摘要
浸没式超滤系统运行一段时间后,超滤膜污堵严重,跨膜压差明显增加,产水通量降低。经过分析,超滤膜污堵的主要原因是高密度沉淀池出水悬浮物高及聚丙烯酰胺(PAM)的过量使用,同时,超滤膜存在硫酸钙结垢现象。通过增加高密度沉淀池水力停留时间、控制PAM投加量及改进超滤膜的反洗、清洗方法,有效解决了超滤膜污堵的问题,恢复了超滤膜的通量。
After submerged ultrafiltration system had been running for a period of time,ultrafiltration membrane was seriously blocked,transmembrane pressure difference increased significantly,and production water flux decreased.After analysis,the main reasons for the fouling of ultrafiltration membrane were high suspended solids in high-density sedimentation tank and the excessive use of polyacrylamide(PAM).At the same time,ultrafiltration membrane had calcium sulfate scaling.By increasing the hydraulic retention time of high-density sedimentation tank,controlling PAM dosage,and improving backwashing and cleaning methods of ultrafiltration membrane.Problem of fouling of ultrafiltration membrane was effectively solved and the flux of ultrafiltration membrane was restored.
作者
李瑞峰
LI Ruifeng(Luthai Textile Co.,Ltd.,Zibo255100,China)
出处
《净水技术》
CAS
2020年第S02期101-102,共2页
Water Purification Technology
关键词
超滤膜
高密度沉淀池
聚丙烯酰胺
硫酸钙
ultrafiltration membrane
high-density sedimentation tank
polyacrylamide(PAM)
calcium sulfate(CaSO4)
