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Biodegradation of petroleum hydrocarbons by Neosartorya sp. BL4
A new petroleum hydrocarbon-degrading fungus, isolated from an oil contaminant soil, was identified as Neosartorya (teleomorph of Aspergillus) sp. This isolate was able to degrade total petroleum hydrocarbons (TPHs) without a lag phase, but degradation rates decreased with increasing initial TPH concentrations (5,000–20,000 mg L−1). The TPH degradation by the isolate showed a substrate inhibition behavior with an inhibition constant (Ki) of 1,860 mg L−1. Dual lag phase of TPH degradation indicated the ability to adapt its metabolic activity to utilize different types of hydrocarbons as an electron donor. Initially n-alkanes were rapidly removed without lag phase in the whole range of substrate and heavy molecular weight alkanes (HMWAs; C23-C24) and low molecular weight alkanes (LMWAs C9-C15) out of n-alkane hydrocarbons were degraded rapidly, whereas the removal of mid molecular weight alkanes (MMWAs; C16-C22) was relatively slower. Relatively slow degradation of MMWAs is probably caused by biotransformation of HMWAs or non-alkane hydrocarbons to MMWAs.
Biodegradation of petroleum hydrocarbons by Neosartorya sp. BL4
A new petroleum hydrocarbon-degrading fungus, isolated from an oil contaminant soil, was identified as Neosartorya (teleomorph of Aspergillus) sp. This isolate was able to degrade total petroleum hydrocarbons (TPHs) without a lag phase, but degradation rates decreased with increasing initial TPH concentrations (5,000–20,000 mg L−1). The TPH degradation by the isolate showed a substrate inhibition behavior with an inhibition constant (Ki) of 1,860 mg L−1. Dual lag phase of TPH degradation indicated the ability to adapt its metabolic activity to utilize different types of hydrocarbons as an electron donor. Initially n-alkanes were rapidly removed without lag phase in the whole range of substrate and heavy molecular weight alkanes (HMWAs; C23-C24) and low molecular weight alkanes (LMWAs C9-C15) out of n-alkane hydrocarbons were degraded rapidly, whereas the removal of mid molecular weight alkanes (MMWAs; C16-C22) was relatively slower. Relatively slow degradation of MMWAs is probably caused by biotransformation of HMWAs or non-alkane hydrocarbons to MMWAs.
Biodegradation of petroleum hydrocarbons by Neosartorya sp. BL4
Yi, Taewoo (Autor:in) / Lee, Eun-Hee (Autor:in) / Park, Hyerim (Autor:in) / Cho, Kyung-Suk (Autor:in)
Journal of Environmental Science and Health, Part A ; 46 ; 1763-1768
01.12.2011
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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