Growth kinetics of an indigenous mixed microbial consortium during phenol degradation in a batch reactor

The current paper studies the viability of using a Batch reactor, by five types of Al-Fe pillared clay that prepared from five regions in Iraq for phenol degradation in synthetic wastewater. The operation condition study through variables in (pH, pressure, temperature, pillared load, phenol load). The findings have illustrated that phenol degradation could be increase via incrementing temperature, pressure, pillared load and degrease in phenol load. Phenol good degradation proportion which was 97 %, has been achieved at optimum proportion (pH= 3.9, temperature = 150 °C, pressure = 3.5 MPa, in addition to phenol concentration = 500 mg/l). The two models power-law and Langmuir−Hinshelwood have been used to study the catalytic kinetics of the phenol degradation. From results shown the activation energy for every response equivalent to (37114.014 j/mol) for Anbar (37795, 48783.9, 36628, 40785 j/mol) for Erbil, Mosul, Baghdad and Basra respectively. It was proved that the reaction in this study is under kinetics control.

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Kinetics of phenol degradation by activated sludge: Value of measurements in a batch reactor

Water Research ◽

10.1016/0043-1354(79)90176-3 ◽

1979 ◽

Vol 13 (12) ◽

pp. 1305-1309 ◽

Cited By ~ 11

Author(s):

Paolo Beltrame ◽

Pier Luigi Beltrame ◽

Paolo Carniti ◽

Demetrio Pitea

Keyword(s):

Activated Sludge ◽

Batch Reactor ◽

Phenol Degradation ◽

Kinetics Of

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Recovery of mangrove sediment contaminated with fuel oil by endogenous microbial consortium

Ciência e Natura ◽

10.5902/2179460x39667 ◽

2020 ◽

Vol 42 ◽

pp. e6

Author(s):

Amanda Ferreira Santos Silva ◽

Thomas Wendell Fernandes dos Santos ◽

Norma Buarque de Gusmão ◽

Persio Alexandre da Silva ◽

Thais De Melo Castelo Branco ◽

...

Keyword(s):

Degradation Rate ◽

Microbial Consortium ◽

Degradation Kinetics ◽

Phenol Degradation ◽

Fractional Factorial ◽

Fuel Oil ◽

Lubricating Oil ◽

Mangrove Sediment ◽

Process Conditions ◽

Kinetics Of

This work aimed to select a microbial consortium enriched with isolated microorganisms of mangrove sediment as to its capacity to recover sediment contaminated by lubricating oil. The promising microorganisms were selected using the colorimetric dichlorophenol indophenol technique (DCPIP) using lubricating oil as the carbon source, to evaluate the emulsifying and enzymatic activity of the microorganisms. The antagonism test was also used for further evaluation of the consortia. The fractional factorial experimental design methodology (2n) was used to establish the process conditions for the subsequent accomplishment of the degradation kinetics of the lubricating oil by the selected microorganisms and consortium. Eight bacteria and three fungi were evaluated, of which five were selected with a 36 h turn of the DCPIP indicator. Eleven microorganisms produce emulsifying substances and five produce enzymes. The results showed that the best consortium was B5F2F4, with a degradation rate of 95% of the phenol at 70 rpm in 250 μL of the oil. The kinetics of oil degradation showed a phenol degradation rate of 65% after 24 days of treatment. The microorganisms are suitable for the degradation of phenol, the main constituent of the oil, and can be used as a recovery model for environments contaminated with hydrocarbons.

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Studying the Phenol Degradation in Synthetic Wastewater by Catalytic Wet Air Oxidation Process in Batch Reactor

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i4.20.27399 ◽

2018 ◽

Vol 7 (4.20) ◽

pp. 594

Author(s):

Ghayda Yaseen AL Kindi ◽

Faris Hammoodi AL Ani ◽

. .

