxin Xi river). It carried on single enhanced coagulation experiments for five flocculants—ferric chloride, aluminum sulfate, aluminum chloride, ferric sulfate and ferric chloride coagulant to choose the best quality, dosage and the appropriate pH range of flocculants, which are suitable for raw water treatment. On this basis, study the enhanced coagulation effect of Na-zeolite powder.By experiment: PAFC is the best flocculant. When the dosage of PAFC is 35mg/L, Na-zeolite powder is 30mg/L, and control of the coagulation conditions—the fast stirring speed 200r/min, faster stirring time 0.5min, the stirring speed 120r/min, the stirring time 1min, slow stirring speed 40r/min, slow mixing time 15min, still time to 30min, pH 6~7,the process of removal rates of turbidity, NH3-N, CODMn and UV254 are 98.8%, 84%, 71.6%, 57.1%. When changing the water turbidity, with the increase of turbidity, removal efficiency of each index has risen. When changing the influent concentration of organic matter, with the increase of concentration of organic matter, removal rate of each index has a downward trend.
|