In the bacteria-algae (BA) system, the amount of oxygen produced by the algae is always insufficient for the organic carbon degradation, resulting in less inorganic carbon (IC) production. Meanwhile, the conventional extra aeration method always causes CO2 stripping and IC loss. Both two reasons limited the algae boosting. Membrane aeration (MA) has the excellent capability of organic carbon thorough degradation and gas blown-off control. In this study, MA-BA was employed to investigate the effect of organic carbon on the algae growth. Results showed that COD had a positive correlation with Chlorophyll-a (Chl-a) and algae proliferation in MA-BA system according to the redundancy analysis (RDA). The biggest Chl-a concentration (20.95 mg/cm2) occurred in R4 (COD = 400 mg/L). Stimulated algal population changed nutrient removal pathway from bacterial action to algae action. Meantime, Soared algae accumulation would selectively excite the abundance of bacteria that supported the algae growth, such as Acinetobacter, which exhibited a growing trend as the increase of influent COD, especially in the inner biofilm. This paper provided new insight into the effect of organic carbon on the algae in a novel MA-BA system, which will be helpful for future research.

中文翻译：

---

有机碳在基于膜曝气的细菌-藻类共生系统（MA-BA）中促进藻类增殖。

在细菌-藻类（BA）系统中，藻类产生的氧气量始终不足以降解有机碳，从而减少了无机碳（IC）的产生。同时，传统的额外曝气方法总是导致二氧化碳汽提和IC损失。这两个原因都限制了藻类的繁殖。膜曝气（MA）具有出色的有机碳彻底降解和吹气控制的能力。在这项研究中，MA-BA被用来研究有机碳对藻类生长的影响。结果表明，根据冗余分析（RDA），COD与MA-BA系统中的叶绿素a（Chl-a）和藻类增殖呈正相关。最大的Chl-a浓度（20.95 mg / cm2）出现在R4中（COD = 400 mg / L）。受刺激的藻类种群将营养去除途径从细菌作用转变为藻类作用。同时，海藻积累的猛增将选择性地激发大量支持藻类生长的细菌，例如不动杆菌，这种细菌随着进水COD的增加而呈增长趋势，特别是在内部生物膜中。本文提供了新的洞察力，通过一种新颖的MA-BA系统了解有机碳对藻类的影响，这将有助于未来的研究。