Abstract:

The quaternary ammonium salt of chitosan was prepared by modified chitosan with 3-chloro-2-hydroxypropyl trimethylammonium chloride. Then it was applied in the coagulation-microfiltration process to study its effect on the effluent quality and membrane fouling. The experimental results showed that when the dosage of CS-CTA was 4 mg/L, there was the best water quality with 81.8% removal rate of UV₂₅₄ and more than 99.9% turbidity. In addition, when the dosage of CS-CTA was 3 mg/L, the irreversible membrane resistance caused by the coagulation effluent was the minimum, and the membrane flux was the highest. CS-CTA as a coagulant can reduce membrane fouling more effectively than PAC.

Key words: chitosan quaternary ammonium salt, coagulation, microfiltration, membrane fouling

摘要：

通过3-氯-2-羟丙基三甲基氯化铵（CTA）改性壳聚糖（CS）制备壳聚糖季铵盐（CS-CTA），并将其应用在混凝-微滤工艺中来研究其对出水水质和膜污染的影响。结果表明，在CS-CTA投加量为4 mg/L时，出水水质最好，此时UV₂₅₄去除率为81.8%，浊度去除率为99%以上；在CS-CTA投加量为3 mg/L时，混凝出水引起的不可逆膜阻力最小，膜通量最高；与PAC相比，CS-CTA作为混凝剂能更有效地减缓膜污染。

关键词: 壳聚糖季铵盐, 混凝, 微滤, 膜污染

CLC Number: 

• X703.1