内、外压超滤膜在净水中的对比试验研究

发布时间：2018-04-27 08:19

本文选题：超滤 + 内压式　；参考：《中国给水排水》2016年21期

【摘要】：针对水源水质特征,构建了微絮凝+超滤一体化装置,分别选取了内压式和外压式中空纤维超滤膜开展中试对比研究,探讨了两种超滤膜装置的处理效果、运行稳定性和产水回收率等。结果表明,内、外压超滤装置对浊度、CODMn、低浓度氨氮的去除效果均较好,出水水质均优于我国《生活饮用水卫生标准》(GB 5749—2006);内、外压式膜组件同步运行时的膜比通量(SF)都比较稳定,内压式膜组件的SF是外压式的两倍多,跨膜压差(TMP)受温度影响较外压式小,运行压力约为外压式的一半;单个过滤周期中内压式膜组件的SF衰减速率是外压式的3倍多;虽然大水流高强度冲洗以及酸碱交错化学增强反冲洗(CEB)的方式能够替代外压式的气擦洗,但也增加了耗药量并使得产水回收率较外压式低5%;当原水水质较好时,考虑SF、运行压力和能耗方面的优势,可优先选择内压式膜组件,但必须加强超滤前的预处理。
[Abstract]:According to the characteristics of water quality, a micro-flocculation ultrafiltration unit was constructed, and the internal pressure and external pressure hollow fiber ultrafiltration membranes were selected to carry out a comparative study, and the treatment effects of two kinds of ultrafiltration membrane devices were discussed. Operation stability and water recovery. The results show that the internal and external pressure ultrafiltration device has better removal effect on turbidity COD mn and low concentration ammonia nitrogen, and the effluent quality is better than that of our country (GB 5749-2006). The membrane specific flux (SF) of the external pressure membrane assembly is stable when it is running simultaneously. The SF of the internal pressure membrane assembly is more than twice that of the external pressure type. The temperature influence of the transmembrane pressure difference is less than that of the external pressure type, and the operating pressure is about half of that of the external pressure type. The SF attenuation rate of the internal pressure membrane assembly in a single filtration cycle is more than three times that of the external pressure type, although the high strength flush with large water flow and the acid-base chemical backwash CEB can replace the external pressure air scrubbing. When the raw water quality is better, the advantages of SF, operation pressure and energy consumption can be considered, and the internal pressure membrane assembly can be selected first, but the pretreatment before ultrafiltration must be strengthened.
【作者单位】：同济大学环境科学与工程学院;福州城建设计研究院有限公司;福州大学土木工程学院;
【基金】：福建省住房和城乡建设厅科学技术项目(2014-K-05)
【分类号】：TU991.2

【参考文献】