title: Modeling the competition between antenna size mutant and wild type microalgae in outdoor mass culture.
abstract: Under high light conditions, microalgae are oversaturated with light which significantly reduces the light use efficiency. Microalgae with a reduced pigment content, antenna size mutants, have been proposed as a potential solution to increase the light use efficiency. The goal of this study was to investigate the competition between antenna size mutants and wild type microalgae in mass cultures. Using a kinetic model and literature-derived experimental data from wild type Chlorella sorokiniana, the productivity and competition of wild type cells and antenna size mutants were simulated. Cultivation was simulated in an outdoor microalgal raceway pond production system which was assumed to be limited by light only. Light conditions were based on a Mediterranean location (Tunisia) and a more temperate location (the Netherlands). Several wild type contamination levels were simulated in each mutant culture separately to predict the effect on the productivity over the cultivation time of a hypothetical summer season of 100days. The simulations demonstrate a good potential of antenna size reduction to increase the biomass productivity of microalgal cultures. However, it was also found that after a contamination with wild type cells the mutant cultures will be rapidly overgrown resulting in productivity loss.
authors.affiliation: Bioprocess Engineering, AlgaePARC, Wageningen University, PO box 16, 6700 AA, Wageningen, The Netherlands. Electronic address: timdemooij@gmail.com.
authors.forename: Tim
authors.initials: T
authors.lastname: de Mooij
authors.affiliation: Bioprocess Engineering, AlgaePARC, Wageningen University, PO box 16, 6700 AA, Wageningen, The Netherlands.
authors.forename: Kira
authors.initials: K
authors.lastname: Schediwy
authors.affiliation: Bioprocess Engineering, AlgaePARC, Wageningen University, PO box 16, 6700 AA, Wageningen, The Netherlands; Biosciences and Aquaculture, Nord University, Bodø, 8049, Norway.
authors.forename: René H
authors.initials: RH
authors.lastname: Wijffels
authors.affiliation: Bioprocess Engineering, AlgaePARC, Wageningen University, PO box 16, 6700 AA, Wageningen, The Netherlands.
authors.forename: Marcel
authors.initials: M
authors.lastname: Janssen
mesh_terms: D018533:Biomass; D002708:Chlorella / Q000235:genetics* / Q000648:ultrastructure; D005818:Genetic Engineering; D007700:Kinetics; D008027:Light; D058086:Microalgae / Q000235:genetics; D008957:Models, Genetic; D009154:Mutation; D009426:Netherlands; D058433:Photobioreactors; D010788:Photosynthesis / Q000235:genetics; D014416:Tunisia
keywords: Antenna size mutant; Areal biomass productivity; Chlorella sorokiniana; Competition; Photosynthetic efficiency