Bioprocess Control of Sulphate Reduction in an Inverse Fluidized Bed Reactor: Role of Microbial Accumulation and Dynamic Mathematical Modelling

2020 ◽  
pp. 93-118
Author(s):  
Joana Cassidy
Keyword(s):  
Mathematical Modelling ◽  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Sulphate Reduction ◽  
Bioprocess Control ◽  
Inverse Fluidized Bed

Hydrodynamics and mathematical modelling in a low HRT inverse fluidized-bed reactor for biological sulphate reduction

2018 ◽  
Vol 41 (12) ◽  
pp. 1869-1882 ◽  
Author(s):  
Luis C. Reyes-Alvarado ◽  
Artin Hatzikioseyian ◽  
Eldon R. Rene ◽  
Eric Houbron ◽  
Elena Rustrian ◽  
...  
Keyword(s):  
Mathematical Modelling ◽  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Sulphate Reduction ◽  
Inverse Fluidized Bed

Study of the Role of Small Additions of Zr in the CVD- FBR Aluminization Process

2009 ◽  
Vol 289-292 ◽  
pp. 293-300
Author(s):  
L. Sánchez ◽  
F.J. Bolívar ◽  
M.P. Hierro ◽  
F.J. Pérez
Keyword(s):  
Fluidized Bed ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Fluidized Bed Reactor ◽  
Iron Aluminide ◽  
Martensitic Steels ◽  
Aluminide Coatings ◽  
Deposition Parameters ◽  
Zirconium Powder

In this work, iron aluminide coatings were developed by Chemical Vapor Deposition in Fluidized Bed Reactor (CVD-FBR) on ferritic-martensitic steels. Small additions of zirconium powder were introduced in the fluidized bed; as a consequence, the obtained coatings are thicker than that without zirconium additions. When Zr powders are added in the fluidized bed, the deposition atmosphere drastically changes, leading to increase the deposition rate. Thermodynamic calculations were carried out to simulate the modifications in the CVD atmosphere in the Al/Zr deposition system in comparison to the single aluminization. In order to optimize the conditions of the deposition, parameters such as temperature and concentration of zirconium introduced into the bed were evaluated and compared with the results obtained for the single aluminum deposition.

CFD study of the hydrodynamics and biofilm growth effect of an anaerobic inverse fluidized bed reactor operating in the laminar regime

2020 ◽  
pp. 104674
Author(s):  
Jorge Ramírez-Muñoz ◽  
Román Guadarrama-Pérez ◽  
Alejandro Alvarado-Lassman ◽  
José J. Valencia-López ◽  
Valaur E. Márquez-Baños
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Growth Effect ◽  
Laminar Regime ◽  
Biofilm Growth ◽  
Inverse Fluidized Bed ◽  
Reactor Operating

Anaerobic treatment of low concentration waste water in an inverse fluidized bed reactor

2000 ◽  
Vol 41 (4-5) ◽  
pp. 245-251 ◽  
Author(s):  
P. Castilla ◽  
M. Meraz ◽  
O. Monroy ◽  
A. Noyola
Keyword(s):  
Fluidized Bed ◽  
Removal Efficiency ◽  
Suspended Solids ◽  
Municipal Wastewater ◽  
Specific Activity ◽  
Biomass Concentration ◽  
Fluidized Bed Reactor ◽  
Anaerobic Treatment ◽  
Low Concentration ◽  
Inverse Fluidized Bed

Low concentration synthetic and municipal wastewaters were treated at HRT as short as 3 and 0.6 h respectively in an anaerobic inverse fluidized bed. Both bioreactors showed gas hold up due to the liquid downflow pattern of the prototype. The bioreactor operated at 3 h had a removal efficiency of 83%, specific activity of 4.5 kg CODremoved/kg IVS (d and the gas hold up varied from 23 to 55%. The reactor treating municipal wastewater had a removal efficiency of 44% when operating at 0.6 h, the specific activity was 4.2 kg CODremoved/kg IVS (d and no biogas was detected apparently because an important fraction was dissolved in the liquid phase. The biomass concentration was 13.8 and 1.1 kg IVS/m3 for synthetic and municipal wastewater and the SEM microphotographs showed a bacterial diversity for the first run and only cocci cells for the second run. The system does not remove suspended solids, so a polishing postreatment to improve water quality has to be implemented.

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