Hydrogen production from waste pastry hydrolysate was performed in the CSTR and CMISR.
The optimal hydrogen production rate of 277.76 mL/(h L) was obtained in the CSTR.
The maximum hydrogen production rate of CMISR was 320.2 mL/(h L)
One gram waste pastry could be converted to 91.66 mL hydrogen in the CSTR.
This is the first study which reports hydrogen production from waste pastry.