| Autor: |
Jai Sankar Seelam, Marcella Fernandes de Souza, Peter Chaerle, Bernard Willems, Evi Michels, Wim Vyverman, Erik Meers |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Chemosphere. 290:133180 |
| ISSN: |
0045-6535 |
| DOI: |
10.1016/j.chemosphere.2021.133180 |
| Popis: |
The integration of phototrophic microalgal production and anaerobic digestion can recycle excess nutrients across European surplus hotspots to produce protein-rich biomass for nutritional applications. However, the challenging physico-chemical properties of raw digestate constrain microalgal growth and limit digestate valorization potential. This study focused on the pre-treatment of food waste-based digestate using paper-filtration to improve its properties for cultivating Desmodesmus sp. and Chlorella vulgaris. The microalgal growth performance in paper-filtered digestate (PFD, 10 μm-pore size) was then compared to growth in membrane-filtered digestate (MFD, 0.2 μm-pore size). A microplate-based screening coupled with Cytation device assessment of PFD and MFD samples after dilution and with/without phosphorus supplementation showed that PFD was the best substrate. Moreover, phosphorus supplementation resulted in improved growth at higher digestate concentrations (5-10% v/v PFD), indicating the importance of using a balanced growth medium to increase the volumetric usage of digestate. Results were validated in a 3-L bioreactor at 10% PFD with phosphorus supplementation, reaching a biomass concentration of 2.4 g L |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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