生物强化MBR处理溴氨酸废水实验研究

Study of bioaugmented membrane bioreactor treating bromoamine acid wastewater

利用高效降解菌株Sphingomonas xenophagaQYY对MBR处理系统进行生物强化处理溴氨酸研究.对稳定运行的MBR体系进行了条件优化实验,考察了不同运行条件对生物降解性和生理状态指标等宏观功能的影响.确定了最优化的运行方式:进水溴氨酸浓度250 mg/L;不控温;曝气量0.8 L/min;水力停留时间14.5 h;pH=7.同时,采用现代分子指纹技术——核糖体基因间隔序列分析(RISA)揭示了菌群微观结构随系统操作参数变化而变化的规律.生物相分析表明,系统的游离污泥主要以杆状菌为主,而附着在中空纤维膜丝表面的菌体分为两层,第一层主要为丝状菌,第二层为含丝状菌、球状菌和杆状菌等多种形态的菌体.

The membrane bioreactor （MBR） bioaugmented by Sphingomonas scenophaga QYY with high degradability was used for treating bromoamine acid （BAA） wastewater. The optimal operation conditions were BAA concentration 250 mg/L, without temperature control, aeration amount 0.8 L/rain, hydraulic retention time 14.5 h, pH = 7. Ribosomal intergenic sequence analysis （RISA） was used to reveal that the community structure changed with the operational parameters. It suggests that the dominant species are Bacilus sp. in the suspended sludge, and microorganisms clicked on the hollow fibrous membrane contain two layers, the first is Filamentous sp., and the second one contains many species such as Filamentous sp. , Coccuss sp. , Bacilus sp. and so on.