Oct2005BioCaseexamanswers

Oct2005BioCaseexamanswers - APSC 150 Biological Engineering...

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Unformatted text preview: APSC 150 Biological Engineering 1. Reaction kinetics: a) are always described as first order. False b) can be determined by writing a balanced chemical equation for oxidation of a compound. False c) have a direct effect on the size of a reactor required to do a biological transformation. True d) is a term used often but nobody really understands exactly what it means. False or True (Bonus markjoke question) 2. Which of the following is true: a) To get growth rate from substrate uptake rate, you need to multiply by the yield coefficient. True b) A vorticella is a eucaryote. True c) A biotechnological process, like fermentation to produce ethanol, would use a single species of organism in pure culture. True d) Natural bodies of water are re-aerated several ways, including by aquatic plants and algae. True 3. Aerated lagoons: a) would be considerably larger in volume than an activated sludge reactor designed to do the same job. True b) usually have a low concentration of biomass in the treated effluent stream because of their secondary clarifier. False c) are uncommon in industry because they cannot remove as much BOD as an activated sludge reactor. False d) require oxygen which is often supplied using mechanical surface aerators. True 4. Which of the following is true: a) Subcellular organelles and a nuclear membrane would be found in most procaryots. False b) HRT and MCRT will be equal for a completely mixed lagoon . True c) Eucaryotes are responsible for most of the BOD removal in activated sludge reactors. False d) In a material balance, the accumulation term can be negative. True 5. Activated sludge reactors: a) are called activated because they give better BOD removal than lagoons. are called activated because they give better BOD removal than lagoons....
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Oct2005BioCaseexamanswers - APSC 150 Biological Engineering...

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