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针对玄武岩纤维作为生物接触氧化载体材料的性能需求,采用乙酸乙酯纳米Si O_2分散液对其进行表面改性。通过扫描电镜、红外光谱分析、比表面积分析进行表征,以实际挂载的微生物膜量以及COD和NH_3—N去除率来评价改性的效果。改性结果表明:玄武岩纤维表面粗糙度增加,比表面积增加,含氧官能团增加;与未经过改性的玄武岩纤维相比,每克玄武岩纤维实际挂载的微生物膜量增加了21.39%;处理过程中平均每个时间段内COD以及NH_3—N去除效率分别提高了8.1%和6.2%。
According to the performance requirements of basalt fiber as bio-contact oxidation carrier material, the surface modification was carried out using ethyl acetate nano-Si O 2 dispersion. The results of scanning electron microscopy, infrared spectroscopy and specific surface area analysis were used to evaluate the effect of modification by the amount of immobilized microorganisms and COD and NH_3-N removal rate. The results showed that the surface roughness of basalt fibers increased, the specific surface area increased, and the oxygen-containing functional groups increased. Compared with the unmodified basalt fiber, the amount of biofilm actually loaded per gram of basalt fiber increased by 21.39% The average removal efficiency of COD and NH_3-N in each time period increased by 8.1% and 6.2% respectively.