Abstract:
:Ethanol-producing bioreactors employing cells of Zymomonas mobilis attached to glass-fiber pads were operated continuously for as long as 28 days. Ethanol production, which is related to bed-associated biomass levels, was found to occur in three distinct phases: an exponential phase, a linear phase, and a "steady-state" phase. After prolonged operation, a bacterial floc developed in the reactor. The maximum effluent ethanol concentration and the maximum volumetric productivity were 6.4% and 152 g L(-1) h(-1), respectively, and both were attained at a liquid residence time of from 10-15 min. Both maxima occurred after the development of the bacterial floc. The flocculant bacterium has been isolated and tentatively identified as a flocculant strain of Z. mobilis.
journal_name
Biotechnol Bioengjournal_title
Biotechnology and bioengineeringauthors
Arcuri EJdoi
10.1002/bit.260240306subject
Has Abstractpub_date
1982-03-01 00:00:00pages
595-604issue
3eissn
0006-3592issn
1097-0290journal_volume
24pub_type
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