Denitrification environmental controls

Cornwell, J.C., Kemp, W.M., and Kana, T.M. (1999) Denitrification in coastal ecosystems methods, environmental controls and ecosystem level controls, a review. Aquat. Ecol. 33, 41-54. 

Figure 12), the substrate and environmental controls on anaerobic NH4 oxidation are likely to be quite different from those for the classical sequence of reactions. The contribution of these processes to overall denitrification is largely unknown, but the limited evidence suggests they may be quantitatively important in both natural ecosystems and wastewater treatment processes. 

Levels of [N03] in waste water are controlled by legislation, limits being recommended by the World Health Organization, the Environmental Protection Agency (in the US) and the European Community. Nitrites, because of their toxicity, must also be removed. Methods of nitrate removal include anion exchange, reverse osmosis (see Box 15.3), and denitrification. The last process is a biological one in which certain anaerobic bacteria reduce [N03] and [N02] to N2 ... 

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