Question

Which type of fermentation is preferred in bench top fermenter?

(a) Batch

(b) Fed-batch

(c) Continuous

(d) Dual or multiple-fermentation

I got this question in an interview for job.

The query is from Steps in Bioprocess Development : A Typical New Product from Recombinant DNA in section Bioprocess Development of Bioprocess Engineering

Answer 1

Correct answer is (b) Fed-batch

For explanation: Fed-batch fermentation is superior to conventional batch fermentation when controlling concentrations of a nutrient (or nutrients) affect the yield or productivity of the desired metabolite. The advantage of the fed-batch fermentation is that one can control concentration of fed-substrate in the culture liquid at arbitrarily desired levels.