TY - JOUR
T1 - The culture of Chlorella vulgaris in a recycled supernatant: Effects on biomass production and medium quality
AU - Hadj-Romdhane, F.
AU - Zheng, Xing
AU - Jaouen, Pascal
AU - Pruvost, Jérémy
AU - Grizeau, Dominique
AU - Croue, Jean-Philippe
AU - Bourseau, Patrick
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors thank Helene Marec (GEPEA UMR-CNRS 6144) and Jean-Luc Hauser for photobioreactor design and their technical support.
PY - 2013/3
Y1 - 2013/3
N2 - Reusing supernatant of microalgae culture medium can have inhibitory or toxic effects on the biomass production because of the release of organic metabolites by cells in the culture medium during their growth. This work investigated the impact of Chlorella vulgaris medium recycling on culture productivity, cells quality and accumulation of excreted metabolites in the culture medium. No significant impact on the C. vulgaris growth was observed after 63days of recycling, the productivity remained stable at around 0.55kgm-3day-1. Organic matters accumulated in supernatant were identified as biopolymers (BP) poor in nitrogen and with a size above 40kDa (probably polysaccharides), and small organic molecules (SOM) richer in nitrogen with a molecular size ranging from 1 to 3kDa. The concentration of biopolymers in the supernatant increased till to a maximum and then decreased, possibly consumed by bacteria, whereas small organic compounds accumulated in the medium. © 2013 Elsevier Ltd.
AB - Reusing supernatant of microalgae culture medium can have inhibitory or toxic effects on the biomass production because of the release of organic metabolites by cells in the culture medium during their growth. This work investigated the impact of Chlorella vulgaris medium recycling on culture productivity, cells quality and accumulation of excreted metabolites in the culture medium. No significant impact on the C. vulgaris growth was observed after 63days of recycling, the productivity remained stable at around 0.55kgm-3day-1. Organic matters accumulated in supernatant were identified as biopolymers (BP) poor in nitrogen and with a size above 40kDa (probably polysaccharides), and small organic molecules (SOM) richer in nitrogen with a molecular size ranging from 1 to 3kDa. The concentration of biopolymers in the supernatant increased till to a maximum and then decreased, possibly consumed by bacteria, whereas small organic compounds accumulated in the medium. © 2013 Elsevier Ltd.
UR - http://hdl.handle.net/10754/562670
UR - https://linkinghub.elsevier.com/retrieve/pii/S0960852413000485
UR - http://www.scopus.com/inward/record.url?scp=84873630934&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2013.01.025
DO - 10.1016/j.biortech.2013.01.025
M3 - Article
C2 - 23411460
SN - 0960-8524
VL - 132
SP - 285
EP - 292
JO - Bioresource Technology
JF - Bioresource Technology
ER -