Enhanced biodegradation and emulsification of crude oil and hyperproduction of biosurfactants by a gamma ray-induced mutant of Pseudomonas aeruginosa

1995 ◽  
Vol 21 (3) ◽  
pp. 176-179 ◽  
Author(s):  
S. Iqbal ◽  
Z.M. Khalid ◽  
K.A. Malik
2021 ◽  
pp. 126276
Author(s):  
Ramla Rehman ◽  
Muhammad Ishtiaq Ali ◽  
Naeem Ali ◽  
Malik Badshah ◽  
Mazhar Iqbal ◽  
...  

2021 ◽  
Author(s):  
Bobby Chettri ◽  
Ningombam Anjana Singha ◽  
Arvind Kumar Singh

Abstract We report kinetics of Assam crude oil degradation by Pseudomonas aeruginosa AKS1 and Bacillus sp. AKS2, both isolated from Assam refinery sediments. The isolates exhibited appreciable degrees of hydrophobicity, emulsification index and biosurfactant production. Crude oil degradation efficiency of isolates was assessed in (1) liquid medium amended with 1% v/v crude oil and (2) microcosm sediments (125 mg crude oil/ 10 g sand). In liquid culture, the biodegradation rate (k) and half-life (t1/2) values were found to be 0.0383 day -1 and 18.09 days for P. aeruginosa AKS1, and 0.0204 day -1 and 33.97 days in case of Bacillus sp. AKS2. In microcosm sand sediments, the estimated biodegradation rate (k) and half-life (t 1/2) values were 0.0138 day -1 and 50 days for P. aeruginosa AKS1, and 0.0113 day -1 and 61.34 days in case of Bacillus sp. AKS2. The level of nutrient treatment in microcosm sand sediment was 125 µg N & 62.5 µg P/g sediment in case of P. aeruginosa AKS1 and 375 µg N & 37.5 µg P/g sediment in case of Bacillus sp. AKS2. In microcosms without inorganic nutrients, biodegradation rate (k) and half-life (t1/2) values were found to be 0.0069 day -1 and 100 days for P. aeruginosa AKS1 and for Bacillus sp. AKS2, the respective values were found to be 0.0046 day -1 and 150.68 days. Our data provides important information for predictive hydrocarbon degradation in liquid medium and contaminated sediments.


2016 ◽  
Vol 216 ◽  
pp. 548-558 ◽  
Author(s):  
Bobby Chettri ◽  
Arghya Mukherjee ◽  
James S. Langpoklakpam ◽  
Dhrubajyoti Chattopadhyay ◽  
Arvind K. Singh

2014 ◽  
Vol 172 (7) ◽  
pp. 3433-3447 ◽  
Author(s):  
Yu Chen ◽  
Chen Li ◽  
Zhengxi Zhou ◽  
Jianping Wen ◽  
Xueyi You ◽  
...  

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