Table 1.

Identification of partial 16S gene sequences from excised bands observed in denaturing gradient gel electrophoresis (DGGE) profiles.

Source	BlastN reference strains			RDP tassonomic classifier
	Closest relative strain	Similarity (%)	GenBank accession number	Most probabile taxon	Similarity (%)
Sludge	Paracoccus sp.	92	AY646160	Alphaproteobacteria	99
	Novosphingobium sp.	99	EU430056	Alphaproteobacteria	100
	Novosphingobium aromaticivorans	93	JF459981	Alphaproteobacteria	100
	Novosphingobium sp.	96	FM886872	Alphaproteobacteria	100
	Alpha proteobacterium	91	AB578881	Alphaproteobacteria	100
	Sphingomonas sp.	99	AJ617690	Alphaproteobacteria	100
	Sphingomonas sp.	89	GQ181132	Alphaproteobacteria	97
	Sphingobacteriaceae bacterium	97	FJ386545	Bacteroidetes	100
	uncultured Niastella sp.	98	GU326307	Bacteroidetes	100
	Flavobacteriales bacterium	95	EF636194	Bacteroidetes	100
	uncultured Oxalobacteraceae bacterium	91	HM141157	Betaproteobacteria	100
Fouled membranes	uncultured Xanthomonadalesbacterium	89	EF073609	Gammaproteobacteria	99
	uncultured Gammaproteobacteria bacterium	99	CU926678	Gammaproteobacteria	100
	Rhodanobacter sp.	99	EU876661	Gammaproteobacteria	100
	Rhodanobacter sp.	97	EU876661	Gammaproteobacteria	100
	uncultured Betaproteobacterium	97	JF703550	Betaproteobacteria	100
	uncultured Comamonas sp.	89	JF808874	Betaproteobacteria	99
	uncultured bacterium	98	AB241559	Bacteroidetes	100
	uncultured Acidobacteria bacterium	98	HM062044	Acidobacteria	100
	uncultured Betaproteobacterium	89	FJ184029	unclassified bacteria	98