This study aimed to investigate the harvesting of microalgae by microfiltration (MF) on a ceramic membrane at relatively high cross-flow velocity (CFV) of interest for commercial processes. Pilot-scale harvesting was conducted with algal suspensions (Chlorella vulgaris and Tisochrysis lutea (T-Iso)) and algal supernatants (Porphyridium cruentum) to assess the effect of feedstock characteristics and understand flux decline mechanisms. In total recycle mode (C. vulgaris, 1 g/L), high steady-state permeation flux around 200 L/m²/h was achieved. Total filtration resistance was mainly due to cake resistance (R_c, 57%) and pore adsorption and blocking (R_a, 40%). The process hydrodynamic conditions seemed to have relatively little effect on Chlorella cell integrity. In concentration mode, average permeate flux decreased from 441 to 73 L/m²/h with increasing feed concentration (C. vulgaris, 0.25–1 g/L); the contribution of R_c decreased (82 to 57%), while that of R_a rose (7 to 40%). With T-Iso suspensions and P. cruentum supernatants at 1 g/L, average permeate flux was 59 and 49 L/m²/h, respectively, with predominance of R_c and R_a, respectively. Distinct fouling mechanisms were inferred to explain the superior filterability of C. vulgaris. The results show that ceramic membrane MF at relatively high CFV could be a suitable option for harvesting certain microalgae including C. vulgaris.

这项研究旨在研究通过微滤（MF）在陶瓷膜上以感兴趣的相对较高横流速度（CFV）进行商业化生产来收获微藻。用藻类悬浮液（小球藻和黄粉虫（T-Iso））和藻类上清液（Cruphyridium cruentum）进行中试收获，以评估原料特性的影响并了解通量下降的机理。在总循环模式下（寻常梭状芽孢杆菌，1 g / L），实现了约200 L / m ² / h的高稳态渗透通量。总过滤阻力主要是由于滤饼阻力（R _c，57％）和孔吸附和阻塞（R_a，占40％）。过程的流体动力学条件似乎对小球藻的细胞完整性影响相对较小。在浓缩模式下，随着饲料浓度的增加，平均渗透通量从441降低至73 L / m ² / h（菜豆，0.25-1 g / L）。的贡献ř _Ç下降（82至57％），而的ř_一个玫瑰（7至40％）。对于T-Iso悬浮液和P.ruentum上清液，其浓度为1 g / L，平均渗透通量分别为59 L / m ² / h和R _c和R _a， 分别。推论出不同的结垢机理来解释寻常棉的优良过滤性。结果表明，CFV较高的陶瓷膜MF可能是收获包括寻常藻在内的某些微藻的合适选择。