scholarly journals The Influence of Oil Concentration, Nitrogen and Phosphorus Composition on Crude Oil Biodegradation by Epyzim and Mixed Cultures of Pseudomonas aeruginosa and Arthrobacter simplex

2008 ◽  
Vol 2 (3) ◽  
pp. 146-149
Author(s):  
ERLIZA NOOR ◽  
LINAWATI HARDJITO
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Crude Oil ◽  
Mixed Cultures ◽  
Nitrogen And Phosphorus ◽  
Arthrobacter Simplex ◽  
Oil Biodegradation ◽  
Oil Concentration

Crude oil biodegradation potential of biosurfactant-producing Pseudomonas aeruginosa and Meyerozyma sp.

2021 ◽  
pp. 126276
Author(s):  
Ramla Rehman ◽  
Muhammad Ishtiaq Ali ◽  
Naeem Ali ◽  
Malik Badshah ◽  
Mazhar Iqbal ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Crude Oil ◽  
Oil Biodegradation

Effect of Organic Nutrient Addition to the Biodegradation of Hydrocarbon Contaminated Marine Sediment in Malaysia

2019 ◽  
Vol 797 ◽  
pp. 74-83
Author(s):  
Azzah Nazihah binti Che Abdul Rahim ◽  
Muhammad Ridzuan Zahid ◽  
Putri Faizura Megat Khamaruddin ◽  
Nik Raikhan Nik Him ◽  
Nur Hidayati Othman ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Organic Matter ◽  
Crude Oil ◽  
Soil Sample ◽  
Marine Sediment ◽  
Degradation Rate ◽  
Elaeis Guineensis ◽  
Nutrient Addition ◽  
Organic Nutrient ◽  
Oil Concentration

The effect of organic nutrient on the biodegradation of hydrocarbon contaminated marine sediment in Malaysia was investigated. Biodegradation was assessed in microcosm experiments containing 10% (w/w) of crude oil amended with fertilizers in three ways, which were with inorganic nutrients (NP), organic matter in the form of plant-based (Elaeis guineensis) and fish-amendments (Scomber australasicus). It was observed that hydrocarbon degradation occurred in all treatments, with the highest biodegradation rates inS. australasicussupplemented sediment. The addition of S. australasicus managed to reduce the oil concentration to 48% while the addition ofE. guineensisand inorganic NP reduced the final oil concentration to 66% and 63% respectively. All three amendments show faster degradation rate compared to the control. Isolation of the soil sample on specific nutrient agar, centrimide, revealed the presence of Pseudomonas aeruginosa that are well known for its ability to degrade hydrocarbon in crude oil.

Response surface analysis and modeling of n-alkanes removal through bioremediation of weathered crude oil

2011 ◽  
Vol 63 (4) ◽  
pp. 618-626 ◽  
Author(s):  
Leila Mohajeri ◽  
Hamidi Abdul Aziz ◽  
Mohammad Ali Zahed ◽  
Soraya Mohajeri ◽  
Shamsul Rahman Mohamed Kutty ◽  
...  
Keyword(s):  
Crude Oil ◽  
Response Surface ◽  
Natural Attenuation ◽  
Coastal Sediments ◽  
Nitrogen And Phosphorus ◽  
Bacterial Inoculum ◽  
Oil Concentration ◽  
Excessive Nutrients ◽  
Optimized Conditions ◽  
Central Composite

Central composite design (CCD) and response surface methodology (RSM) were employed to optimize four important variables, i.e. amounts of oil, bacterial inoculum, nitrogen and phosphorus, for the removal of selected n-alkanes during bioremediation of weathered crude oil in coastal sediments using laboratory bioreactors over a 60 day experimentation period. The reactors contained 1 kg soil with different oil, microorganisms and nutrients concentrations. The F Value of 26.89 and the probability value (P < 0.0001) demonstrated significance of the regression model. For crude oil concentration of 2, 16 and 30 g per kg sediments and under optimized conditions, n-alkanes removal was 97.38, 93.14 and 90.21% respectively. Natural attenuation removed 30.07, 25.92 and 23.09% n-alkanes from 2, 16 and 30 g oil/kg sediments respectively. Excessive nutrients addition was found to inhibit bioremediation.

