Case1ExamOct42005finalversion - APSC150...

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APSC 150 Biological Engineering 4 October 2005 Please answer all nine questions. Questions 1-5 are worth 4 marks each. For questions 1-5, there may be more than 1 answer that is true, treat each subsection (for example 1a, 1b, 1c and 1d) as a separate true/false question. Mark each as true/false, or circle the answers that you consider to be true. Uncircled answers will be considered the same as labeling the statement “false”. 1. Reaction kinetics: a) are always described as first order. b) can be determined by writing a balanced chemical equation for oxidation of a compound. c) have a direct effect on the size of a reactor required to do a biological transformation. d) is a term used often but nobody really understands exactly what it means. 2. Which of the following is true: a) To get growth rate from substrate uptake rate, you need to multiply by the yield coefficient. b) Reaction conditions for biological reactions are typically milder (less extreme) than those for chemical reactions. c) A biotechnological process, like fermentation to produce ethanol, would use a single organism in pure culture. d) Natural bodies of water a re-aerated several ways, including by aquatic plants and algae. 3. Aerated lagoons: a) would be considerably larger in volume than an activated sludge reactor designed to do the same job. b) usually have a low concentration of biomass in the treated effluent stream because of their secondary clarifier. c) are uncommon in industry because of they cannot remove as much BOD as an activated sludge reactor. d) require oxygen which is often supplied using mechanical surface aerators. 4. Which of the following is true: a) Sub-cellular organelles and a nuclear membrane would be found in most procaryots. b) HRT and MCRT will be the same for a completely mixed lagoon. c)
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Case1ExamOct42005finalversion - APSC150...

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