Bright Singh, I S; Kavitha, Ramachandran(December 3, 2003)
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Abstract:
The optimum growth requirements of two nitrifying consortia developed from treated sewage by enrichment technique
were determined by a series of experiments. There was total inhibition of nitrification at above 2.75 g r' NH/- Nand 2.5g r'
N02' - N and the ammonia oxidizing consortium preferred a pH at 8.5 and the nitrite oxidizing consortium a pH of 7.5 as the
optima for nitrification. Optimum temperatures were between 20° and 30°C for both the groups. As the rate of airnow was
increased from I to 7 Ilmin, the build-up of N02- -N increased 10-fold and the consumption of N02- -N increased by a factor
of 28.8 implying that the ammonia oxidizing consortium in a bioreactor required three times more aeration than that for
nitrite oxidizers for ex pressing their full nitrifying potential. These data directly contribute for developing a fermentati on
process for the mass production of nitrifiers as well as for designing bio reactors for nitrifying sewage.
Description:
Indian lournal of Experimental Biology
Vol. 42, March 2004, pp. 314-318