Enhanced hexadecane degradation and low biomass production by Aspergillus niger exposed to an electric current in a model system.
Enhanced hexadecane degradation and low biomass production by Aspergillus niger exposed to an electric current in a model system.
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DOI：
10.1016/j.biortech.2010.07.111
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发表时间：
2011
影响因子：
11.4
通讯作者：
N. Velasco-Alvarez;I. González;P. Damián-Matsumura;M. Gutiérrez-Rojas
中科院分区：
文献类型：
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作者：
N. Velasco-Alvarez;I. González;P. Damián-Matsumura;M. Gutiérrez-Rojas
The effects of an electric current on growth and hexadecane (HXD) degradation by Aspergillus niger growth were determined. A 450-mL electrochemical cell with titanium ruthenium-oxide coated electrodes and packed with 15g of perlite (inert biomass support) was inoculated with A. niger (2.0×107spores (g of dry inert support)−1) and incubated for 12days (30°C; constant ventilation). 4.5days after starting culture a current of 0.42mAcm−2was applied for 24h. The current reduced (52±11%) growth of the culture as compared to that of a culture not exposed to current. However, HXD degradation was 96±1.4% after 8days whereas it was 81±1.2% after 12days in control cultures. Carbon balances of cultures not exposed to current suggested an assimilative metabolism, but a non-assimilative metabolism when the current was applied. This change can be related to an increase in total ATP content. The study contributes to the knowledge on the effects of current on the mycelial growth phase of A. niger, and suggests the possibility of manipulating the metabolism of this organism with electric current.
