微生物固定化酒糟多孔碳对亚甲基蓝吸附和降解性能研究

Adsorption and degradation of methylene blue by microbial immobilized distillers

摘要:

为了提高废弃酒糟资源化利用附加值,实现染料的高效吸附降解,本研究利用Bacillus massiliogabonensis菌株和酒糟多孔炭材料(DGPC)制备了用于去除印染废水中亚甲基蓝(MB)的微生物固定化酒糟多孔炭材料(Massibacillus-DGPC)。利用FTIR、EDS和SEM对Massibacillus-DGPC的结构进行了表征,通过批量实验研究了pH和盐度等环境因素对Massibacillus- DGPC脱色性能的影响,比较了在短期实验和长期循环利用中对MB的吸附和降解的性能。结果表明,在不同pH和盐度环境下Massibacillus- DGPC都能保持78%以上的脱色率。此外,对比其他处理组,Massibacillus-DGPC对MB的吸附降解能力和可再生能力更加优越。Massibacillus-DGPC在6轮循环利用中对MB的去除率达到99%以上,经过8轮循环后,对水中MB去除率仍高达92%以上,且实现了50%以上MB的彻底降解。研究显示,微生物固定化多孔酒糟炭对MB的吸附和降解性能较好,且可再生能力强。研究结果对于利用酒糟废弃物资源化、染料废水的处理提供技术支持。

Abstract:

In order to improve the additional value of waste distiller"s resource utilization and achieve efficient adsorption and degradation of dyes, the microbial immobilized porous charcoal (Massibacillus-DGPC) for the removal of methylene blue (MB) from dyeing wastewater was prepared by using Bacillus massiliogabonensis strain and porous charcoal material (DGPC). The FTIR, EDS and SEM were used to characterize The structure of Massibacillus-DGPC. The environmental factors such as pH and salinity on Massibacillus-DGPC adsorption and degradation methylene blue were studied. The results showed that though the adsorption process of Massibacillus-DGPC was affected by many factors, The decolorization rate can maintain more than 78% in different pH and salinity environments. In addition, compared with other treatment groups, Massibacillus-DGPC showed superior adsorption and degradation capacity and renewable capacity. The MB removal rate of Massibacillus-DGPC reached more than 99% in 6 rounds of recycling. After 8 rounds of recycling, the MB removal rate of Massibacillus-DGPC was still as high as more than 92%, and achieved The complete degradation of more than 50% MB. The microbe immobilized porous distiller"s grains charcoal has good adsorption and degradation performance of MB, and has strong renewable ability. The results have certain value for the efficient treatment of dye wastewater by recycling of distiller"s grains waste.