Search results
Results from the WOW.Com Content Network
Nitrifying bacteria are chemolithotrophic organisms that include species of genera such as Nitrosomonas, Nitrosococcus, Nitrobacter, Nitrospina, Nitrospira and Nitrococcus. These bacteria get their energy from the oxidation of inorganic nitrogen compounds. [1] Types include ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB).
Nitrogen cycle. Nitrification is the biological oxidation of ammonia to nitrate via the intermediary nitrite.Nitrification is an important step in the nitrogen cycle in soil.The process of complete nitrification may occur through separate organisms [1] or entirely within one organism, as in comammox bacteria.
The conversion of nitrite to nitrate is facilitated by nitrite-oxidizing bacteria. The genus Nitrobacter is widely distributed in both aquatic and terrestrial environments. [ 2 ] Nitrifying bacteria have an optimum growth between 77 and 86 °F (25 and 30 °C), and cannot survive past the upper limit of 120 °F (49 °C) or the lower limit of 32 ...
Nitrobacter winogradskyi is a gram-negative nitrite-oxidizing bacteria from the genus of Nitrobacter. [2] [3] It is a chemolithoautotroph that derives energy by oxidation of nitrite. Nitrobacter winogradskyi is rod-shaped and is involved in the biological nitrification process that occurs within the nitrogen cycle.
Nitrospira is a ubiquitous bacterium that plays a role in the nitrogen cycle [8] by performing nitrite oxidation in the second step of nitrification. [7] Nitrospira live in a wide array of environments including but not limited to, drinking water systems, waste treatment plants, rice paddies , forest soils , geothermal springs, and sponge ...
Aerobic denitrification, or co-respiration, the simultaneous use of both oxygen (O 2) and nitrate (NO − 3) as oxidizing agents, performed by various genera of microorganisms. [1] This process differs from anaerobic denitrification not only in its insensitivity to the presence of oxygen, but also in its higher potential to form nitrous oxide ...
Nitrosomonas is a genus of Gram-negative bacteria, belonging to the Betaproteobacteria.It is one of the five genera of ammonia-oxidizing bacteria [8] and, as an obligate chemolithoautotroph, [9] uses ammonia as an energy source and carbon dioxide as a carbon source in the presence of oxygen.
Nitrite oxidoreductase (NOR or NXR) is an enzyme involved in nitrification.It is the last step in the process of aerobic ammonia oxidation, which is carried out by two groups of nitrifying bacteria: ammonia oxidizers such as Nitrosospira, Nitrosomonas, and Nitrosococcus convert ammonia to nitrite, while nitrite oxidizers such as Nitrobacter and Nitrospira oxidize nitrite to nitrate.