411841 Periodic Symmetry Defined Bioreactor

Wednesday, November 11, 2015: 8:30 AM
257B (Salt Palace Convention Center)
Yen-Hsun Tseng1, Samuel Doane2, Tyler Lee2, Leonard F. Pease III3, Swomitra Mohanty1, John McLennan1, Anthony Edward Butterfield1 and Rete Browning2, (1)Chemical Engineering, University of Utah, Salt Lake City, UT, (2)University of Utah, Salt Lake City, UT, (3)Chemical Engineering, Internal Medicine (Gastroenterology), and Pharmaceutics & Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT

A newly design periodic symmetry defined photobioreactor was tested by growing microalgae. This low cost, highly efficient photobioreactor was made up of evenly spaced nozzles that delivered fluid.  The periodic spacing of the nozzles resulted in distinct hexagonal cells that were defined by fluid dynamics with no physical wall.  .Since the reactors consists of simple nozzles and pumps, this reduces the construction costs and simplifies maintenance and operation. The periodic design increases the scalability which is the main drawback of the traditional photobioreactor. Three different photobioreactor configurations were tested: a single cell, seven cell and nineteen cell. The same concentration of microalgae was grown in all three reactors under the same conditions. Productivity of the photobioreactor was assessed by taking 150 ml samples from three different reactors every day. The optical density, oil density, and cell number were measured by UV-vis spectrometry and hemocytometry. The cell number for each reactor after two weeks are 0.308 cell/ml (single), 0.384 (cell/ml) (seven), and 0.339 cell/ml (nineteen). The transmittance for three reactors after two weeks are 82.78% (single), 81.4% (seven), and 82.05% (nineteen). Base on the data scalability of the reactor design was shown.  Details on reactors and design and microalgae conditions (including nitrogen content, dry biomass and oil density) will be presented.

Extended Abstract: File Not Uploaded
See more of this Session: Advances in Algal Biorefineries I
See more of this Group/Topical: Sustainable Engineering Forum