Characterization of a filamentous biofilm community established in a cellulose-fed microbial fuel cell

BMC Microbiology

Table 1 Metabolite-production rates in the cellulose-fed MFC^a

Enrichment phase	Day^b	Metabolite-production rate (mmol l^-1 d^-1)
		Electron	Methane	Acetate	Propionate	Butyrate	Hydrogen
I	0 to 32	0.59	0.10	0.51	0.25	0.05	0.00
I	35 to 45	0.64	3.66	-3.60^c	0.02	0.03	0.00
II	46 to 82	0.54	0.15	0.32	0.02	0.00	0.00
II^d	87 to 96	1.55	0.11	-0.31^c	0.00	0.00	0.00
III	97 to 136	0.65	0.06	0.08	0.00	0.00	0.00
IV	140 to 210	0.65	0.08	0.09	0.01	0.00	0.00
V	220 to 273	0.69	0.09	0.12	0.01	0.00	0.00

^a Short-chain alcohols (ethanol, propanol and butanol) were not detected throughout the experiment.
^b Data obtained in these days were used for calculation.
^c Acetate was consumed.
^d Ferricyanide was added to the cathode chamber.

ISSN: 1471-2180