nitrification

Examples of nitrification in the following topics:

• Nitrification

  • Nitrification is an important step in the nitrogen cycle in soil.
  • Nitrification is an aerobic process performed by small groups of autotrophic bacteria and archaea.
  • The transformation of ammonia to nitrite is usually the rate limiting step of nitrification.
  • Nitrification also plays an important role in the removal of nitrogen from municipal wastewater.
  • The conventional removal is nitrification, followed by denitrification.

• The Nitrogen Cycle

  • Nitrificaton: Nitrification is the conversion of ammonia (NH3) to nitrate (NO3-).
  • Nitrification is performed mainly by the genus of bacteria, Nitrobacter.
  • Nitrification can also work on ammonium.
  • It can either be cycled back into a plant usable form through nitrification or returned to the atmosphere through de-nitrification.
  • De-Nitrification: Nitrogen in its nitrate form (NO3-) is converted back into atmospheric nitrogen gas (N2) by bacterial species such as Pseudomonas and Clostridium, usually in anaerobic conditions.

• Psychrophilic Crenarchaeota

  • Nitrification , as stated above, is formally a two-step process; in the first step ammonia is oxidized to nitrite, and in the second step nitrite is oxidized to nitrate.
  • Crenarchaeote are abundant in the ocean and some species have a 200 times greater affinity for ammonia than AOB, leading researchers to challenge the previous belief that AOB are primarily responsible for nitrification in the ocean.
  • Nitrification is the biological oxidation of ammonia with oxygen into nitrite followed by the oxidation of these nitrites into nitrates.
  • Degradation of ammonia to nitrite is usually the rate limiting step of nitrification.
  • Nitrification is an important step in the nitrogen cycle in soil.

• The Nitrogen Cycle

  • This process occurs in three steps in terrestrial systems: ammonification, nitrification, and denitrification.
  • Second, the ammonium is converted to nitrites (NO2−) by nitrifying bacteria, such as Nitrosomonas, through nitrification.
  • A similar process occurs in the marine nitrogen cycle, where the ammonification, nitrification, and denitrification processes are performed by marine bacteria.

• Nitrospirae and Deferribacter

  • By a process known as nitrification, bacteria convert these waste products to less toxic forms.

• The Role of Prokaryotes in Ecosystems

  • Nitrification is the conversion of ammonium to nitrite and nitrate.
  • Nitrification in soils is carried out by bacteria belonging to the genera Nitrosomas, Nitrobacter, and Nitrospira.

• Habitats and Energy Metabolism of Crenarchaeota

  • Some marine Crenarchaeota are capable of nitrification, suggesting these organisms may affect the oceanic nitrogen cycle, although these oceanic Crenarchaeota may also use other sources of energy.