title: Breathable waveguides for combined light and CO2 delivery to microalgae.
abstract: Suboptimal light and chemical distribution (CO2, O2) in photobioreactors hinder phototrophic microalgal productivity and prevent economically scalable production of biofuels and bioproducts. Current strategies that improve illumination in reactors negatively impact chemical distribution, and vice versa. In this work, an integrated illumination and aeration approach is demonstrated using a gas-permeable planar waveguide that enables combined light and chemical distribution. An optically transparent cellulose acetate butyrate (CAB) slab is used to supply both light and CO2 at various source concentrations to cyanobacteria. The breathable waveguide architecture is capable of cultivating microalgae with over double the growth as achieved with impermeable waveguides.
authors.affiliation: Department of Mechanical & Industrial Engineering and Institute for Sustainable Energy, University of Toronto, 5 King's College Road, Toronto, ON M5S 3G8, Canada.
authors.forename: Scott C
authors.initials: SC
authors.lastname: Pierobon
authors.affiliation: Department of Mechanical & Industrial Engineering and Institute for Sustainable Energy, University of Toronto, 5 King's College Road, Toronto, ON M5S 3G8, Canada.
authors.forename: Jason
authors.initials: J
authors.lastname: Riordon
authors.affiliation: Department of Mechanical & Industrial Engineering and Institute for Sustainable Energy, University of Toronto, 5 King's College Road, Toronto, ON M5S 3G8, Canada.
authors.forename: Brian
authors.initials: B
authors.lastname: Nguyen
authors.affiliation: Department of Mechanical & Industrial Engineering and Institute for Sustainable Energy, University of Toronto, 5 King's College Road, Toronto, ON M5S 3G8, Canada. Electronic address: sinton@mie.utoronto.ca.
authors.forename: David
authors.initials: D
authors.lastname: Sinton
mesh_terms: D056804:Biofuels; D018533:Biomass; D002245:Carbon Dioxide / Q000378:metabolism*; D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D003246:Conservation of Energy Resources; D008027:Light; D058086:Microalgae / Q000254:growth & development / Q000378:metabolism*; D058433:Photobioreactors
chemical_list: D056804:Biofuels; D002245:Carbon Dioxide; D002482:Cellulose; C014396:cellulose acetate-butyrate
keywords: Cyanobacteria; Membrane contactor; Microalgae; Photobioreactor; Waveguide