Mass transfer modeling and maximization of hydrogen rhythmic production from genetically modified microalgae biomass

A Review on Mathematical Modeling of Different Biological Methods of Hydrogen Production

“…The light energy absorbed by the photosystem (PS-I and PS-II) transports the electrons to ferredoxin (Fd) from water. This reduced ferredoxin transfers the electrons to the oxygen-sensitive enzyme, hydrogenase, which catalyzes the hydrogen production in the microbes [30,31]. Hydrogenase is both a receiver and donor; the electron that is received from the ferredoxin is donated to a proton converting it into hydrogen gas.…”

“…The first phase is a light-dependent-phase aerobic process, where the microbes synthesize carbohydrates from water and carbondioxide using light energy (Equation (3)). In aerobic conditions with the supply of air, the biomass progressively increases and is concentrated until it reaches a state of stabilization [26,31].…”

Experimental Calibration of a Biohydrogen Production Estimation Model

“…The details and equations associated to each term in Eq. (1) are omitted herein for the sake of brevity, but they are elaborated in [11,12].…”

“…As with the energy balance, the details and equations relevant to the terms listed in Eq. (3)- (5) as well as the conservation of species applied to H2, CO2, O2, N2, and nutrients are not presented herein, but they are described in [11,12].…”

“…Mathematical formulation of the model is summarized for consistency, but the main focus is given to experimental procedures and model calibration. Details of the model can be found in [11,12].…”