Removal of Triphenylmethane Dyes by Bacterial Consortium

Table 1

Decolorization of dyes by individual pure culture of isolated bacterial strain and by a bacterial consortium.

Dyes	Time (h)	S1	S2	S3	S4	S5
CV	2	7±0.2	5±0.3	8±0.2	3±0.1	99±0.3
	4	39±0.4	25±0.3	44±0.3	31±0.5	99±0.2
	6	61±0.3	39±0.4	87±0.1	43±0.1	99±0.2
	8	77±0.2	45±0.5	92±0.2	50±0.2	99±0.1
	24	85±0.7	71±0.2	92±0.3	64±0.9	100±0.1
MG	2	0.6±0.3	0.1±0.4	0.8±0.4	0.4±0.2	91±0.3
	4	20±0.3	12±0.3	29±0.2	16±0.3	95±0.1
	6	63±0.2	37±0.2	68±0.3	40±0.4	97±0.3
	8	89±0.4	60±0.5	96±0.2	64±0.2	97±0.4
	24	94±0.3	97±0.1	93±0.4	94±0.1	99±0.1

Percentages of decolorization of crystal violet (CV) and malachite green (MG) were calculated after (2, 4, 6, 8, and 24 hours) culture at 35°C under agitation conditions, with yeast extract (0.1%) and glucose (7 mM) as an additional carbon source. Dyes were present at a concentration 50 mg/L. S₁, Agrobacterium radiobacter; S₂, Bacillus spp.; S₃, Sphingomonas paucimobilis; S₄, Aeromonas hydrophila; S₅, bacterial consortium (CM-4).