高铁酸钾-PAM组合工艺处理微污染水的响应面优化

Response surface optimization of micro-polluted water by potassium ferrate-PAM combined process

采用高铁酸钾-PAM组合工艺处理含有一定浊度的微污染水,对其影响因素和去除效果进行了响应面优化实验。以PAM投加量、pH、慢速搅拌速率为影响因素,以CODMn、浊度去除率为响应值,利用Design-Expert软件对实验数据进行优化。结果表明,高铁酸钾-PAM组合工艺处理浊度为11 NTU左右微污染水的最佳工艺条件为:慢速搅拌速率为50.51 r/min,初始pH为7.64,PAM投加量为11.56 mg/L,此时浊度、CODMn的去除率分别为74.19%,78.0%。通过模型验证,确定采用高铁酸钾-PAM组合工艺处理微污染水是可取、有意义的。

The micro-polluted water with certain turbidity was treated by potassium ferrate-PAM combination process,and the response surface optimization experiment was carried out on its influencing factors and removal effects.The PAM dosage,pH and slow agitation rate were taken as the influencing factors,and the COD Mn and turbidity removal rates were used as the response values.The experimental data were optimized by Design-Expert software.The results showed that the potassium ferrate-PAM combination process was used to treat the turbidity.The optimum process conditions for micro-polluted water around 11 NTU are:slow agitation rate of 50.51 r/min,initial pH of 7.64,and PAM dosage of 11.56 mg/L.The removal rate of turbidity and COD Mn is 74.19%,78.0%.Finally,through model verification,it is feasible and effective to treat the micro-polluted water by the potassium ferrate-PAM combination process.