Why sparger is used in fermenter?

Why sparger is used in fermenter?

The device such as sparger is used to introduce the air in the fermenter. Aerators producing fine bubble should be used. Oxygen is easily transfer through the sparger to greater amount with the large bubbles which has less surface area than the smaller bubbles.

What are the main parts of a fermenter?

The following components of the fermenter are required for aeration and agitation: (t) agitator (impeller), (ii) stirrer glands and bearings, (iii) baffles, and (iv) sparger (the aeration system). Agitator (Impeller):

What is agitator in fermenter?

Agitators have been used in fermenters for many years. The functions of the mixer in fermentation processes requiring dispersion of air or oxygen in a broth are that they: Provide uniform dispersion of gas bubbles. Produce small gas bubbles by shearing the inlet gas with fluid velocity gradients.

What is the function of stirrer in fermenter?

The primary function of the stirrer shaft is to transmit torque from the stirrer motor to the impeller. Torque is the tendency of a force to cause an object to rotate. The magnitude of the torque around the shaft axis is related to the power required for operation of the impeller.

Which material can not be used to construct fermenter?

Cheaper grades of stainless steel may be used for the jacket and other surfaces isolated from the broth. Copper and copper-containing materials must be avoided in all parts of the fermenter contacting the culture because of its toxic effect on cells.

What is fermenter and its types?

TYPES OF FERMENTER: Following are the types of fermenter • Airlift Fermenter: • Continuous Stirred Tank Bioreactors: • Photo-Bioreactors: • Bubble Column Fermenter: • Fluidized Bed Bioreactors: • Packed Bed Bioreactors: 14.

Which type of fermenter is used mainly for mixing?

Which type of fermenter is used mainly for mixing? Explanation: Mixing is usually carried out in a stirred tank; Stirred tanks are usually cylindrical in shape.

What is the purpose of agitator?

Traditional agitators are tall spindles, vaned or finned, in the center of the wash basket that twist (or agitate) back and forth, rubbing against clothes to help break down loose soils. Impellers, on the other hand, are low-profile cones or discs that spin/rotate to rub clothes against each other to get them clean.

Why do you need impellers in a fermentor?

Impellers also helps in breaking foam bubbles in the head space of fermentor. This foam formed during fermentation process can cause contamination problem and this problem is avoided by the use of impellers. 3. Baffles Baffles are mounted on the walls of a fermentor.

Which is an agitating device in the fermenter?

The impeller (also called agitator) is an agitating device necessary for stirring of the fermenter. (ii) It mixes the microbial cells through the liquid culture medium.

How does air enter the fermentor in a bioreactor?

The air enters the fermentor as a series of tiny bubbles from which the oxygen passes by diffusion into the liquid culture medium. The impeller (also called agitator) is an agitating device necessary for stirring of the fermenter. (ii) It mixes the microbial cells through the liquid culture medium.

What’s the difference between a stirrer and an impeller?

Impeller shaft: Holds the agitator centrally. Impeller: Acts as an agitating device for mixing up the nutrients and microorganisms uniformly. Stirrer: Mixes the gas bubbles throughout the liquid culture medium. Baffle: Prevents the counterflow or vortex formation by breaking down the gas bubbles to improve aeration efficiency.