Assessment of a photobioreactor-coupled modified Robbins device to compare the adhesion of Nannochloropsis gaditana on different materials
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URI: http://hdl.handle.net/10835/15305
ISSN: 2211-9264
DOI: https://doi.org/10.1016/j.algal.2018.12.008
ISSN: 2211-9264
DOI: https://doi.org/10.1016/j.algal.2018.12.008
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Zeriouh, Ouassim; Reinoso Moreno, Jose Vicente; López-Rosales, Lorenzo; Cerón-García, María del Carmen; Sánchez Mirón, Asterio; [et al.]Date
2018-12-06Abstract
The prevention of biofouling in the inner walls of closed photobioreactors (PBRs) becomes a critical step in improving the performance of photosynthetic microalgae bioprocesses. Selection of antifouling materials implies approaches at laboratory scale. This work reports the use of a flow cell of the modified Robbins device (MRD) type coupled to a PBR, operated in both batch and continuous modes with the model marine microalgae Nannochloropsis gaditana to study the biofouling formation on diverse materials. The fluid-dynamics within the MRD was studied via CFD-aided simulations. At separation distances lower than the cells' diffusion layer thickness, a diffusion-controlled transport of the cells to the material surface was postulated. Results suggested that the flow density of cells in the MRD (Jz), governed by cell concentration gradients, is a significant factor in the adhesion intensity (B) when the PBR is operated in batch mode; not in the continuous mode where the differences obser...
Palabra/s clave
nannochloropsis gaditana
Photobioreactor
biofouling
modified robbins device
computational fluid dynamics