In an activated sludge process, the biomass is recycled to

#Question id: 14332

#Section 5: Bioprocess Engineering and Process Biotechnology

To ensure turbulent conditions and minimum mixing time during agitation with a turbine impeller, the Reynolds number must be at least 10⁴. A stirred laboratory-scale fermenter with a turbine impeller 5 cm in diameter is operated at 800 rpm. If the density of broth being stirred is close to that of water. The mixing system is scaled up so the tank and impeller are 15 times the diameter of the laboratory equipment. The stirrer in the large vessel is operated so that the stirrer tip speed (tip speed = π N i D i) is the same as in the laboratory apparatus. How does scale-up affect the maximum viscosity. 

#Question id: 3342

#Section 3: Genetics, Cellular and Molecular Biology

Neutral alleles are those that do not alter fitness and average reproductive success does not differ between individuals that carry one neutral allele or the other. The frequencies of these neutral alleles may change in a population by

#Question id: 27059

#Section 4: Fundamentals of Biological Engineering

What is the heat of reaction if the heat of combustion of products is 10 J and heat of combustion of reactants is 5 J?

#Question id: 27474

#Section 5: Bioprocess Engineering and Process Biotechnology

When NDa <<1, the overall reaction is controlled by

#Question id: 12993

#Section 2: General Biology