膜曝气提升菌藻生物膜反应器效能及稳定性

比较曝气头曝气以及膜曝气两种曝气方式支持的菌藻共生系统在不同的运行条件下对污染物的去除效能，探讨去除机理。结果表明，以膜曝气为基础的MABAR对氨氮、总氮、磷、化学需氧量（COD）的去除负荷相对于以曝气头曝气为基础的HABAR，最高分别提升1.44、21.22、3.08、52.09 kg/m²/m³。藻类积累方面，MABAR在5个阶段的积累量都高于HABAR，最高提升15.17 mg/cm²。这不但归因于膜曝气良好的无吹脱和高效的碳化能力为自养藻类提供了充足的无机碳，而且膜曝气为一些十分有利于藻类生长的细菌，例如Acidovorax、Rhodobacter和Acinetobacter，提供了良好的生存环境。MABAR不但能够提升去除效能，还能够促使光生物膜反应器抵抗冲击，维持稳定，这对未来光生物反应器的实际应用提供了一种新的运行方式。

Membrane aeration enhances the performance and stability of the bacterial-algae biofilm reactor

The pollutant removal efficiencies of the bacterial-algae symbiotic system supported by head aeration and membrane aeration under different operating conditions were compared to explore the removal mechanism. Results showed that, in the MABAR (based on membrane aeration), the removal rate of NH₄⁺-N, total nitrogen (TN), PO₄sup>3--P, and COD were soared by 1.44,21.22,3.08,52.09 kg/m²/m³, respectively, compared to HABAR (based on aeration head aeration).In terms of algae accumulation, the algae accumulation concentration of MABAR in 5 stages are higher than that of HABAR, with a highest increased concentration by 15.17 mg/cm². These phenomena not only due to no-stripping and high carbonization ability of membrane aeration to provide sufficient inorganic carbon for autotrophic algae, but membrane aeration also provides a good living environment for the bacteria which has the function to stimulate algae growth, such as Acidovorax, Rhodobacter and Acinetobacter. In summary, MABAR can not only promote the removal efficiency, but also help the photobioreactor to resist shock and maintain stability. This new reactor provides a new operating mode for the practical application of the photobioreactor in the future.