Alcaligenes faecalis kw-a biofilm for denitrification of nitrate-rich effluent.

Abstract:

:Alcaligenes faecalis kw-A selected for possessing good denitrification efficiency was used for biofilm development. The biofilm could be developed on a glass surface within 12 hr when 5%, Ix 10(8) cells/ml was used as inoculum. The microcolonies were seen in 6 hr and glycocalyx in 9 hr stage. At 24 hr the biofilm was developed fully and hence was visualised as dense mass. The biofilm protein content showed 48.5% increase in shake flask than in static condition. The exopoplymer is produced in larger amounts in biofilm as compared to the suspended cells. Also, its amount was more by 43% in the biofilm produced in shake flask condition than in static condition. The biofilm could remove 95% nitrate from nitrate-rich effluent in a bench-scale process in 36 hr. The attached growth technique demonstrated here can be utilised to study the effect of favourable as well as adverse conditions on the denitrification efficiency of a culture. The ultimate application of a denitrifying biofilm would be in attached growth or biofilm reactor.

journal_name

Indian J Exp Biol

authors

Jadhav TS,Faldu NJ,Patel P,Narolkar SN,Nerurkar AS

keywords:

subject

Has Abstract

pub_date

2005-06-01 00:00:00

pages

542-7

issue

6

eissn

0019-5189

issn

0975-1009

journal_volume

43

pub_type

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