Question

The reactors in which all of the product is removed after fixed time is referred to as ___________

(a) packed bed reactors

(b) batch membrane reactors

(c) stirred tank batch reactors

(d) fluidized bed reactors

I had been asked this question during an internship interview.

My query is from Immobilized Enzymes in portion Immobilized Enzymes and their Uses of Enzyme Technology

Answer 1

Right option is (c) stirred tank batch reactors

Easy explanation: The reactors in which all of the product is removed after fixed time is referred to as stirred tank batch reactors (STRs). It consists of a tank containing a stirrer. In STRs, enzymes and substrates have identical residence times within the reactor. Packed bed reactors are those in which there is tank containing a settled bed of immobilised enzyme particles. Batch membrane reactor are those in which the enzyme is held within membrane tubes which allow the substrate to diffuse in and the product to diffuse out. Fluidized bed reactor (FBR) is one where in the flow of gas and/or substrate keeps the immobilised enzyme particles in a fluidized state.