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Evaluation of the effect of aerobic-anaerobic conditions on photohydrogen and chlorophyll a production by environmental Egyptian cyanobacterial and green algal species

Lookup NU author(s): Professor Phillip Wright


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© 2017 Hydrogen Energy Publications LLC. In this study, we tested four algal species (Synechocystis sp. PCC 6803 and three novel algal species isolated from Egyptian paddy rice soil, having high 16S rRNA gene sequence identity to Nostoc spongiaeforme, Parachlorella kessleri SAG 211-11 and Nostoc sp. PCC 7524) under aerobic, anaerobic and 3% CO2-supplemented anaerobic condition. Significant changes in photohydrogen production, morphology, chlorophyll a and protein content/pattern were observed in all species, when grown in these different conditions. H2 production was higher in anaerobic condition in all species with the highest H2 production rate of 4 mmol H2 mg Chla -1 h-1 at 24 h in Synechocystis sp. In contrast, Chla content and protein content decreased (%) in N. spongiaeforme, (29%, 58%), P. kessleri (47%, 7%) and Nostoc sp. (59%, 65%).The anaerobic condition with 3% CO2 stimulated early production of H2 in all species except Synechocystis sp. Our results compared all selected algal species under different growth conditions for the screening of a superior H2-producing algal species that can help to address engineering challenges in the field of large-scale H2 photoproduction by microalgae.

Publication metadata

Author(s): Hamed SM, Raut MP, Jaffe SRP, Wright PC

Publication type: Article

Publication status: Published

Journal: International Journal of Hydrogen Energy

Year: 2017

Volume: 42

Issue: 10

Pages: 6567-6577

Print publication date: 09/03/2017

Online publication date: 01/02/2017

Acceptance date: 12/01/2017

Date deposited: 07/06/2017

ISSN (print): 0360-3199

Publisher: Elsevier Ltd


DOI: 10.1016/j.ijhydene.2017.01.058


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