To Summarize..
In conclusion we see that symbiotic bacteria under go different metabolic processes to produce our friend; biohydrogen. Biomass (food waste) is used in all four different methods. Direct and indirect both are aided by the photosystems that absorb water and light energy. Electrons get thrown into the enzyme hydrogenase that materializes H2. We also learned that photo and dark fermentation are both anaerobic processes (do not require oxygen to move the process along). Light energy then enters the bacterial photosystem in combination with biomass. All this then creates the two electrons needed to be sent off to nitrogenase to produce H2.
Make Way For The Future
Fun fact: the biohydrogen is the fuel that we all long for in the future because it burns clean (does not affect any part of the environment) it is cheaper and it requires little to no energy because the bacteria does most of the work. The one thing that poses a standstill for this process is efficiency. Biohydrogen takes the place of many fossil fuels that we use today that burns and destroys our environment.