A fermentation slurry containing Streptomyces kanamyceticus cells is filtered using a continuous rotary vacuum filter. 120 kg h^{- 1} slurry is fed to the filter; 1 kg slurry contains 60 g cell solids. To improve filtration rates, particles of diatomaceous-earth filter aid are added at a rate of 10 kg h^{- 1}. The concentration of kanamycin in the slurry is 0.05% by weight. Liquid filtrate is collected at a rate of 112 kg h^-1; the concentration of kanamycin in the filtrate is 0.045% (w/w). Filter cake containing cells and filter aid is continuously removed from the filter cloth.

If the concentration of kanamycin in the filter-cake liquid is the same as in the filtrate, how much kanamycin is absorbed per kg filter aid?.,..... 10^-4

TLS Online TPP Program

#Question id: 21731

#Section 5: Bioprocess Engineering and Process Biotechnology

The smog constituent peroxyacetyl nitrate (PAN) dissociates into peroxyacetyl radicals and NO2(g) in a first order reaction with a half-life of 32 min. 

If the initial concentration of PAN in an air sample is 2.7×10¹⁵ molecules/L, what will be the concentration 2.24 h later?

TLS Online TPP Program

#Question id: 21732

#Section 5: Bioprocess Engineering and Process Biotechnology

Rate constants for the first-order decomposition of acetonedicarboxylic acid

CO(CH2COOH)2(aq) → CO(CH3)2(aq) + 2 CO2(g)

are k = 4.75 ×10^–4 s^–1 at 293 K and k = 1.63 ×10^–3 at 303 K. What is the activation energy, Ea, for this reaction?

TLS Online TPP Program

#Question id: 21733

#Section 5: Bioprocess Engineering and Process Biotechnology

A rate law __________.

TLS Online TPP Program

#Question id: 21734

#Section 5: Bioprocess Engineering and Process Biotechnology

Consider the following balanced equation.

Al₂O₃+6NaOH+12HF=2Na₃AlF₆+9H2O

The rate law for this reaction is rate=k[Al₂O₃]²[NaOH].

What is the rate constant for this reaction if the reaction proceeds at an initial rate of 0.005Ms when all of the reactants have initial concentrations of 0.02M?

TLS Online TPP Program

#Question id: 21735

#Section 5: Bioprocess Engineering and Process Biotechnology

Given the following equation (2A+B  3C). Which of the following correctly displays the rate of the reaction?

I. -Δ[A]/2Δt

II. Δ[B]/Δt

III. Δ[C]/3Δt

TLS Online TPP Program

#Question id: 21736

#Section 5: Bioprocess Engineering and Process Biotechnology

Which of the following is a classic example of a first-order reaction?