Keyword(s):

Batch Reactor ◽

Phenol Degradation ◽

Pillared Clay ◽

Synthetic Wastewater ◽

Air Oxidation ◽

Wet Air Oxidation ◽

Operation Condition ◽

Optimum Proportion ◽

Catalytic Kinetics ◽

Kinetics Of

The current paper studies the viability of using a Batch reactor, by five types of Al-Fe pillared clay that prepared from five regions in Iraq for phenol degradation in synthetic wastewater. The operation condition study through variables in (pH, pressure, temperature, pillared load, phenol load). The findings have illustrated that phenol degradation could be increase via incrementing temperature, pressure, pillared load and degrease in phenol load. Phenol good degradation proportion which was 97 %, has been achieved at optimum proportion (pH= 3.9, temperature = 150 °C, pressure = 3.5 MPa, in addition to phenol concentration = 500 mg/l). The two models power-law and Langmuir−Hinshelwood have been used to study the catalytic kinetics of the phenol degradation. From results shown the activation energy for every response equivalent to (37114.014 j/mol) for Anbar (37795, 48783.9, 36628, 40785 j/mol) for Erbil, Mosul, Baghdad and Basra respectively. It was proved that the reaction in this study is under kinetics control.

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The Ordered Phase Formation in Ti-Al-Ga Alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100069193 ◽

1970 ◽

Vol 28 ◽

pp. 440-441

Author(s):

Shiro Fujishiro ◽

Harold L. Gegel

Keyword(s):

Thermal Stability ◽

High Temperature ◽

Titanium Alloys ◽

Growth Kinetics ◽

Stoichiometric Composition ◽

Good Potential ◽

Alpha Titanium ◽

Cold Rolled ◽

Kinetics Of ◽

Thermal Stability Of

Ordered-alpha titanium alloys having a DO19 type structure have good potential for high temperature (600°C) applications, due to the thermal stability of the ordered phase and the inherent resistance to recrystallization of these alloys. Five different Ti-Al-Ga alloys consisting of equal atomic percents of aluminum and gallium solute additions up to the stoichiometric composition, Ti3(Al, Ga), were used to study the growth kinetics of the ordered phase and the nature of its interface.The alloys were homogenized in the beta region in a vacuum of about 5×10-7 torr, furnace cooled; reheated in air to 50°C below the alpha transus for hot working. The alloys were subsequently acid cleaned, annealed in vacuo, and cold rolled to about. 050 inch prior to additional homogenization

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Growth Kinetics of Quantum Size ZnO Particles

MRS Proceedings ◽

10.1557/proc-536-347 ◽

1998 ◽

Vol 536 ◽

Author(s):

E. M. Wong ◽

J. E. Bonevich ◽

P. C. Searson

Keyword(s):

Growth Kinetics ◽

Ostwald Ripening ◽

Chemical Potential ◽

Colloidal Suspensions ◽

Green Emission ◽

Blue Shift ◽

Constant Current ◽

Mass Model ◽

Zno Particles ◽

Kinetics Of

AbstractColloidal chemistry techniques were used to synthesize ZnO particles in the nanometer size regime. The particle aging kinetics were determined by monitoring the optical band edge absorption and using the effective mass model to approximate the particle size as a function of time. We show that the growth kinetics of the ZnO particles follow the Lifshitz, Slyozov, Wagner theory for Ostwald ripening. In this model, the higher curvature and hence chemical potential of smaller particles provides a driving force for dissolution. The larger particles continue to grow by diffusion limited transport of species dissolved in solution. Thin films were fabricated by constant current electrophoretic deposition (EPD) of the ZnO quantum particles from these colloidal suspensions. All the films exhibited a blue shift relative to the characteristic green emission associated with bulk ZnO. The optical characteristics of the particles in the colloidal suspensions were found to translate to the films.

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Growth kinetics of boride layers formed on GGG 40.3 ductile iron

Materials Testing ◽

10.3139/120.110866 ◽

2016 ◽

Vol 58 (5) ◽

pp. 418-421

Author(s):

Fatma Ünal ◽

Ahmet Topuz

Keyword(s):

Growth Kinetics ◽

Ductile Iron ◽

Kinetics Of

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