Modelling of light and temperature influences on cyanobacterial growth and biohydrogen production

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Title: Modelling of light and temperature influences on cyanobacterial growth and biohydrogen production
Authors: Zhang, D
Dechatiwongse, P
Del Rio-Chanona, EA
Maitland, GC
Hellgardt, K
Vassiliadis, VS
Item Type: Journal Article
Abstract: Dynamic simulation is a valuable tool to assist the scale-up and transition of biofuel production from laboratory scale to potential industrial implementation. In the present study two dynamic models are constructed, based on the Aiba equation, the improved Lambert–Beer's law and the Arrhenius equation. The aims are to simulate the effects of incident light intensity, light attenuation and temperature upon the photo-autotrophic growth and the hydrogen production of the nitrogen-fixing cyanobacterium Cyanothece sp. ATCC 51142. The results are based on experimental data derived from an experimental setup using two different geometries of laboratory scale photobioreactors: tubular and flat-plate. All of the model parameters are determined by an advanced parameter estimation methodology and subsequently verified by sensitivity analysis. The optimal temperature and light intensity facilitating biohydrogen production in the absence of light attenuation have been determined computationally to be 34 °C and 247 μmol m− 2 s− 1, respectively, whereas for cyanobacterial biomass production they are 37 °C and 261 μmol m− 2 s− 1, respectively. Biomass concentration higher than 0.8 g L− 1 is also demonstrated to significantly enhance the light attenuation effect, which in turn inducing photolimitation phenomena. At a higher biomass concentration (3.5 g L− 1), cyanobacteria are unable to activate photosynthesis to maintain their lives in a photo-autotrophic growth culture, and biohydrogen production is significantly inhibited due to the severe light attenuation.
Issue Date: 3-Apr-2015
Date of Acceptance: 22-Mar-2015
URI: http://hdl.handle.net/10044/1/41945
DOI: http://dx.doi.org/10.1016/j.algal.2015.03.015
ISSN: 2211-9264
Publisher: Elsevier
Start Page: 263
End Page: 274
Journal / Book Title: Algal Research
Volume: 9
Copyright Statement: This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/F00270X/1
Keywords: Science & Technology
Life Sciences & Biomedicine
Biotechnology & Applied Microbiology
Biohydrogen production
Cyanobacteria
Dynamic simulation
Light intensity
Light attenuation
Temperature
HYDROGEN-PRODUCTION
CYANOTHECE SP
DIAZOTROPHIC CYANOBACTERIUM
ATCC 51142
CHLAMYDOMONAS-REINHARDTII
H-2 PRODUCTION
CULTURE
SYSTEMS
CULTIVATION
MICROALGAE
Publication Status: Published
Appears in Collections:Faculty of Engineering
Chemical Engineering



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