炭纤维生物膜的形成机制 Ⅱ .炭纤维表面特性对微生物活性与增殖的影响

The formation mechanism of carbon fiber biofilmⅡ. Effects of carbon fiber surface characteristic on the activity and multiplication of microorganism

采用对比方法,借助化学分析、表面形态分析、微生物活性测定等技术首次系统地研究了以活性炭纤维、表面改性活性炭纤维作为细胞固着化用载体及载体表面特性对生物膜活性、菌液中微生物活性及增殖等的影响。重点考察了纤维表面官能团、比表面积、润湿性等表面特性对生物膜活性以及菌液中微生物活性及增殖等的影响。研究结果表明:(1)改善炭纤维表面的吸附特性有益于微生物固着及挂膜;增加活性炭纤维比表面积有利于提高其表面微生物的活性。(2)与其他有机高分子材料相比炭纤维可以促进微生物的生长。(3)炭纤维表面润湿性与某些酸性官能团的增加,有助于载体表面微生物的生长。

Using contrast, chemical analysis, surface morphological analysis and mensuration of microorganism activity and other techniques, the surface characteristics of activated carbon fibers and surfacemodified activated carbon fibers, which had been used as a biofilm carrier were studied. The effects of the surface characteristics on biofilm activity and activity and multiplication of microorganisms in active sludge were also studied. The emphasis was to examine the effects of fiber surface functional groups, specific surface area, and wetting quality. Results showed that: (1) Improving the surface adsorption of the carbon fiber enhances the fixation of microorganisms on the surface, and increasing specific surface area is beneficial to enhance their activity. (2) In comparison with other organic polymer materials, carbon fibers are able to promote microorganism growth. (3) Increasing surface wetting quality and the introduction of acid functional groups on the fiber can help microorganism growth on the carrier surface.