What is fluidized bed reactor in wastewater treatment?
Fluidized Bed Reactor: Is a green solution to contaminated water that uses microbes to degrade and consume harmful contaminants.
What do you mean by fluidized bed reactor?
Fluidized bed reactors (FBRs) are chemical reactors in which (catalytic) particles interact with a gas stream that is fed from the bottom, such that the mixture (emulsion phase) behaves as a fluid.
What are fluidised beds used for?
Fluidized beds are used for several purposes, such as fluidized bed reactors (types of chemical reactors), solids separation, fluid catalytic cracking, fluidized bed combustion, heat or mass transfer or interface modification, such as applying a coating onto solid items.
What is anaerobic fluidized bed reactor?
In a fluidized bed reactor, fine carrier particles are used for the microbial film development. These particles with entrapped biofilm are fluidized by high upflow fluid velocities generated by a combination of the influent and recirculated effluents.
What are packed bed reactors used for?
Packed bed reactors are very versatile and are used in many chemical processing applications such as absorption, distillation, stripping, separation processes, and catalytic reactions. Across the diverse applications in which they are used, the physical dimensions of the beds can vary greatly.
What are the characteristics of fluidized bed reactor?
The distinguishing feature of a fluidized bed reactor is that the bed of solid particles or catalyst is supported by an upflow of gas. This reactor provides easy loading and removal of catalyst. This is advantageous when the solids bed must be removed and replaced frequently.
What is the difference between packed bed and fluidized bed?
Excellent mixing of reactants in the fluidised bed helps to minimise temperature variations and renders this system attractive for carrying out gas–solid reactions. The fluidised bed reactors show better conversion of reactants in comparison with packed beds when solid reactants are used in the form of small pellets.
What is the difference between fluidized bed and packed bed?
What are the types of fluidized bed boiler?
6.3 Types of Fluidised Bed Combustion Boilers 1. Atmospheric classic Fluidised Bed Combustion System (AFBC) 2. Atmospheric circulating (fast) Fluidised Bed Combustion system(CFBC) 3. Pressurised Fluidised Bed Combustion System (PFBC).
Where are fluidized bed combustion located?
Fluidized Bed Combustion takes place when the forced draught fan supplies air to the Furnace of the Boiler. In the furnace, and is (used for Bubbling phenomenon) placed on the Bed and is heated before fluidization, the air enters the bed from the nozzles fitted on the Furnace Bed.
What is the application of fluidized bed reactor in biological wastewater treatment?
Although the application of fluidized bed reactor in biological wastewater treatment is well established with many large-scale plants in existence, its application in advanced oxidation processes is mostly at laboratory-scale.
What is the minimum fluidization velocity in fluidized bed reactor?
The larger the granule size, the higher the minimum fluidization velocity. Tisa et al. (2014) indicate that the minimum flow rate for liquid in fluidized bed reactor was 0. 1617 L/min obtained from the calculated minimum fluidization velocity and the settling velocity of the particle was 0. 0365 m/s. Ali et al.
Can fluidized bed bioreactors characterize biofilm microbial characterization?
Two lab-scale anaerobic fluidized bed bioreactors (AnFBRs) treating primary sludge (PS) and thickened waste activated sludge (TWAS) were studied to explore biofilm microbial characterization.
What is the fluidization treatment of oilfield produced water and oil refinery wastewater?
Oilfield produced water and oil refinery wastewater are strongly acidic (pH 3-4), have a high chemical oxygen demand (1200-2600 mg/L), high polyphenol content (23 mg/L) and are highly variable. Primary attention is focused on the fluidization treatment of oilfield produced water and oil refinery wastewater, mainly by inverse fluidization.