scholarly journals Kinetics of biodegradation of diesel fuel by enriched microbial consortia from polluted soils

2012 ◽  
Vol 9 (4) ◽  
pp. 749-758 ◽  
Author(s):  
E. Moliterni ◽  
R. G. Jiménez-Tusset ◽  
M. Villar Rayo ◽  
L. Rodriguez ◽  
F. J. Fernández ◽  
...  
Author(s):  
Юрий Николаевич Рыбаков ◽  
Александр Васильевич Дедов ◽  
Роман Игоревич Кюннап ◽  
Сергей Владимирович Ларионов

Исследована проницаемость фторированного полиэтилена высокого давления (ПВД), предназначенного для изготовления ремонтных и технологических вкладышей резервуаров складов временного хранения топлива. Использование таких вкладышей позволяет снизить технологические потери углеводородов и увеличить надежность хранилищ из полимерных материалов. В качестве объекта исследования использовали пленки ПВД 10204-003 толщиной 100 мкм. Проницаемость пленок определяли при контакте с бензином марок Нормаль-80, Премиум-95, авиационным керосином ТС-1 и дизельным топливом. Рассмотрен механизм формирования структуры поверхностного фторированного слоя. Исследована кинетика изменения коэффициента проницаемости исходного и модифицированного полиэтилена в течение возможного срока хранения топлив. По результатам исследования установлено: 1) в полиэтилене перенос топлива протекает в две стадии, что определяется раздельной диффузией низкомолекулярных и высокомолекулярных фракций углеводородов; 2) фторирование полиэтилена приводит к уменьшению коэффициента проницаемости (что имеет практическое значение для сохранения качества топлива), но не влияет на перенос фракции углеводородов минимальной молекулярной массы. The permeability of fluorinated high-pressure polyethylene (HDPE), intended for the manufacture of repair and technological liners of tanks for temporary fuel storage has been investigated. As the object of research, 10204-003 HDPE films with 100 μm thickness were used. The permeability of the films was determined by contact with gasoline of the Normal-80 and Premium-95 brands, aviation kerosene TS-1, and diesel fuel. The formation mechanism of the surface fluorinated layer structure was considered. The kinetics of changes in the permeability coefficient of the original and modified polyethylene during the possible fuel storage period has been studied. It has been established that the transfer of fuel in polyethylene proceeds in two stages, which is determined by the separate diffusion of low-molecular and high-molecular hydrocarbon fractions. Fluoridation of polyethylene decreases the permeability coefficient, but does not affect the transfer of hydrocarbon fraction with the minimum molecular weight.


The kinetic dependencies of the utilization of fatty acid esters and diesel fuel have been determined in order to develop a biological product using the bacteria Pseudomonas for biodegradation of biodiesel. The kinetics of substrate consumption over time was studied, and the effect of the concentration of each of the substrates and their mixtures on the rate of utilization of biodiesel was considered. Keywords biodiesel; biodegradation; kinetics; substrate consumption; fatty acid esters; diesel fuel


2009 ◽  
Vol 84 (3) ◽  
pp. 545-553 ◽  
Author(s):  
Mikołaj Owsianiak ◽  
Alicja Szulc ◽  
Łukasz Chrzanowski ◽  
Paweł Cyplik ◽  
Mariusz Bogacki ◽  
...  

2008 ◽  
Vol 26 (2) ◽  
pp. 208-216 ◽  
Author(s):  
V. Selvavathi ◽  
A. Meenakshisundaram ◽  
B. Sairam ◽  
B. Sivasankar

2005 ◽  
Vol 161 (1-4) ◽  
pp. 353-363 ◽  
Author(s):  
Geeta Kandpal ◽  
P. C. Srivastava ◽  
Bali Ram

2014 ◽  
Vol 592-594 ◽  
pp. 1647-1651
Author(s):  
S.P. Sivapirakasham ◽  
A. Afsal Khan ◽  
Mane G. Yogesh ◽  
R. Anand

Now a day biodiesel becomes best alternative for diesel fuel. Thermogravimetry technique has great acceptance in the field of fossil fuel. The thermal and kinetics properties of diesel and Jatropha biodiesel are analyzed by using popular technique of thermogravimetry. The aim is to study the behavior of diesel, biodiesel and their blends in Nitrogen gas atmosphere at the heating rate of 5K/min, 10K/min and 15K/min from 30°C to 600°C. From study it is found that as heating rate increases peak is shifting toward higher value which shows that there is less uniform heating. The study clearly shows biodiesel is more stable than diesel indicating that transesterification make sample less stable. The Arrehenius Kinetic model is applied to study the activation energy. As percentage of biodiesel increases, stability of sample increases and hence increases in activation energy


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