Abstract:

The hybrid membrane bioreactor introduces suspended biofilm carriers into the membrane bioreactor (MBR). The microbial diversity and content with the functions of carbon reduction, nitrogen removal and phosphorus accumulation were analyzed under the optimal conditions respectively to investigate the reasons and the mechanism for the differences in decontamination efficiency between HMBR and MBR through high-throughput sequencing and related analysis software. Results showed that HMBR had better pollution removal performance than MBR, and the pollutant degradation mechanisms of MBR and HMBR were different. HMBR had more active microbial communities, which were with richer species, more evenly distributed, and larger quantities. And at the same time, relevant functional bacteria were more obviously presented in HMBR, especially the addition of suspended filler brought extra increment of functional bacteria, which promoted HMBR with better pollution removal performance.

Key words: membrane bioreactor, hybrid membrane bioreactor, microbial community structure, fuction bacteria, decontamination efficiency

摘要：

复合式膜生物反应器（Hybrid membrane bioreactor，HMBR）是在膜生物反应器（Membrane bioreactor，MBR）中引入悬浮生物膜载体。利用高通量测序及相关分析软件筛选出具有降碳、脱氮、除磷功能的微生物，对比HMBR、MBR内微生物群落结构差异，结合两种反应器各自最优工况下对污染物去除效果，探究二者除污效能存在差异的原因。试验结果表明，HMBR的除污性能优于MBR，且MBR与HMBR污染物降解机制不同。HMBR拥有更优运行性能的原因在于HMBR内部拥有物种更加丰富、分布更加均匀、数量更多的微生物群落，相关功能菌在HMBR内增殖明显，尤其是悬浮填料的投加带来了功能菌的额外增量，从而提升了HMBR的污染物降碳、脱氮、除磷效能。

关键词: 膜生物反应器, 复合式膜生物反应器, 微生物群落结构, 功能菌, 除污效能

CLC Number: 

• X703