What are advantages of the study on microbial growth and pro

Solution

MICROBIAL GROWTH

THUS THE ADVANTAGE OF THE STUDY OF MICROBIAL GROWTH IS THAT

PRODUCT PRODUCTION PHASES & KINETICS

Now if we isolate bacteria or microbes and culture in petridish then we may visualize certain growth phases of bacteria viz :

After completion of lag phase cell enters the log phase. If the starting cell number is N0 then

Thus number of cells after given time = Nt=N0 x 2^n ;where n is the number of generations

The term doubling time refers to the time taken to double the biomass. The specific growth rate constant ( µ), is the measure of rate of growth of organism. If N is the number of cells at a given time, then growth rate is given by the formula:

dN/dt = µN

If X is the biomass concentration at a given time, then growth rate with time is given by.

dX/dt = µX

In general, the specific growth rate is a function of the

Their relationship was expressed by Monond by the following equation:

µ = µmax . S/ (Ks + S)

Both S and Ks are expressed as concentrations

In batch culture, the substrate is initially at a higher concentration thus the above equation is approximately 1.

S/ (Ks + S) = 1

Thus, µ = µmax.

When the substrate concentration is low, as usually occurs at the end of growth phase, then,

S/ Ks + S < 1

Hence µ < µmax.

THUS :

THE ADVANTAGE OF STUDY OF PRODUCT PRODUCTION PHASES IS THAT

ADVANTAGE OF STUDYING KINETICS ARE: