SMP: Soluble Metabolite Product; VFA: Volatile Fatty Acid; Hmax: Maximum Hydrogen Production; Rmax: Hydrogen production rate; HPB: Hydrogen Producing Bacteria; SEM: Scanning Electron Microscope.
A set of values of key parameters to obtain the maximum hydrogen production is given.
The optimum operating conditions for obtaining maximum hydrogen production are also investigated.
The maximum hydrogen production was achieved with 5.0 mol L−1 NaOH and 3.4 V electric voltage.
The T-450 load 0.5 wt% Pt cocatalysts showed the best photocatalytic hydrogen production activity, with a maximum hydrogen production rate of 7808 μmol g−1 h−1.
The maximum hydrogen production (day 3) was 0.53 L/L-d, reaching an energy efficiency relative to electrical energy input of ηE = 144%.
In addition, compared to the batch culture, a much higher maximum hydrogen production rate (102.33 ml H2/l h) was achieved during fed-batch culture.
Some operational and design parameters of the cycle sections can be optimized in order to obtain the maximum hydrogen production and higher efficiency.
Maximum hydrogen production rate of 2191 mL/L/d was estimated at the temperature of 37.3 °C, initial pH of 8.0 and glycerol concentration of 15.2 g/L.
Experimental results show that pH, temperature and substrate concentration all had a significant influence on specific hydrogen production potential (Ps) and the maximum hydrogen production rate (Rmax) individually.
Box Behnken design and response surface analysis were adopted to further investigate the mutual interaction between the variables and identify optimal values that bring maximum hydrogen production.
