TY - JOUR
T1 - The role of oxygen regulation and algal growth parameters in hydrogen production via biophotolysis
AU - Javed, Muhammad Asad
AU - Zafar, Abdul Mannan
AU - Aly Hassan, Ashraf
AU - Zaidi, Asad A.
AU - Farooq, Muhammad
AU - El Badawy, Amro
AU - Lundquist, Tryg
AU - Mohamed, Mohamad Mostafa Ahmed
AU - Al-Zuhair, Sulaiman
N1 - Funding Information:
This work was supported by the National Water and Energy Center at United Arab Emirates University (UAEU) [grant number G00003296 ].
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/2
Y1 - 2022/2
N2 - One of the biggest challenges for hydrogen (H2) production via biophotolysis is the sensitivity of the process to oxygen (O2), which is the primary inhibitor of the hydrogenase enzyme responsible for H2 production. The present study reviews the literature on methods to enhance H2 production by creating suitable conditions to enable the activity of the hydrogenase enzyme. Techniques studied include the regulation of available O2 and utilizations of antioxidants. Furthermore, optimizing algal growth parameters such as pH, temperature, light intensity, and cell density can keep the algal cells alive for a more extended period for biophotolysis and can directly or indirectly activate enzymatic activity for enhanced H2 production. Various O2 regulating techniques, i.e., mineral deprivation, oxygen-reducing agents/scavengers, co-culturing of microalgae with bacteria, the addition of antioxidants and nanoparticles have been analyzed and discussed in this review. Analysis of strengths, weaknesses, opportunities, and threats/challenges (SWOT) also presents the limitations and advantages of H2 production via biophotolysis. This review insights that employing all the favorable techniques with suitable operating parameters simultaneously can result in enhanced H2 yield and better process sustainability. However, O2 regulating techniques such as co-culturing with bacteria and the use of antioxidants/nanoparticles appear to be the most significant in H2 production via biophotolysis towards environmental sustainability and green energy.
AB - One of the biggest challenges for hydrogen (H2) production via biophotolysis is the sensitivity of the process to oxygen (O2), which is the primary inhibitor of the hydrogenase enzyme responsible for H2 production. The present study reviews the literature on methods to enhance H2 production by creating suitable conditions to enable the activity of the hydrogenase enzyme. Techniques studied include the regulation of available O2 and utilizations of antioxidants. Furthermore, optimizing algal growth parameters such as pH, temperature, light intensity, and cell density can keep the algal cells alive for a more extended period for biophotolysis and can directly or indirectly activate enzymatic activity for enhanced H2 production. Various O2 regulating techniques, i.e., mineral deprivation, oxygen-reducing agents/scavengers, co-culturing of microalgae with bacteria, the addition of antioxidants and nanoparticles have been analyzed and discussed in this review. Analysis of strengths, weaknesses, opportunities, and threats/challenges (SWOT) also presents the limitations and advantages of H2 production via biophotolysis. This review insights that employing all the favorable techniques with suitable operating parameters simultaneously can result in enhanced H2 yield and better process sustainability. However, O2 regulating techniques such as co-culturing with bacteria and the use of antioxidants/nanoparticles appear to be the most significant in H2 production via biophotolysis towards environmental sustainability and green energy.
KW - Bioenergy
KW - Biofuel
KW - Biophotolysis
KW - Hydrogen production
KW - Microalgae
KW - Oxygen regulation
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U2 - 10.1016/j.jece.2021.107003
DO - 10.1016/j.jece.2021.107003
M3 - Review article
AN - SCOPUS:85121548362
SN - 2213-3437
VL - 10
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
IS - 1
M1 - 107003
ER -