The culture of Chlorella vulgaris in a recycled supernatant: Effects on biomass production and medium quality
Type
ArticleAuthors
Hadj-Romdhane, F.Zheng, Xing
Jaouen, Pascal
Pruvost, Jérémy
Grizeau, Dominique
Croue, Jean-Philippe
Bourseau, Patrick
KAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionEnvironmental Science and Engineering Program
Water Desalination and Reuse Research Center (WDRC)
Date
2013-03Permanent link to this record
http://hdl.handle.net/10754/562670
Metadata
Show full item recordAbstract
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.Sponsors
The authors thank Helene Marec (GEPEA UMR-CNRS 6144) and Jean-Luc Hauser for photobioreactor design and their technical support.Publisher
Elsevier BVJournal
Bioresource TechnologyPubMed ID
23411460ae974a485f413a2113503eed53cd6c53
10.1016/j.biortech.2013.01.025
Scopus Count
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