Real time light intensity based carbon dioxide feeding for high cell-density microalgae cultivation and biodiesel production in a bubble column photobioreactor under outdoor natural sunlight
| Autor: | Venkateswara R. Naira, Soumen K. Maiti, Debasish Das |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Environmental Engineering Biomass Photobioreactor Bioengineering Chlorella 010501 environmental sciences 01 natural sciences Photobioreactors Bioenergy 010608 biotechnology Microalgae Bioreactor Waste Management and Disposal 0105 earth and related environmental sciences Biodiesel Renewable Energy Sustainability and the Environment General Medicine Carbon Dioxide Pulp and paper industry Lipids Light intensity Biofuel Biofuels Biodiesel production Sunlight Environmental science |
| Zdroj: | Bioresource Technology. 284:43-55 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2019.03.102 |
| Popis: | Outdoor high cell-density microalgae cultivation is highly challenging due to unavailability of appropriate CO2 feeding strategy under diurnal sunlight intensities. Hence, a novel real time light based CO2 feeding strategy was firstly developed under diurnal simulated sunlight (LED) to test on Chlorella sp. in a 10 L scale bubble column photobioreactor. The strategy yielded a biomass titer of 5.12 g L−1 under simulated sunlight, far higher than existing biomass-density and pH-control based CO2 feeding strategies. In outdoor culturing, the proposed feeding strategy yielded high biomass titers of 6.8 and 9.0 g L−1 in growth-phase of two-stage and single-stage lipid induction studies respectively with same biomass productivity of 0.8 g L−1 day−1. Subsequently, two-stage lipid induction strategy of 6.8 g L−1 titer yielded biodiesel productivity of 120 g L−1 day−1, whereas single-stage strategy of 9.0 g L−1 titer was unable to induce lipid. Moreover, specific light availability affects the lipid production. |
| Databáze: | OpenAIRE |
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