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Document Type |
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Article In Journal |
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Document Title |
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The potentiality of free Gram-negative bacteria for removing oil and grease from contaminated industrial effluents The potentiality of free Gram-negative bacteria for removing oil and grease from contaminated industrial effluents |
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Subject |
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The potentiality of free Gram-negative bacteria for removing oil and grease |
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Document Language |
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English |
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Abstract |
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Eight bacterial species were isolated from vegetable oil and grease-contaminated industrial wastewater, only four of
which were found to have the ability to degrade oil and grease in the contaminated wastewater. These isolates were
identified according to morphological and biochemical profiles as, Pseudomonas sp. (L1), P. diminuta (L2),
P. pseudoalcaligenes (L3), and Escherichia sp. (L5). The degradative capabilities of the identified bacterial isolates
for Tween 20 (Tw20) were investigated under different pH levels (6.5, 7, 7.5, and 8), different temperatures (30 and
37 C) and different concentrations of Tw20 (1, 1.5, and 2%). Results revealed differences in their optimum
conditions for maximum degradation of vegetable oil. Bacterial isolates were tested individually or in combinations
using synthetic aqueous medium supplemented with 1% palm oil, incubated at 30 C, and agitated at 150 rev/min
for 13 days. All the tested bacteria were able to degrade the palm oil completely and utilized the free fatty acids
(FFA) as a carbon source. The combination M1 (Pseudomonas sp. and P. diminuta) produced the highest
degradative activity, followed by M3 (Pseudomonas sp., P. diminuta and P. pseudoalcaligenes). Also M1 produced
the highest activity in reducing COD (93%) and BOD5 (100%). |
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ISSN |
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00 |
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Journal Name |
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World Journal of Microbiology & Biotechnology |
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Volume |
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21 |
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Issue Number |
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7 |
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Publishing Year |
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1426 AH
2005 AD |
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Number Of Pages |
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8 |
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Article Type |
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Article |
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Added Date |
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Sunday, June 21, 2009 |
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Researchers
| 0 | Ebtesam | Investigator | Doctorate | |
| 0 | Mohamed | Researcher | Doctorate | |
| 0 | Nawal | Researcher | Doctorate | |
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