College of Biological Chemical Science and Engineering, Jiaxing University, Jiaxing, China.
Water Environ Res. 2019 Aug;91(8):679-688. doi: 10.1002/wer.1097. Epub 2019 Apr 1.
To investigate the effects of different microalgae and culture methods on the purification of domestic wastewater and biogas, Chlorella vulgaris and Scenedesmus obliquus were selected. Three different culture methods (monoculture, microalgal-fungi cocultivation, and microalgal-activated sludge cocultivation) were used to remove nutrients from four different domestic wastewaters and remove CO from raw biogas in a photobioreactor. The results show that the effluent from the centrate of pretreated urban wastewater (WW4) achieved the highest nutrient and CO removal efficiency. Cocultivation of C. vulgaris and activated sludge achieved the highest COD, TP, and CO removal efficiencies of 79.27%, 81.25%, and 60.39% with WW4, respectively. Cocultivation of C. vulgaris and fungi achieved the highest TN removal efficiency of 78.46% with WW4. The contents of C, N, and P in the microalgal-activated sludge symbiont after treatment exceeded 50%, 8%, and 0.8%, respectively. Highly economically efficient energy consumption was achieved with WW4 for both C. vulgaris and S. obliquus. Microalgal-activated sludge cocultivation was identified as the optimal option for the simultaneous purification of wastewater and biogas based on its high pollution and CO removal efficiency. This provides a reference for the microalgal-based purification of actual domestic wastewater and raw biogas. PRACTITIONER POINTS: Nutrient and CO were efficiently removed by C. vulgaris with activated sludge. CO was removed up to 60.4% and was economically viable. Cocultivation of C. vulgaris and fungi could achieve the highest TN removal with WW4.
为了研究不同微藻和培养方法对生活污水净化和沼气生物转化的影响，选择了普通小球藻和斜生栅藻。采用三种不同的培养方法（纯培养、微藻-真菌共培养和微藻-活性污泥共培养），在光生物反应器中从四种不同的生活污水中去除营养物质，并去除原沼气中的 CO。结果表明，预处理城市污水浓缩液（WW4）的出水达到了最高的营养物和 CO 去除效率。C. vulgaris 和活性污泥共培养在 WW4 条件下分别实现了最高的 COD、TP 和 CO 去除效率，分别为 79.27%、81.25%和 60.39%。C. vulgaris 和真菌共培养在 WW4 条件下实现了最高的 TN 去除效率，为 78.46%。处理后微藻-活性污泥共生体中的 C、N 和 P 含量分别超过 50%、8%和 0.8%。对于 C. vulgaris 和 S. obliquus 来说，使用 WW4 都实现了极高的经济效益和能量消耗。基于其高污染和 CO 去除效率，微藻-活性污泥共培养被确定为同时净化污水和沼气的最佳选择。这为基于微藻的实际生活污水和原沼气的净化提供了参考。
小球藻与活性污泥共培养可以高效去除营养物质和 CO。
去除 CO 最高可达 60.4%，且具有经济可行性。
小球藻和真菌共培养可以用 WW4 实现最高的 TN 去除率。
