School of Life Science, Shanxi University, Taiyuan 030006, China.
School of Life Science, Shanxi University, Taiyuan 030006, China.
Bioresour Technol. 2016 Apr;205:111-7. doi: 10.1016/j.biortech.2016.01.047. Epub 2016 Jan 23.
The flocculating ability was an important property to microalgal harvesting, especially in secondary effluent. In this study, the flocculating ability of two microalgae, Chlorococcum sp. GD and Parachlorella kessleri TY, was evaluated after 10d of cultivation in secondary effluent. After 180min of settling, the flocculating ability of Chlorococcum sp. GD and P. kessleri TY was 84.43% and 16.23%, respectively. It was suggested that Chlorococcum sp. GD was an excellent self-flocculating microalgae. The mechanism on self-flocculating of Chlorococcum sp. GD was probably related to hydrophobic extracellular polymeric substances (EPS). Besides, compared to P. kessleri TY, the nitrogen and phosphorus removal efficiency of Chlorococcum sp. GD was high, which was up to 66.51% and 74.19%, respectively. Chlorococcum sp. GD also had high lipid content and biomass concentration. Therefore, Chlorococcum sp. GD could be regarded as a promising candidate for microalgal cultivation and harvesting in secondary effluent.
絮凝能力是微藻收获的一个重要特性，特别是在二级出水。在这项研究中，在二级出水中培养 10 天后，评估了两种微藻——绿球藻 GD 和盐生杜氏藻 TY 的絮凝能力。沉淀 180min 后，绿球藻 GD 和盐生杜氏藻 TY 的絮凝能力分别为 84.43%和 16.23%。这表明绿球藻 GD 是一种优良的自絮凝微藻。绿球藻 GD 自絮凝的机制可能与疏水性胞外聚合物（EPS）有关。此外，与盐生杜氏藻 TY 相比，绿球藻 GD 的氮磷去除效率较高，分别达到 66.51%和 74.19%。绿球藻 GD 的脂质含量和生物量浓度也很高。因此，绿球藻 GD 可以作为在二级出水中进行微藻培养和收获的有前途的候选藻种。
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