Optimum growth requirements of nitrifying consortia developed from treated sewage.
Indian J Exp Biol
;
2004 Mar; 42(3): 314-8
Article
in English
| IMSEAR
| ID: sea-62025
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 l(-1) NH4(+)- N and 2.5 g l(-1) NO2(-)-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 degrees and 30 degrees C for both the groups. As the rate of airflow was increased from 1 to 7 l/min, the build-up of NO2(-)-N increased 10-fold and the consumption of NO2(-)-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 expressing their full nitrifying potential. These data directly contribute for developing a fermentation process for the mass production of nitrifiers as well as for designing bioreactors for nitrifying sewage.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Oxygen
/
Sewage
/
Temperature
/
Waste Disposal, Fluid
/
Bioreactors
/
Ammonia
/
Quaternary Ammonium Compounds
/
Hydrogen-Ion Concentration
/
Nitric Oxide
/
Nitrites
Language:
English
Journal:
Indian J Exp Biol
Year:
2004
Type:
Article
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