In the past several years a number of processes have been developed with the specific purpose of transforming nitrogen compounds for removing nitrogen from waste water.
The processes considered in this book are presented as follows; in part B, the biological removal methods, nitrification and denitrification; and in part C, the physical and chemical methods, Stripping, Break-point Chlorination, Ion Exchange, Membrane Processes and Precipitation.
In determining which method is most suitable for a particular application, the following aspects must be considered:
1) Form and concentration of the nitrogen compounds in the process influent.
2) The required effluent quality of the waste water.
3) Other treatment processes to be applied for the removal of other compounds.
4) The construction and running costs for the process.
5) The reliability of the process.
6) The flexibility of the process.
As an short introduction to parts B and C of this text, book, the following section will, present a brief description of the various nitrogen removal processes des cribed. The process characteristics, compound selectivity, and normal range of efficiency are presented.
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