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Developing microporous fibrous-diaphragm aerator to decrease bubble generation diameter for improving microalgal growth with CO 2 fixation in a raceway pond.
- Source :
-
Bioresource technology [Bioresour Technol] 2019 Mar; Vol. 276, pp. 28-34. Date of Electronic Publication: 2018 Dec 26. - Publication Year :
- 2019
-
Abstract
- A novel microporous fibrous-diaphragm aerator (FDA) was proposed to generate pressurized gas with check valve to penetrate through millions of micropores (6-126 μm) of expanded fibrous diaphragm on internal support, thus decreasing bubble generation diameter and increasing bubble residence time for improving microalgal growth with CO <subscript>2</subscript> fixation in a raceway pond. When installation angle of FDA internal support increased from 0° to 45°, bubble generation time and diameter first decreased (to valley bottoms of 4 ms and 0.45 mm at 22°) and then increased. Compared to traditional strip aerator, bubble generation time and diameter decreased by 50% and 60% through FDA with support installation angle of 22° and average pore diameter of 28 µm, while gas-solution mixing time decreased by 22% and mass transfer coefficient increased by 40%, leading to increased actual photochemical efficiency (by 80%) and increased biomass yield (by 38.5%) of Arthrospira cells with pure CO <subscript>2</subscript> aeration through FDA.<br /> (Copyright © 2018 Elsevier Ltd. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 276
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 30605836
- Full Text :
- https://doi.org/10.1016/j.biortech.2018.12.090