International Journal of Advanced Research in Engineering and Technology (IJARET)

Source ID:00000006
Volume 7, Issue 1,January-February 2016, Pages 80-88, Page Count - 9

LABORATORY STUDIES ON THE BIOREMEDIATION OF SOIL CONTAMINATED BY DIESEL

B. Santhaveerana Goud (1) Fareeda Banu N (2) Prathibha D (3)

(1) Professor and Former Chairman, Department of Civil Engineering, University Visvesvaraya College of Engineering (UVCE), Bengaluru, Karnataka, India.
(2) Post Graduate Student, Department of Civil Engineering, University Visvesvaraya College of Engineering (UVCE), Bengaluru, Karnataka, India.
(3) Research Scholar, Department of Civil Engineering, University Visvesvaraya College of Engineering (UVCE), Bengaluru, Karnataka, India.

Manuscript ID:- 00000-51336
Access Type : Open Access
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Cite this article:B. Santhaveerana Goud,Fareeda Banu N,Prathibha D,  Laboratory Studies On The Bioremediation Of Soil Contaminated By Diesel, International Journal of Advanced Research in Engineering and Technology(IJARET), 2016, 7(1), PP.80-88

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Abstract

The most widely used energy and fuel resources are hydrocarbons such as crude oil and petroleum distillates. The accidental discharge of these petroleum products contribute in making hydrocarbons the most common environmental pollutants. Bioremediation helps to destroy or render harmless various contaminants using natural biological activity. The present study utilizes the potential of bioremediation to remediate soil contaminated with diesel. Eight bioreactors were used for the study, out of which four bioreactors were maintained at optimum environmental conditions and the remaining four were kept without any maintenance to serve as control bioreactors. Contaminated soil was prepared by mixing fresh soil and diesel so as to attain 10% TPH concentrations by weight of soil. Each bioreactor was filled with 3 kg of contaminated soil.

   About 68.05% of TPH removal was observed in bioreactors used as control and 85.76% of TPH removal was observed in the bioreactors with optimum environmental conditions. Higher TPH degradation was witnessed in the bioreactors maintained at optimum environmental conditions compared to the control setup. The difference in hydrocarbon biodegradation was due to the higher bacterial population observed in bioreactors maintained at optimum environmental conditions. The microbial count in the bioreactors maintained at optimum environmental conditions varied from 32×106CFU/gm to 87×106CFU/gm in the sixth week and then decreased to 48×106CFU/gm of soil at the end of 12th week. Whereas, in the control bioreactors the microbial count varied from 24×106 CFU/gm to 71×106 CFU/gm till fifth week and then decreased to 32×106 CFU/gm of soil at the end of 12th week. This indicated that biological activity was greatly influenced by the environmental conditions, which in turn affects the degradation of hydrocarbons. The degradation rate observed in bioreactors used as control was 0.0136 d -1 and 0.0232 d -1 in the bioreactors maintained at optimum environmental conditions.


Author Keywords
Biodegradation Bioreactors Diesel Environmental Conditions Hydrocarbons.
Index Keywords
Petroleum Distillates Environmental Pollutants Primarily Microorganisms

ISSN Print: 0976-6480 ISSN Online: 0976-6499
Source Type: Journals Document Type: Journal Article
Publication Language: English DOI:
Abbreviated Journal Title: IJARET Access Type: Open Access
Publisher Name: IAEME Publication Resource Licence: CC BY-NC
Major Subject:Physical Sciences Subject Area classification: Engineering and Technology
Subject area: Civil and Structural Engineering Source: SCOPEDATABASE