Department of Civil and Environmental Engineering, University of Missouri, Columbia, MO 65211, USA.
Department of Chemical Engineering, University of Missouri, Columbia, MO 65211, USA.
Bioresour Technol. 2014 Feb;153:383-7. doi: 10.1016/j.biortech.2013.12.026. Epub 2013 Dec 14.
An algae-based membrane bioreactor (A-MBR) was evaluated for high-density algae cultivation and phosphorus (P) removal. The A-MBR was seeded with Chlorella emersonii and operated at a hydraulic retention time of 1day with minimal biomass wastage for about 150days. The algae concentration increased from initially 385mg/L (or 315mg biomass COD/L) to a final of 4840mg/L (or 1664mg COD/L), yielding an average solids (algae biomass+minerals) production rate of 32.5gm(-3)d(-1) or 6.2gm(-2)d(-1). The A-MBR was able to remove 66±9% of the total P from the water while the algal biomass had an average of 7.5±0.2% extracellular P and 0.4% of intracellular P. The results suggest that algae-induced phosphate precipitation by algae is key to P removal and high-density algae cultivation produces P-rich algal biomass with excellent settling properties.
采用基于藻类的膜生物反应器（A-MBR）来进行高密度藻类培养和除磷。该 A-MBR 以 Chlorella emersonii 为种源，水力停留时间为 1 天，最小化生物量损失，运行约 150 天。藻类浓度从最初的 385mg/L（或 315mg 生物质 COD/L）增加到最终的 4840mg/L（或 1664mg COD/L），平均固体（藻类生物质+矿物质）生成速率为 32.5gm(-3)d(-1)或 6.2gm(-2)d(-1)。A-MBR 能够从水中去除 66±9%的总磷，而藻类生物质的平均胞外磷含量为 7.5±0.2%，胞内磷含量为 0.4%。结果表明，藻类诱导的磷酸盐沉淀是除磷和高密度藻类培养的关键，并且富含磷的藻类生物质具有良好的沉淀性能。
