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The effect of nitrite correction on the evaluation of the rate of nitrate utilization under anoxic conditions

✍ Scribed by Seval Sözen; Derin Orhon

Publisher
Wiley (John Wiley & Sons)
Year
1999
Tongue
English
Weight
150 KB
Volume
74
Category
Article
ISSN
0268-2575

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✦ Synopsis

The nitrogen utilization requirement (NUR) test is a useful respirometric procedure for the assessment of major kinetic constants in activated sludge systems designed for nitrogen removal. The electron transfer mechanism of nitrogenous compounds often involves signi®cant nitrite accumulation which impairs the accuracy of the NUR test. Experimental results revealed no meaningful correlation between nitrite accumulation and the initial nitrate concentration or the food/microorganism (F/M) ratio. Signi®cant impact of nitrite accumulation was observed both on the assessment of the readily biodegradable COD component, the correction factor for anoxic growth and the denitri®cation rates applicable to domestic sewage and a number of industrial wastewaters.

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