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Biodegradation of tetradecane using Acinetobacter venetianus immobilized on bagasse

Paper ID Volume ID Publish Year Pages File Format Full-Text
2897 141 2015 7 PDF Available
Title
Biodegradation of tetradecane using Acinetobacter venetianus immobilized on bagasse
Abstract

•Bagasse was used as a carrier to immobilize cells for n-alkane degradation.•In contrast to free cells, immobilized cells increased tetradecane degradation.•Bagasse was able to protect the cells from pollution stress.

Immobilized cells present advantages for degrading organic pollutants compared to free suspended cells. However, the immobilization of cells with reference to agricultural waste is still limited. This study investigated using bagasse as a carrier to immobilize Acinetobacter venetianus (A. venetianus) for the degradation of n-alkane. The degradation of alkane based on both adsorption and biodegradation by immobilized A. venetianus was observed, where 93.3%, 77.7% and 24.0% of tetradecane (400 mg L−1) were removed by the immobilized cells, free cells and bagasse after 36 h incubation, respectively. Additionally, alkane (C10–C25) in diesel was effectively degraded by the immobilized cells, of which 800 mg L−1 of alkane was completely degraded after 60 h. Furthermore, results showed: (1) tetradecane served as the optimal carbon source at the concentration of 100 mg L−1; and (2) cells immobilization reached its peak efficiency with the cells-to-bagasse ratio of 0.5 mgcell g−1bagasse. Cells strongly immobilized on bagasse retained a high degradation rate of 77.6% after shaking at 1500 rpm. Bagasse protected the cells from pollution stress including cadmium (Cd(II)) and phenanthrene. After 8 reuse cycles, immobilized cells became more stable and efficient. Bagasse-A. venetianus has potential for future application in remediating diesel contaminants.

Keywords
Biodegradation; Bioremediation; Immobilized cells; Waste-water treatment; A. venetianus; n-Alkane
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Biodegradation of tetradecane using Acinetobacter venetianus immobilized on bagasse
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 100, 15 August 2015, Pages 76–82
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us