Development of a Countercurrent Multistage Fluidized-Bed Reactor and Mathematical Modeling for Prediction of Removal Efficiency of Sulfur Dioxide from Flue Gases

2009 ◽  
Vol 48 (3) ◽  
pp. 1629-1637 ◽  
Author(s):  
C. R. Mohanty ◽  
G. Malavia ◽  
B. C. Meikap
Keyword(s):  
Mathematical Modeling ◽  
Sulfur Dioxide ◽  
Fluidized Bed ◽  
Removal Efficiency ◽  
Fluidized Bed Reactor ◽  
Flue Gases ◽  
Multistage Fluidized Bed

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.

CO2 capture from flue gases using a fluidized bed reactor with limestone

2009 ◽  
Vol 26 (5) ◽  
pp. 1414-1421 ◽  
Author(s):  
Fan Fang ◽  
Zhen-shan Li ◽  
Ning-sheng Cai
Keyword(s):  
Fluidized Bed ◽  
Co2 Capture ◽  
Fluidized Bed Reactor ◽  
Flue Gases

Countercurrent multistage fluidized bed reactor for immobilized biocatalysts: I. Modeling and simulation

1990 ◽  
Vol 36 (4) ◽  
pp. 367-376 ◽  
Author(s):  
Henk J. Vos ◽  
Dick J. Groen ◽  
Jacques J. M. Potters ◽  
Karel Ch. A. M. Luyben
Keyword(s):  
Modeling And Simulation ◽  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Multistage Fluidized Bed

Anaerobic treatment of sulfate-containing municipal wastewater with a fluidized bed reactor at 20 °C

2016 ◽  
Vol 73 (10) ◽  
pp. 2446-2452 ◽  
Author(s):  
B. Düppenbecker ◽  
P. Cornel
Keyword(s):  
Fluidized Bed ◽  
Removal Efficiency ◽  
Municipal Wastewater ◽  
Oxygen Demand ◽  
Fluidized Bed Reactor ◽  
Anaerobic Treatment ◽  
Cod Removal ◽  
Sulfate Reducing ◽  
Mass Flows ◽  
Reducing Bacteria

This study focuses on the anaerobic treatment of sulfate-containing municipal wastewater at 20 °C with a fluidized bed reactor. Mean influent chemical oxygen demand (COD) and sulfate concentrations were 481 and 96 mg/l. The response of the COD removal efficiency to increasing organic loading rates (OLR) was investigated. Average total COD removal was 61% at OLR between 2.7 and 13.7 kg COD/(m³·d) and did not distinctly depend on the OLR. To assess the removal efficiency in more detail the COD in- and output mass flows were balanced. The results showed that only 11–12% of the input COD was recovered as gaseous methane. About 12–13% of the input COD remained in the effluent as dissolved methane. Furthermore, a distinct amount of 12–19% of the input COD remained in the reactor as settled sludge and was not further biologically degraded. Due to the reduction by sulfate-reducing bacteria, 13–14% of the input COD was degraded. Further adverse impacts of the influent sulfate on the anaerobic treatment process are discussed as well.

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