Xie Yawei, Fang Yichen, Chen Dashan, Wei Jiahang, Fan Chengyue, Zhu Xiwang, Liu Hongyuan
College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
Taizhou Research Institute of Intelligent Construction on Coastal Soft Soils, Zhejiang University of Technology, Hangzhou 310032, China.
Membranes (Basel). 2025 Jul 27;15(8):225. doi: 10.3390/membranes15080225.
A comparative study was conducted to investigate membrane fouling control and treatment performance using natural surface water as the feed source. The evaluated processes included: (1) direct filtration-tubular ceramic membrane (DF-TCM, control); (2) coagulation-tubular ceramic membrane (C-TCM); and (3) coagulation-tubular ceramic membrane with concentrate recycling (C-TCM-CR). Experimental results demonstrated that under constant flux operation at 75 L/(m·h) for 8 h, the C-TCM-CR process reduced the transmembrane pressure (TMP) increase by 83% and 35% compared to DF-TCM and C-TCM, respectively. Floc size distribution analysis and cake layer characterization revealed that the C-TCM-CR process enhanced coagulation efficiency and formed high-porosity cake layers on membrane surfaces, thereby mitigating fouling development. Notably, the coagulation-assisted processes demonstrated improved organic matter removal, with 13%, 10%, and 10% enhancement in COD, UV, and medium molecular weight organics (2000-10,000 Da) removal compared to DF-TCM, along with a moderate enhancement in fluorescent substances removal efficiency. All three processes achieved over 99% turbidity removal efficiency, as the ceramic membranes demonstrate excellent filtration performance.
进行了一项比较研究，以调查使用天然地表水作为进水水源时的膜污染控制和处理性能。评估的工艺包括：（1）直接过滤-管式陶瓷膜（DF-TCM，对照）；（2）混凝-管式陶瓷膜（C-TCM）；以及（3）带有浓缩液循环的混凝-管式陶瓷膜（C-TCM-CR）。实验结果表明，在75 L/(m²·h) 的恒定通量下运行8小时，与DF-TCM和C-TCM相比，C-TCM-CR工艺分别将跨膜压力（TMP）的增加降低了83%和35%。絮体尺寸分布分析和滤饼层表征表明，C-TCM-CR工艺提高了混凝效率，并在膜表面形成了高孔隙率的滤饼层，从而减轻了膜污染的发展。值得注意的是，混凝辅助工艺显示出有机物去除效果得到改善，与DF-TCM相比，化学需氧量（COD）、紫外线吸光度（UV）和中等分子量有机物（2000-10000 Da）的去除率分别提高了13%、10%和10%，同时荧光物质的去除效率也有适度提高。由于陶瓷膜具有优异的过滤性能，所有三种工艺的浊度去除效率均超过99%。
