College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316000, China; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
Bioresour Technol. 2014 Sep;167:441-6. doi: 10.1016/j.biortech.2014.06.042. Epub 2014 Jun 18.
This study investigated the microalgae biomass production and nutrients removal efficiency from treated sewage by newly developed membrane photobioreactor in which Chlorella vulgaris was cultured in batch flow mode. Its performance was compared with conventional photobioreactor. The results show that the volumetric microalgae productivity was 39.93 and 10.36 mg L(-1)d(-1) in membrane photobioreactor and conventional photobioreactor, respectively. The nutrients removal rate in membrane photobioreactor was 4.13 mg N L(-1)d(-1) and 0.43 mg P L(-1)d(-1), which was obviously higher than that in conventional photobioreactor (0.59 mg N L(-1)d(-1) and 0.08 mg P L(-1)d(-1)). The better performance of membrane photobioreactor was due to the submerged membrane module in the reactor which acted as a solid-liquid separator and thereby enabled the reactor to operate with higher supply flow rate of cultivation medium. Moreover, in the outflow stage of the membrane photobioreactor, the microalgae culture liquor in the reactor could be further concentrated.
本研究采用新型膜光生物反应器，以普通小球藻为实验藻种，在批次流模式下培养微藻，考察了该生物反应器处理污水和去除污水中营养盐的效能，并与传统光生物反应器进行了对比。结果表明，在膜光生物反应器中藻细胞的比生长速率为 39.93mg/L·d，在传统光生物反应器中藻细胞的比生长速率为 10.36mg/L·d。在膜光生物反应器中，氮和磷的去除率分别为 4.13mgN/L·d 和 0.43mgP/L·d，明显高于传统光生物反应器中的去除率（0.59mgN/L·d 和 0.08mgP/L·d）。膜光生物反应器具有更好的性能，这是因为在反应器中采用了浸没式膜组件，它起到了固液分离器的作用，从而使反应器能够以更高的培养液供给流速运行。此外，在膜光生物反应器的出水阶段，反应器内的微藻培养液可以进一步浓缩。
