scholarly journals The Waste Oil Resulting from Crude Oil Microbial Biodegradation in Soil

10.5772/31037 ◽  
2012 ◽  
Author(s):  
Anatoly M. ◽  
Vladimir V. ◽  
Alexander M.
Keyword(s):  
Crude Oil ◽  
Waste Oil ◽  
Microbial Biodegradation ◽  
Biodegradation In Soil

scholarly journals Synthesis of Alkyl Aliphatic Hydrazine and Application in Crude Oil as Flow Improvers

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4703
Author(s):  
Qiang Deng ◽  
Michal Slaný ◽  
Huani Zhang ◽  
Xuefan Gu ◽  
Yong-Fei Li ◽  
...  
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
Alkyl Chain ◽  
Reduction Rate ◽  
Viscosity Reduction ◽  
Polar Group ◽  
Waste Oil ◽  
Viscosity Reducer ◽  
Oilfield Chemicals ◽  
Long Alkyl Chain

In this paper, alkyl aliphatic hydrazine, which is different from traditional polymer fluidity improver, was synthesized from aliphatic hydrazine and cetane bromide, and evaluated as a pour point and viscosity-reducer depressant for crude oil. The evaluation results showed that alkyl aliphatic hydrazone fully reduced the pour point and viscosity of crude oil with the increase of crude oil fluidity. The viscosity reduction rate of crude oil in Jinghe oilfield was 79.6%, and the pour point was reduced by about 11.3 °C. The viscosity reduction rate of crude oil in Xinjiang Oilfield was 74.7%, and the pour point was reduced by 8.0 °C. The long alkyl chain is beneficial to the eutectic of wax in crude oil, and the polar group inhibits the crystal growth, resulting in the decrease of pour point and viscosity. The waste oil is fully recycled into oilfield chemicals.

Biodegradation rates of components of petroleum

1976 ◽  
Vol 22 (8) ◽  
pp. 1209-1213 ◽  
Author(s):  
J. D. Walker ◽  
R. R. Colwell ◽  
L. Petrakis
Keyword(s):  
Mass Spectrometry ◽  
Crude Oil ◽  
Computer Analysis ◽  
Microbial Degradation ◽  
Dynamic Process ◽  
Logarithmic Phase ◽  
Total Residue ◽  
Microbial Biodegradation ◽  
Maximum Decrease ◽  
South Louisiana

Rates of microbial biodegradation of components of South Louisiana crude oil were determined by computer analysis of data obtained from computerized mass spectrometry. Total residue of the oil decreased exponentially with time, with maximum decrease noted at logarithmic phase, whereas asphaltenes and resins increased at the logarithmic phase of growth. Saturates decreased continuously during growth. Microbial degradation of components of crude oil was concluded to be a dynamic process.

scholarly journals Microbial Biodegradation of Paraffin Wax in Malaysian Crude Oil Mediated by Degradative Enzymes

2020 ◽  
Vol 11 ◽  
Author(s):  
Nur Aina Adlan ◽  
Suriana Sabri ◽  
Malihe Masomian ◽  
Mohd Shukuri Mohamad Ali ◽  
Raja Noor Zaliha Raja Abd Rahman
Keyword(s):  
Crude Oil ◽  
Paraffin Wax ◽  
Microbial Biodegradation ◽  
Degradative Enzymes

Culture of PRJ-1 Demulsifying Bacteria and Performance Evaluation

2011 ◽  
Vol 356-360 ◽  
pp. 2055-2059
Author(s):  
Qing Wang Liu ◽  
Yong Kun Zhang ◽  
Xu Dong Lei ◽  
Yong Hui Zhang
Keyword(s):  
Performance Evaluation ◽  
Crude Oil ◽  
Production Cost ◽  
Carbon Sources ◽  
Industrial Scale ◽  
Waste Oil ◽  
Cell Concentrations ◽  
And Performance ◽  
Water Cut ◽  
Demulsification Efficiency

Bio-demulsifier has not been applied in industrial scale due to its production cost. In order to reduce the production cost and improve the efficiency of demulsification, cheap materials such as oilfield sludge, workshop waste oil and edible waste oil were used in experiments as carbon sources to culture PRJ-1 demulsifying bacteria. As a result, cell concentrations of 5.4g/L, 3.7g/L and 4.2g/L were gotten, which were higher than the concentration of 2.6g/L cultivated by using paraffin. PRJ-1 demulsifying bacteria were used to prepare the demulsifying solution with a concentration of 10g/L, which was used in the demulsification experiment on Liaohe crude oil with a water cut of 80%. With 100 ml/L being added into the crude oil, the demulsification efficiency at 12h reached 91%, which was higher than that of 100mg/L chemical demulsifier. Demulsification efficiency of 96% can be achieved by using the combination of 60ml/L demulsifying bacteria and 40mg/L chemical demulsifier, furthermore, the demulsifying speed was higher and dehydrated water was clearer.

Role of Composite Adsorbents Based on Polyurethane/nanoclay Foam in Removing Oil Contaminants in a Continuous Treatment Process

2021 ◽  
Author(s):  
Manijeh khorsi
Keyword(s):  
Crude Oil ◽  
Polyurethane Foam ◽  
Structural Investigation ◽  
Regular Structure ◽  
Continuous Treatment ◽  
Aquatic Environments ◽  
Waste Oil ◽  
Nanoparticle Distribution ◽  
Composite Adsorbents

Abstract This study was conducted to use nanoclay as an adsorbent for waste oil treatment and removal of oil contaminants from aquatic environments. Nanoclay was dispersed in a polyurethane foam bed. The results of morphological and structural investigation revealed that by adding nanoclay, the regular structure of the foam was decreased compared with the pure polyurethane foam and the diameter of the cells was increased. The presence of the nanoclay was also confirmed by the FTIR analysis, and the possibility of nanoparticle distribution was analyzed by XRD. To perform the experiments, a vessel was built to hold the adsorbent. The emulsions of crude oil with different concentrations were made and passed through the vessel containing 35 g of adsorbent with different flow rates. The proper flow rate and concentration of crude oil in the input feed were optimized by 50 L/hour and 500 mg/L, respectively. After performing the adsorption process, the turbidity analysis was firstly performed on the samples and the proper samples were then analyzed by COD, TOC, and TOG/TPH. The results of the LPSA analysis indicated that the diameter of the dispersed phase particles in the input feed was between 0.3 and 5 μm. The results of TOG/TPH analysis showed that the removal efficiency of oil, grease, and hydrocarbons both reached about 99% and the efficiency of COD and TOC both reached 94%. The experiment was also performed on the removal of diesel fuel from the aquatic environment, and the results of COD and turbidity analyses showed an efficiency of 96% and 98%, respectively.

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