Electron acceptor versus depth Question Flashcards
Vertical sequence of electron acceptors in sediment
Aerobic respiration Nitrate reduction Manganese reduction Iron Reduction Sulphate reduction Methanogenesis
Where are SRBs present?
Present in all areas excluding depth where methanogenesis is dominant (Wilms, 2006)
What do aerobic microorganisms oxidise, and what is the resultant compound?
Oxidise substrate to CO2
What do aerobic microorganisms use as an electron acceptor?
Molecular oxygen-High energy yield-30-50% of substrate assimilated to biomass.
Give a definition for anaerobic activity
The use of other electron acceptors instead of oxygen
Give examples of commonly used electron acceptors in anaerobic activity
Nitrogen, Manganese, Iron, Sulphate, Methane
Aerobic respiration
C6H12O6+6O2——–>6CO2+24e-+24H+
Sulphate Reduction
C6H12O6+3SO2-4+6H+—>6CO2+3H2S+6H2O