A specific enzyme acts as catalyst in the fermentation of reactant A. At a given enzyme concentration in the aqueous feed stream (25 liter/min) find the volume of the plug flow reactor needed for 95% conversion of reactant A (CA0 =2 mol/liter). The kinetics of the fementation at this enzyme concentration is given by A----------> R     -rA=[0.1CA/(1+0.5CA)] mol/liter.min

Air oxygen (A) dissolves in a shallow stagnant pond and is consumed bymicroorganisms. The rate of the consumption can be approximated by a first order reaction,i.e. rA = −kCA, where k is the reaction rate constant in 1/time and CA is the oxygenconcentration in mol/volume. The pond can be considered dilute in oxygen content due to thelow solubility of oxygen in water (B). The diffusion coefficient of oxygen in water is DAB.Oxygen concentration at the pond surface, CAo, is known. The depth and surface area of thepond are L and S, respectively.a. Derive a relation for the steady state oxygen concentration distribution in the pond.b. Obtain steady state oxygen consumption rate in the pond.

More Gr 1.0mm 1- A bioreactor is a vessal in which biological Conversion. is carried out involving enzymes, microorganisms, and/or animal and plant Cells. In the anaerobic fermentation of grain, the yeast Saccharomy Ces Cerevisiae digests. glucose (C6H12 06) from plants to form the products. ethanol (Cz Hs oH) and profenoic acid (C₂ H₂ Co₂ H) by the following reactions = - Reaction / C6H₁2O6 2 C₂ H₂H + 2 Co₂ 12 Reaction 2: C6H12O62 C ₂ H 3 Co₂ H + 2 H ₂0 In a batch process, of a tank is charged with nooo kg 12% solution of glucose in water. After fermentation, 120 kg of. Co₂ are produced and go.kg of unreacted glucose remains in the broth, what are the weight (mass) Percents of ethanol and Pro Penoic acid in the broth at the end of the fermentation process ? Assume that none of the glucose is assimilated into the bacteria.

Chemical engineering

3.15. At room temperature sucrose is hydrolyzed by the catalytic action of the enzyme sucrase as follows: sucrase sucrose products Starting with a sucrose concentration CA0 = 1.0 millimol/liter and an en- zyme concentration CEo = 0.01 millimol/liter, the following kinetic data are obtained in a batch reactor (concentrations calculated from optical rotation measurements): CA, millimol/liter t, hr 0.84 0.68 0.53 0.38 0.27 0.16 0.09 0.04 0.018 0.006 0.0025 4 5 6 7 9 10 2 3 8 11 Determine whether these data can be reasonably fitted by a kinetic equation of the Michaelis-Menten type, or k¿CĄCE0 CA + CM -TA = where CM = Michaelis constant If the fit is reasonable, evaluate the constants k, and Cm. Solve by the integral method. 3.16. Repeat the above problem, except this time solve by the differential method.

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What is osmosis? What is osmotic pressure? Match the items in the left column to the appropriate blanks in the sentences on the right. higher P=nRT/V solvent II-MRT start solute Psolation Xsolvent Polvent semipermeable stop lower reverse cell Osmosis is defined as the flow of solute concentration to one of pressure is the pressure required to equation from a solution of Reset Help through a solute concentration. membrane. The osmotic the osmotic flow and is given by the following

Acetobacter Aceti bacteria converts ethanol to acetic acid and water under aerobic conditions.  C2H5OH + O2 --> CH3COOH + H2O.  A continuous fermentation process is proposed for the production of acetic acid using A. aceti cells immobilized on the surface of gelatin beads. The reactor is fed on a continuous basis a mixture of ethanol and water and the ethanol in the feed is consumed completely by the fermentation reaction. The flow rate of the effluent (outlet) liquid stream is 20 kgmol/h, and this stream contains 10 mol% acetic acid (the balance being water). The reactor is also being fed on a continuous basis with dry air (79 mol% N2 and 21 mol% O2) at a rate of 20 kgmol/h and the effluent gas stream is in equilibrium with the effluent liquid. The reactor operates at atmospheric pressure. The vapor pressure of water and acetic acid at the reaction temperature are 20 and 15 mm Hg respectively. What is the flow rate of the ethanol-water feed mixture and its composition? What is the…

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A scientist from UAE Space Agency invented a new material called Betoxide (B,H,0) which is produced by the catalytic reaction of Beto (B2H4) 2 C2H4 + 02 2 C2H20 (Desired reaction) An unwanted competing reaction is the combustion of Beto B2H4 + 302 2B02 + 2H20 (Undesired reaction) a. The reactor feed consist of 400 moles of Beto and 100 moles of oxygen. Calculate the composition of the reactor outlet for 20% conversion of Beto if only the desired reaction takes place. b. When both desired and undesired reactions take place, estimate the reactor composition.