A hybrid process combining a single compartment aerobic membrane bioreactor (MBR) and a membrane microalgal reactor (MMR) was evaluated for nutrient removal and microalgal biomass production. When operated without biomass extraction, the microalgal biomass in the MMR reached 920 mg L⁻¹ on day 18 and then collapsed, rendering nutrient removal ineffective. Stable operation of the MMR was achieved by regular biomass extraction (i.e. 1/30 of the microalgal biomass in the reactor daily). The biomass production at steady state was approximately 26 g m⁻³ d⁻¹. The NO₃⁻ and PO₄³⁻ uptake values by microalgae were 4.0 ± 1.1 and 1.5 ± 0.9 g m⁻³ d⁻¹, respectively. A facile flocculation and separation technique capable of recovering 98% microalgal biomass was demonstrated. Although the hybrid process can significantly enhance nutrient removal and biomass production, further research is needed to intensify the microalgal growth rate. At the current microalgal growth rate, a large MMR volume (37 times that of the MBR) is necessary for synchronous operation.

中文翻译：

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顺序膜生物反应器，然后是膜微藻反应器，用于去除营养物和藻类生物质的产生

评估了结合了单室好氧膜生物反应器（MBR）和膜微藻反应器（MMR）的混合工艺的养分去除和微藻生物量的生产。当不进行生物量提取而操作时，MMR中的微藻生物量在第18天达到920 mg L ^-1，然后坍塌，导致营养去除效率低下。通过常规的生物质提取（即每天反应器中微藻生物质的1/30 ）实现MMR的稳定运行。稳态下的生物量产生为约26gm ^-3 d ^-1。的NO ₃ ^-和PO _4个^3-微藻摄取值分别为4.0±1.1和1.5±0.9克^-3d ^-1。证明了一种易于絮凝和分离的技术，能够回收98％的微藻生物质。尽管混合过程可以显着提高营养物质的去除和生物量的产生，但仍需要进一步研究以增强微藻的生长速度。在当前的微藻生长速率下，同步操作需要较大的MMR量（是MBR的37倍）。