[1]许航,王澳,丁明梅,等.膜蒸馏处理滤池反冲洗废水的效能研究[J].中国给水排水,2024,40(9):50-55.
　XUHang,WANGAo,DINGMing-mei,et al.Performance of Membrane Distillation for Treating Filter Backwash Wastewater[J].China Water & Wastewater,2024,40(9):50-55.
点击复制

膜蒸馏处理滤池反冲洗废水的效能研究

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第40卷 期数: 2024年第9期 页码: 50-55 栏目: 出版日期: 2024-05-01
Title:
Performance of Membrane Distillation for Treating Filter Backwash Wastewater
作者:
许航1， 王澳1， 丁明梅1， 马珺1， 张磊2， 梅才华2
（1.河海大学 环境学院，江苏 南京 210009；2.滁州学院 土木与建筑工程学院，安徽 滁州 239099）
Author(s):
XU　Hang1， WANG　Ao1， DING　Ming-mei1， MA　Jun1， ZHANG　Lei2， MEI　Cai-hua2
（1. College of Environment， Hohai University， Nanjing 210009， China； 2. College of Civil and Architecture Engineering， Chuzhou University， Chuzhou 239099， China）
关键词:
膜蒸馏;  滤池反冲洗废水;  废水回用;  膜通量;  膜污染
Keywords:
membrane distillation;  filter backwash wastewater;  wastewater reuse;  membraneflux;  membrane fouling
摘要:
采用膜蒸馏（MD）工艺，考察了聚偏氟乙烯（PVDF）、聚四氟乙烯（PTFE）和聚丙烯（PP）3种材质的疏水膜对滤池反冲洗废水的处理效果。结果表明，PTFE膜的性能最佳，在60 ℃下能保持（15.2±0.8） L/（m2·h）的渗透通量，并可稳定截留99%的无机离子和80%以上的有机污染物。另外，从工艺优化角度考察了不同预处理方式和进水模式对MD工艺运行的影响，结果表明，混凝沉淀预处理方式能够有效减缓膜结垢，在168 h的运行周期下PTFE膜通量仅下降了35%；与持续浓缩的进水模式相比，间歇进水初期的膜通量下降幅度更大，但每24 h稀释进料后都出现膜通量突增使整体产水量高于连续进水模式总量的5%左右。采用SEM和FTIR分析得出，PTFE膜污染成因是无机盐结晶和腐殖酸类有机污染。
Abstract:
This paper investigated the performance of membrane distillation (MD) process with hydrophobic membranes made of polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE) and polypropylene (PP) for treating filter backwash wastewater. The PTFE membrane showed the best performance, maintained a permeable flux of (15.2±0.8) L/(m2·h) at temperature of 60 ℃, and stably rejected 99% of inorganic ions and more than 80% of organic pollutants. In addition, the effects of different pretreatment methods and feeding modes on MD process operation were investigated from the perspective of process optimization. Coagulation and precipitation pretreatment effectively slowed down membrane fouling, and the flux of PTFE membrane only decreased by 35% during 168 h operating cycle. Compared with the continuous concentration feeding mode, the membrane flux at the initial stage of intermittent feeding mode decreased more sharply, but the flux suddenly increased every 24 h after diluting the influent, making the overall water yield 5% higher than that of continuous feeding mode. The SEM and FTIR analysis showed that the PTFE membrane fouling was attributed to inorganic salt crystallization and humic acid organic pollution.

相似文献/References:

[1]林旭,刘彩虹,刘乾亮,等.膜蒸馏技术处理工业废水研究进展[J].中国给水排水,2022,38(10):46.
　LINXu,LIUCai-hong,LIUQian-liang,et al.Research Progress on Membrane Distillation Technology in Industrial Wastewater Treatment[J].China Water & Wastewater,2022,38(9):46.

更新日期/Last Update: 2024-05-01