摘要
利用滤饼层过滤模型和膜孔窄化模型,结合国产中空纤维超滤膜对提取的天然腐植酸进行直接超滤和混凝—超滤2种工艺的试验结果分析,表明混凝预处理基本消除了膜孔污染,并且大大降低了膜表面滤饼层污染阻力,从而使超滤保持高渗透通量。另外,与原水直接超滤相比,混凝—超滤组合工艺对溶解性天然有机物的去除率较高,DOC去除率从28％提高到53％,UV_(254)去除率从40％提高到78％。
Using Theoretical membrane fouling model-pore narrowing model and cake filtration model to analyze the experimental results of ultrafiltration with and without coagulation pretreatment on removing natural organic matter. It showed that the natural organic molecules agglomerated to form micro-floes by pre-coagulation could avoid membrane pore fouling and reduce resistance of cake layer on the membrane surface. In companison with direct ultrafiltration and pretreatment with aluminum sulfate coagulant did improve removal of COD and UV254 from 28% and 40% to 53% and 78% respectively.
出处
《上海环境科学》
CAS
CSSCI
CSCD
北大核心
2002年第2期83-85,共3页
Shanghai Environmental Sciences
