In this study, a vertical-algal-biofilm-enhanced raceway pond (VAB-enhanced raceway pond) was designed and assessed for wastewater treatment and algal biomass production under different nutrient loading rates. Results indicated that the maximum removal capacity of the system was accordingly 7.52, 6.76 and 0.11 g·m·day for COD, TN and TP, under which the wastewater effluent concentration could be respectively reduced from 106.00, 92.71 and 1.48 mg/L to 43.5, 11.03 and 0.46 mg/L in continuous mode. Meanwhile, about 7.47–10.10 t·ha·year of lipid, 14.85–23.01 t·ha·year of protein and 10.69–14.20 t·ha·year of carbohydrate could be produced from the algae by the system in large scale. The corresponding estimated stoichiometric-methane-potential and biodiesel production of the harvested biomass was 21,471–29,136 m·ha·year and 0.57–1.15 t·ha·year, respectively. The findings of this study demonstrate the feasibility of using VAB-enhanced raceway pond for economically and cost-effectively recovery of nutrients from the wastewater via algal-based byproducts production.

中文翻译：

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垂直藻类生物膜强化跑道池的运行，用于不同废水负荷下的营养物去除和微藻副产品的生产


在本研究中，设计并评估了垂直藻类生物膜增强型跑道池（VAB-增强型跑道池）在不同养分负荷率下的废水处理和藻类生物量生产。结果表明，系统对COD、TN、TP的最大去除能力分别为7.52、6.76和0.11 g·m·day，废水出水浓度分别由106.00、92.71和1.48 mg/L降低至43.5 、11.03 和 0.46 mg/L（连续模式）。同时，该系统可大规模生产约7.47-10.10 t·ha·年的脂质、14.85-23.01 t·ha·年的蛋白质和10.69-14.20 t·ha·年的碳水化合物。收获的生物质相应的估计化学计量甲烷潜力和生物柴油产量分别为 21,471–29,136 m·ha·年和 0.57–1.15 t·ha·年。本研究的结果证明了使用 VAB 增强型水道池通过藻类副产品生产从废水中经济且具有成本效益地回收营养物质的可行性。