nitrification


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Related to nitrification: Nitrifying bacteria, nitrogen cycle

nitrification

 [ni″trĭ-fĭ-ka´shun]
the bacterial oxidation of ammonia and organic nitrogen to nitrites and nitrates in the soil.

ni·tri·fi·ca·tion

(nī'tri-fi-kā'shŭn),
1. Bacterial conversion of nitrogenous matter into nitrates.
2. Treatment of a material with nitric acid.

ni·tri·fi·ca·tion

(nī'tri-fi-kā'shŭn)
1. Bacterial conversion of nitrogenous matter into nitrates.
2. Treatment of a material with nitric acid.

nitrification

the conversion by soil BACTERIA of organic nitrogen into inorganic nitrates which plants can take up. Decay of animal and plant proteins gives rise to ammonium compounds which the bacteria Nitrosomonas and Nitrococcus oxidize to nitrite. Nitrobacter oxidizes nitrites to nitrates. See NITROGEN CYCLE.
References in periodicals archive ?
HMBR combines classical organic carbon depollution with simultaneous nitrification and denitrification.
In the present study, the practicability of the long-run treatment of wastewater containing high concentration ammonia nitrogen via the utilization of aerobic granular sludge is determined via granular sludge cultured through nitrification [14].
For example, a urine nitrification reactor is currently in operation in Nairobi/Kenya to treat urine collected by the organisation Sanergy.
Nitrification process decreased from 70% in first load to 45% in the second load by decreasing the HRT.
The stabilization reactor was a unique unit with different compartments that could be described as follows: i) SR: an aerated zone of suspended growth with a high presence of organic carbon; ii) SR an anoxic zone which favored denitrification; iii) SR an attached-suspended growth zone which favored nitrification and denitrification; and finally, iv) SR, an additional aerated zone of suspended growth with a high ammonia concentrations measured as total ammonia nitrogen (TAN) for favored nitrification.
Since the air-diffuser position resulted in the formation of aerobic or anoxic zone, the performance of nitrogen removal through SND might be compared to the separated reactions of nitrification and denitrification.
These compounds from root exudates of potentially allelopathic plant species inhibit the activity of AMO (ammonia mono- oxygenase) and HAO (hydroxylamine oxidoreductase), the two bacterial enzymes responsible for catalysis of nitrification reactions in soil (Subbarao et al., 2008).
Heterotrophic nitrification medium consisted of the following components: 0.382g/L NH4Cl 1.0g/L CH3CH2ONa 0.05g/L MgSO47H2O 0.2g/L K2HPO4 0.12g/L NaCl 0.01g/L MnSO4 and 0.01g/L FeSO4.
So by controlling high rates of soil nitrification process nitrogen use efficiency (NUE) can be improved.
Dissolved oxygen for nitrification is achieved through the use of high-volume blowers and an underwater aeration grid at the bottom of the cell.
Key words: nitrification inhibition, encapsulated calcium carbide, acetylene, ethylene, nitrate leaching, denitrificationWhy nitrification inhibition Amongst the nutrients, nitrogen (N) is most limiting to growth and yield parameters of a crop.
Soil and litter samples were analyzed for their capacities (i.e., potential rates) to express nitrification and denitrification (both processes being directly involved in the balance between N[H.sub.4.sup.+] and N[O.sub.3.sup.-]).