摘要：

试验以毛细吸水时间(CST)和离心后污泥含水率作为污泥脱水性能指标, 探讨了超声波与高分子絮凝剂阳离子瓜尔胶(CGG)及聚丙烯酰胺(PAM)联合作用对污泥脱水性的影响。结果表明, 单独超声波调理污泥, 当超声频率为20 Hz, 功率为60 W时, 最佳作用时间为20 s;超声波与CGG联合调理污泥, 当CGG投加量为900 mg/L时, CST由原污泥的470 s降低到76 s, 污泥离心含水率由原污泥的88.3%降低到75.3%;超声波与CGG+PAM联合调理污泥, 当CGG和PAM投加量分别为300 、120 mg/L时, CST和污泥离心含水率均明显降低, 分别降低到18 s和58.8%。

关键词: 污泥, 超声波, 絮凝剂, 脱水性

Abstract:

In the experiment, capillary suction time(CST) and water-content rate of centrifuged sludge have been taken as the indexes of sludge dewatering capacity. The effects of the combining action of ultrasonic and macromolecule flocculant cationic guar gum (CGG) and polyacrylamide (PAM) on sludge dewatering capacity are discussed. The results show that for sludge conditioning by single ultrasonic, when ultrasonic frequency is 20 Hz and power 60 W, the best conditioning time is 20 s. For sludge conditioning by the combination of ultrasonic and CGG, when CGG dosages are 900 mg/L, the CST decreases from the original 470 s to 76 s and the sludge centrifnged water-content rate decreases from 88.3% of original sludge to 75.3%. For the sludge conditioning by ultrasonic and CGG and PAM, when the dosages of CGG and PAM are 300 mg/L and 120 mg/L, respectively, the CST and sludge centrifuged water-content rate are decreased obviously to 18 s and 58.8%, respectively.

Key words: sludge, ultrasonic, flocculant, dewatering capacity

中图分类号: 

• X703