Metabolic Processes
Metabolic processes are the processes undergone by cells that are necessary for life. There are two types of metabolic processes:
-Catabolic: processes break apart molecules to release energy
-Anabolic: an anabolic processes build molecules and fuse energy within them
Fermentation is the first stage of cellular respiration, glycolysis, plus reduction of the electron carrier NAD+. Fermentation is a metabolic process that yields energy, it takes place in the absence of oxygen. It requires a substrate (usually a sugar). On a molecular level, fermentation is like glycolysis except that the H atoms from NADH get transferred to other molecules, (not to electron transport chain) in order to recycle NAD+. Very little energy is extracted from food when it is broken down through fermentation, only two ATP , therefore, energy remains in the waste products.
-Catabolic: processes break apart molecules to release energy
-Anabolic: an anabolic processes build molecules and fuse energy within them
Fermentation is the first stage of cellular respiration, glycolysis, plus reduction of the electron carrier NAD+. Fermentation is a metabolic process that yields energy, it takes place in the absence of oxygen. It requires a substrate (usually a sugar). On a molecular level, fermentation is like glycolysis except that the H atoms from NADH get transferred to other molecules, (not to electron transport chain) in order to recycle NAD+. Very little energy is extracted from food when it is broken down through fermentation, only two ATP , therefore, energy remains in the waste products.
Photo Fermentation
Photo-fermentation is one way biohydrogen can be produced. This takes place with photosynthetic bacteria via the enzyme nitrogenase. This process uses light energy and bio mass (food waste). Light energy and the biomass go into a bacterial photosystem which produces two electrons and four ATP molecules. Then these products are then sent to the nitrogenase that are used to produce H2.
Dark Fermentation
Dark Fermentation begins with a biomass (food waste) acting as a substrate. This food waste undergoes fermentation but lacking light energy. Unlike photo fermentation the products are H2 and CO2. The pH and partial pressure determines how effective dark fermentation is. It is proven that dark fermentation is the most space and time effective.