Key Laboratory of Industrial Ecology and Environmental Engineering of Ministry of Education, School of Environmental and Biological Science and Technology, No 2 Linggong Road, Dalian University of Technology, Dalian 116023, PR China.
Bioresour Technol. 2010 Jul;101(14):5469-74. doi: 10.1016/j.biortech.2010.01.126. Epub 2010 Mar 3.
To prepare a high flux and antifouling filtration membrane used for submerged membrane bioreactors, non-woven fabric (NWF) was modified by coating chitosan (CS) on both internal and outer surface. Chemical structural and morphological changes were characterized. The changes of surface free energy were monitored by dynamic contact angle, which showed an increase after modification. The CS/NWF composite membranes were found to be with high flux, high effluent quality and excellent antifouling property. The results of fouling resistance distribution indicated that irreversible fouling resistance was decreased by coating CS. Especially, there were fewer gel layers existing on the outer surface. The adsorption of EPS on the NWF membrane internal surface decreased after being coated with CS. Modification improved filtration performance, and made fouling less troublesome and membrane regeneration efficient.
为了制备用于浸没式膜生物反应器的高通量、抗污染过滤膜，本文采用壳聚糖（CS）对内、外表面进行改性，制备了非织造布（NWF）。对化学结构和形态变化进行了表征。通过动态接触角监测到表面自由能的变化，改性后表面自由能增加。CS/NWF 复合膜具有高通量、出水水质好和优异的抗污染性能。污染阻力分布的结果表明，CS 涂层降低了不可逆污染阻力。特别是，在外表面上存在的凝胶层较少。CS 涂层后，EPS 在 NWF 膜内表面上的吸附减少。改性提高了过滤性能，减少了污染问题，提高了膜的再生效率。