scholarly journals Evaluation of crude oil biodegradation using mixed fungal cultures

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0256376
Author(s):  
Abeer R. M. Abd El-Aziz ◽  
Monira R. Al-Othman ◽  
Sameh M. Hisham ◽  
Shereen M. Shehata
Keyword(s):  
Crude Oil ◽  
Aspergillus Terreus ◽  
Date Palm ◽  
Incubation Temperature ◽  
Normal Alkanes ◽  
Oil Biodegradation ◽  
Initial Ph ◽  
Polycyclic Aromatic ◽  
Oil Concentration ◽  
Fungal Consortium

The use of potent fungal mixed cultures is a promising technique for the biodegradation of crude oil. Four isolates of fungi, namely, Alternaria alternata (AA-1), Aspergillus flavus (AF-3), Aspergillus terreus (AT-7), and Trichoderma harzianum (TH-5), were isolated from date palm soil in Saudi Arabia. The mixed fungal of the four isolates have a powerful tool for biodegradation up to 73.6% of crude oil (1%, w/v) in 14 days. The fungal consortium no. 15 containing the four isolates (1:1:1:1) performed significantly better as a biodegradation agent than other consortium in a variety of environmental factors containing crude oil concentration, incubation temperature, initial pH, biodegradation time and the salinity of the medium. The fungal consortium showed better performance in the biodegradation of normal alkanes (n-alkanes) than that of the polycyclic aromatic hydrocarbons (PAHs); the biodegradation efficiency of normal alkanes of the fungal consortium (67.1%) was clearly high than that of the PAHs (56.8%).

Effect of Initial Oil Concentration and Dispersant on Crude Oil Biodegradation in Contaminated Seawater

2010 ◽  
Vol 84 (4) ◽  
pp. 438-442 ◽  
Author(s):  
Mohammad Ali Zahed ◽  
Hamidi Abdul Aziz ◽  
Mohamed Hasnain Isa ◽  
Leila Mohajeri
Keyword(s):  
Crude Oil ◽  
Oil Biodegradation ◽  
Oil Concentration

scholarly journals Effects of Dispersants and Biosurfactants on Crude-Oil Biodegradation and Bacterial Community Succession

2021 ◽  
Vol 9 (6) ◽  
pp. 1200
Author(s):  
Gareth E. Thomas ◽  
Jan L. Brant ◽  
Pablo Campo ◽  
Dave R. Clark ◽  
Frederic Coulon ◽  
...  
Keyword(s):  
Crude Oil ◽  
Early Stage ◽  
Niche Partitioning ◽  
Hydrocarbon Biodegradation ◽  
Hydrocarbonoclastic Bacteria ◽  
Bacterial Response ◽  
Oil Biodegradation ◽  
Interfacial Surface ◽  
Degrading Bacteria ◽  
Oil Spill Response

This study evaluated the effects of three commercial dispersants (Finasol OSR 52, Slickgone NS, Superdispersant 25) and three biosurfactants (rhamnolipid, trehalolipid, sophorolipid) in crude-oil seawater microcosms. We analysed the crucial early bacterial response (1 and 3 days). In contrast, most analyses miss this key period and instead focus on later time points after oil and dispersant addition. By focusing on the early stage, we show that dispersants and biosurfactants, which reduce the interfacial surface tension of oil and water, significantly increase the abundance of hydrocarbon-degrading bacteria, and the rate of hydrocarbon biodegradation, within 24 h. A succession of obligate hydrocarbonoclastic bacteria (OHCB), driven by metabolite niche partitioning, is demonstrated. Importantly, this succession has revealed how the OHCB Oleispira, hitherto considered to be a psychrophile, can dominate in the early stages of oil-spill response (1 and 3 days), outcompeting all other OHCB, at the relatively high temperature of 16 °C. Additionally, we demonstrate how some dispersants or biosurfactants can select for specific bacterial genera, especially the biosurfactant rhamnolipid, which appears to provide an advantageous compatibility with Pseudomonas, a genus in which some species synthesize rhamnolipid in the presence of hydrocarbons.

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