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nitrification
Low levels of NO3- in these forest soils generally correspond to low net rates of nitrification.
      
Nitrification and denitrification in subalpine coniferous forests of different restoration stages in western Sichuan, China
      
Nitrification is the biological conversion of organic or inorganic nitrogen compounds from a reduced to a more oxidized state.
      
The results showed that forest restoration stage had no significant effects on gross nitrification rates or denitrification rates (One-way ANOVA (analysis of variance), p >amp;lt; 0.05).
      
There was no significant difference in the temperature coefficient (Q10) for gross nitrification rate among all the forest sites (One-way ANOVA, p >amp;lt; 0.05).
      
Gross nitrification rates were positively correlated with water content (p >amp;lt; 0.05), but not with soil pH, organic matter, total nitrogen, or C/N ratios.
      
Results from this research suggest that gross nitrification is more responsible for the nitrogen loss from soils compared with denitrification.
      
In the nitrification, the average stoichiometric ratio between alkalinity consumption and ammonia oxidation is calculated to be 7.07 mg CaCO3/mg NH4+-N.
      
As a result, half of the alkalinity previously consumed during the aerobic nitrification was recovered during the subsequent anoxic denitrification period.
      
Characteristic points on the profiles of dissolved oxygen (DO), pH, and oxidation reduction potential (ORP) could exactly reflect the process of nitrification and denitrification.
      
Simultaneous nitrification and denitrification in activated sludge system under low oxygen concentration
      
Simultaneous nitrification and denitrification (SND), which is more economical compared with the traditional method for nitrogen removal, is studied in this paper.
      
The diversity of bacteria in aerobic granules was a premise of simultaneous nitrification and denitrification.
      
Factors affecting simultaneous nitrification and denitrification in an SBBR treating domestic wastewater
      
An aerobic sequencing batch biofilm reactor (SBBR) packed with Bauer rings was used to treat real domestic wastewater for simultaneous nitrification and denitrification.
      
The SBBR is advantageous for creating an anoxic condition, and the biofilm can absorb and store carbon for good nitrification and denitrification.
      
An average concentration of oxygen ranging from 0.8 to 4.0 mg/L was proved very efficient for nitrification and denitrification.
      
The efficiency of simultaneous nitrification and denitrification (SND) increased with increasing thickness of the biofilm.
      
Nitrification and denitrification in biological activated carbon filter for treating high ammonia source water
      
The key factor of restricting nitrification in BACF was the influent DO.
      
 

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