Lecture 1 Flashcards
Involves the application of chemical and process engineering principles to study the kinetics of bioreactions, the design ofbioreactors and the recovery and purification of bioproducts
Biochemical engineering
used in the chemical industry (lactic acid, acetic acid, ethanol, etc.), foods industry (yogurt, beer, etc.), pharmaceutical industry (vaccines, antibiotics, etc.) and even the gas and oil sector (biocatalysis in oil refining, biodesulfurisation, etc).
reactions involving living cells or cellular component
bioreactions
concerns with the speed or velocity of reactions
reaction kinetics
aA + bB + cC + … → eE + fF + gG +…
the rate of reaction can be expressed as
r = -1/a d[A]/dt = 1/e d[E]/dt
expression of the rate of reaction as a function of the concentrations of the species present in the chemical equation
rate law
depends on the temperature
rate constant
sum of the exponents of its concentration terms
reaction order
chemical reaction where the rate does not vary with the increase/decrease in the concentration of the reactants
zero order reaction
Zero order reaction equation
[A] = [A]0 - kt
Reactants decrease linearly with time
Products increase linearly with time
zero order reaction
First order reaction equation
[A] = [A]0e^-kt
reaction that proceeds at a rate that depends linearly on only one reactant concentration
first order reaction
reactants decrease exponentially with time
straight line is obtained when ln[A] is plotted against t. The slope gives -k
first order reactions
half life for first order reactions
t1/2 = ln 2/k
