摘要
分析了浸没式超滤膜处理西江水的净水效能及运行稳定性,探讨了超滤膜化学清洗的效果。结果表明,原水分别经过混凝沉淀—超滤和混凝沉淀—砂滤—超滤两种工艺处理后,出水水质均有很大提升,出水平均浊度分别为0.07、0.06 NTU;中试运行过程中,对COD_(Mn)的平均去除率为20%,略优于常规处理工艺;出水中均未检测到剑水蚤、红虫等微型动物。对超滤膜进行化学清洗后跨膜压差恢复显著,清洗后TMP_(20℃)由33 k Pa降至16 k Pa。两种工艺的TMP_(20℃)平均增长速率分别为0.33、0.10 k Pa/d,超滤膜系统的跨膜压差增长缓慢,运行相对稳定。
The purification efficiency of the immersed uhrafiltration （UF） membrane used in purifying Xijiang water and its operation stability were analyzed, and the effect of chemical cleaning of UF membrane was investigated. The results showed that coagulation/sedimentation/UF and coagulation/sedimentation/sand fihration/UF, the two combined processes, both could greatly improve water quality, and the effluent turbidity were 0.07 and 0.06 NTU on average. The average removal rate of CODM, by the two combined processes was 20%, which was slightly better than that by conventional treatment process. Cyclops, red worms and other microfauna were not detected in UF effluent. Chemical cleaning could effectively reduce membrane fouling, TMP20℃ was decreased to 16 kPa from 33 kPa after cleaning. TMP20 ℃ growth rates of two combined processes were 0.33 and 0. 10 kPa/d, respectively. The transmembrane pressure （TMP） grew slowly, and could effectively ensure the operation stability of UF membrane.
出处
《中国给水排水》
CAS
CSCD
北大核心
2017年第3期46-49,共4页
China Water & Wastewater
关键词
超滤膜
组合工艺
净水效能
跨膜压差
膜污染
UF membrane
fouling combined process
purification efficiency
TMP
membrane
