Journal
JOURNAL OF BIOTECHNOLOGY
Volume 284, Issue -, Pages 102-114Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jbiotec.2018.08.006
Keywords
Marine microalgae; Centrate from anaerobic digestion; Nitrogen removal; Phosphorus removal; Flat-panel photobioreactors
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Funding
- EDARSOL Project - Spanish Government [CTQ2014-57293-C3]
- Junta de Andalucia [BIO 173]
- European Commission through the ERANET LAC Program by GreenBiorefinery project [ELAC2014/BEE-0357]
- European Union's Horizon 2020 Research and Innovation Program [727874 SABANA]
- Mexican National Council on Science and Technology (CONACyT)
- Erasmus+ traineeship program of the Universita di Ferrara
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The outdoor production of marine microalgae biomass in pilot scale flat panels photobioreactors, under not sterile conditions and using centrate as nutrients source, was studied. Experiments were performed modifying the centrate percentage, dilution rate and orientation of the photobioreactors. The strain Geitlerinema sp. was that one prevailing independently of the culture conditions. The higher productivity of 47.7 g(biomass)m(-2).day(-1) dry weight and photosynthetic efficiency of 2.8%, was achieved when using 20% centrate and a dilution rate of 0.3 day(-1), whatever the orientation of the reactor, maximal nutrient removal capacities of 82%, 85% and 100% for carbon, nitrogen and phosphorus being obtained. Under non-optimal conditions up to 80% of the nitrogen and 60% of the phosphorus were lost by stripping and precipitation, respectively. Carbohydrates was the major component of the biomass followed by proteins and lipids. These results support the possibility to produce microalgae biomass below 0.59 (sic)/kg, useful to produce biofertilizers and animal feed.
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