Abstract：
:Fungal biofilters have been recently studied as an alternative to the bacterial systems for the elimination of hydrophobic volatile organic compounds (VOC). Fungi foster reduced transport limitation of hydrophobic VOCs due to their hydrophobic surface and extended gas exchange area associated to the hyphal growth. Nevertheless, one of their principal drawbacks is their slow growth, which is critical in the start-up of fungal biofilters. This work compares the use of different carbon sources (glycerol, 1-hexanol, wheat bran, and n-hexane) to reduce the start-up period and sustain high n-hexane elimination capacities (EC) in biofilters inoculated with Fusarium solani. Four parallel experiments were performed with the different media and the EC, the n-hexane partition coefficient, the biomass production and the specific consumption rate were evaluated. Biofilters were operated with a residence time of 1.3 min and an inlet n-hexane load of 325 g m(-3) (reactor) h(-1). The time to attain maximum EC once gaseous n-hexane was fed was reduced in the three experiments with alternate substrates, as compared to the 36 days needed with the control where only n-hexane was added. The shortest adaptation period was 7 days when wheat bran was initially used obtaining a maximum EC of 160 g m(-3) (reactor) h(-1) and a critical load of 55 g m(-3) (reactor) h(-1). The results were also consistent with the pressure drop, the amount of biomass produced and its affinity for the gaseous n-hexane, as represented by its partition coefficient.
journal_name
Biotechnol Bioengjournal_title
Biotechnology and bioengineeringauthors
Vergara-Fernández A,Hernández S,Revah Sdoi
10.1002/bit.23003subject
Has Abstractpub_date
2011-04-01 00:00:00pages
758-65issue
4eissn
0006-3592issn
1097-0290journal_volume
108pub_type
杂志文章abstract：:Pronounced spatial nonuniformities in cell density, physiology, and activity frequently arise within densely packed immobilized cell supports. For a more fundamental understanding of immobilized cell phenomena, we have developed high-resolution microfluorimetric procedures to analyze local variations in both immobiliz...
journal_title：Biotechnology and bioengineering
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doi：10.1002/bit.260290612
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journal_title：Biotechnology and bioengineering
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journal_title：Biotechnology and bioengineering
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journal_title：Biotechnology and bioengineering
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journal_title：Biotechnology and bioengineering
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