What is Aerobic and Anaerobic reaction. Differences between Aerobic and Anaerobic reaction. These two reactions are different from each other. Aerobic Reaction Aerobic decomposition caused by both aerobic and facultative bacteria operating aerobically in presence of air or Oxygen which is available in wastewater in dissolved form is called Aerobic reactions. during this process, organic matter is broken up into non-objectionable and products like CO2, H2O, SO4, NO2, etc. This is the combination of work of aerobic bacteria and Oxygen. Example of aerobic reaction in Sewage treatment is oxidation pond trickling filter. Anaerobic Reaction It is caused by anaerobic bacteria as well as facultative bacteria operating anaerobically in the absence of air or Oxygen. The end products of anaerobic decomposition include black residue CH4, NH3, N2, etc. The anaerobic reaction in sewage treatment is taken in the septic tank, sludge, digestion tank. The end product of an anaerobic is like...