Biodegradation Of Diesel By A Locally Isolated Acinetobacter Sp.

Local bacteria isolated from oil-contaminated soils from various locations in Malaysia were screened for their ability to degrade commercial diesel fuel. Enrichment culture from soil samples yielded several isolates capable of degrading diesel. Of these, Isolate 1 was selected for further studies ba...

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Main Author:	Dahalan, Farrah Aini
Format:	Thesis
Language:	English English
Published:	2007
Subjects:	Diesel fuels - Biodegradation Acinetobacter - Biodegradation
Online Access:	http://psasir.upm.edu.my/id/eprint/4865/1/FBSB_2007_5.pdf
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id	my-upm-ir.4865
record_format	uketd_dc
spelling	my-upm-ir.48652013-05-27T07:18:46Z Biodegradation Of Diesel By A Locally Isolated Acinetobacter Sp. 2007 Dahalan, Farrah Aini Local bacteria isolated from oil-contaminated soils from various locations in Malaysia were screened for their ability to degrade commercial diesel fuel. Enrichment culture from soil samples yielded several isolates capable of degrading diesel. Of these, Isolate 1 was selected for further studies based on its best growth performance compared to the other isolates. Biodegradation studies were conducted using head-space solid-phase microextraction (HS-SPME: 110°C, 10 min, 7 μm PDMS fiber and 25% NaCl) coupled to gas chromatography equipped with flame ionization detector (GC-FID). The isolate was identified as Acinetobacter sp. (1470 bp) (98% sequence homology) using 16s rRNA molecular phylogenetic analysis. Isolate 1 exhibited optimum growth at 37°C in media containing 4% (v/v) diesel, and is able to degrade 51.7% of diesel in 6 days. Isolate 1 was grown on various nitrogen sources such as NH4Cl, NH4SO4, NaNO3, and KNO3. The best nitrogen source is potassium nitrate (KNO3) at 0.9% (v/v). Its optimized optimum pH for growth is pH 7.5. Five different diesel-degrading enzymes were detected: alkane-oxidizing enzyme (0.2.8 μmol min-1 ml-1), alcohol dehydrogenase (9.0956 μmol min-1 ml-1), aldehyde dehydrogenase (4.234 μmol min-1 ml-1), pyridine nucleotide-independent dehydrogenase (4.229 μmol min-1 ml-1) and aldehyde reductase (8.126 μmol min-1 ml-1) Diesel fuels - Biodegradation Acinetobacter - Biodegradation 2007 Thesis http://psasir.upm.edu.my/id/eprint/4865/ http://psasir.upm.edu.my/id/eprint/4865/1/FBSB_2007_5.pdf application/pdf en public masters Universiti Putra Malaysia Diesel fuels - Biodegradation Acinetobacter - Biodegradation Faculty of Biotechnology and Biomolecular sciences English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Diesel fuels - Biodegradation Acinetobacter - Biodegradation
spellingShingle	Diesel fuels - Biodegradation Acinetobacter - Biodegradation Dahalan, Farrah Aini Biodegradation Of Diesel By A Locally Isolated Acinetobacter Sp.
description	Local bacteria isolated from oil-contaminated soils from various locations in Malaysia were screened for their ability to degrade commercial diesel fuel. Enrichment culture from soil samples yielded several isolates capable of degrading diesel. Of these, Isolate 1 was selected for further studies based on its best growth performance compared to the other isolates. Biodegradation studies were conducted using head-space solid-phase microextraction (HS-SPME: 110°C, 10 min, 7 μm PDMS fiber and 25% NaCl) coupled to gas chromatography equipped with flame ionization detector (GC-FID). The isolate was identified as Acinetobacter sp. (1470 bp) (98% sequence homology) using 16s rRNA molecular phylogenetic analysis. Isolate 1 exhibited optimum growth at 37°C in media containing 4% (v/v) diesel, and is able to degrade 51.7% of diesel in 6 days. Isolate 1 was grown on various nitrogen sources such as NH4Cl, NH4SO4, NaNO3, and KNO3. The best nitrogen source is potassium nitrate (KNO3) at 0.9% (v/v). Its optimized optimum pH for growth is pH 7.5. Five different diesel-degrading enzymes were detected: alkane-oxidizing enzyme (0.2.8 μmol min-1 ml-1), alcohol dehydrogenase (9.0956 μmol min-1 ml-1), aldehyde dehydrogenase (4.234 μmol min-1 ml-1), pyridine nucleotide-independent dehydrogenase (4.229 μmol min-1 ml-1) and aldehyde reductase (8.126 μmol min-1 ml-1)
format	Thesis
qualification_level	Master's degree
author	Dahalan, Farrah Aini
author_facet	Dahalan, Farrah Aini
author_sort	Dahalan, Farrah Aini
title	Biodegradation Of Diesel By A Locally Isolated Acinetobacter Sp.
title_short	Biodegradation Of Diesel By A Locally Isolated Acinetobacter Sp.
title_full	Biodegradation Of Diesel By A Locally Isolated Acinetobacter Sp.
title_fullStr	Biodegradation Of Diesel By A Locally Isolated Acinetobacter Sp.
title_full_unstemmed	Biodegradation Of Diesel By A Locally Isolated Acinetobacter Sp.
title_sort	biodegradation of diesel by a locally isolated acinetobacter sp.
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Biotechnology and Biomolecular sciences
publishDate	2007
url	http://psasir.upm.edu.my/id/eprint/4865/1/FBSB_2007_5.pdf
_version_	1747810299606466560

Biodegradation Of Diesel By A Locally Isolated Acinetobacter Sp.

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