超细滑石粉对造纸废水混凝效果的影响

Effects of SFT on Papermaking Wastewater Flocculation

选用超细滑石粉作混凝剂,考察其对造纸废水混凝效果的影响,影响因素有投加量、pH值、水力条件等。单因素试验结果表明,各影响因素的最佳取值分别为:SFT投加量5 g/L,pH值2,混合转速175 r/min,混合时间为50 s,反应转速50 r/min,反应时间15 min。在单因素影响研究的基础上,进行4因素3水平的正交实验,结果表明,SFT混凝效果的最佳条件为:投加量为2.5 g/L,pH值为2,混合转速为175 r/min,反应时间为5 min;各因素的影响顺序为:pH值>投加量>混合转速>反应时间。

In this paper the SFT is used as the coagulant to investigate its effect on papennaking wastewater flocculation and the affecting factors include the dosage, pH, hydraulic conditions and so on. Single factor experimental results show that the best values should respectively be： the dosage of SFT5 g/l, pH=2, mixture rotational speed 175 r/min, the mixing time 50 m, reaction rotation speed 50 r/min and reaction time 15 min. On the foundation of single factor research, the L^9（3^4） orthogonal experiment is carried out and the result shows that the best conditions are： the optimum dosage of SFT 2.5 g/L, pH = 2, mixture rotation speed 175 r/min and reaction time 5 min; the influencing ovder of each factor is pH, agent dosage, mixture rotation speed and reaction time.