EBK BUSINESS DRIVEN INFORMATION SYSTEMS
EBK BUSINESS DRIVEN INFORMATION SYSTEMS
6th Edition
ISBN: 8220106796986
Author: BALTZAN
Publisher: YUZU
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Chapter 2, Problem 17RQ
To determine

To Explain:

How finding different ways to travel the same road relates to automation, streamlining, and business process re-engineering.

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Average sludge production reported by members of the National Association of Clean Water Agencies is 0.7 tons of sludge TS per MG wastewater treated. Assume that the organic matter (VS) in the sludge contains 10% N and that the ratio of VS/TS in sludge is 0.85. A) How many mg/L of N are removed from the wastewater due to assimilation? B) If the raw wastewater contained 50 mg/L total N, what percent was removed via assimilation? C) Why is this a disappointing result in terms of nutrient recovery and reuse goals?
Temperature EXAMPLE 1: A diesel engine is fitted with a turbocharger, which comprises a radial compressor driven by a radial exhaust gas turbine. The air is drawn into the compressor at a pressure of 0.95 bar and at a temperature of 15°C, and is delivered to the engine at a pressure of 2.0 bar. The engine is operating on a gravimetric air/fuel ratio of 18: 1, and the exhaust leaves the engine at a temperature of 600°C and at a pressure of 1.8 bar; the turbine exhausts at 1.05 bar. The isentropic efficiencies of the compressor and T(K) turbine are 70 per cent and 80 per cent, respectively. Calculate (i) the temperature of the air leaving the compressor (ii) the temperature of the gases leaving the turbine (iii) the mechanical power loss in the turbocharger expressed as a percentage of the power generated in the turbine. Using the values of : Cpair = 1.01 kJ/kg K, Vair = 1.4 Cpex = 1.15 kJ/kg K, Yex = 1.33 and 2s с P2 Engine P3 W W₁ = mexpex (T3-TA) At W₁ = mair Cpex (T2-T₁) 4 P4…
The two-part curve is from a BOD bottle test conducted over 50 days (i.e., ultimate UBOD). The nitrifying bacteria numbers grew to significance by Day-8.There is a lower cBOD curve and an upper nBOD curve. BOD₁ = UBOD (1− e−k₁t) A) What is the rate constants k for cBOD? B) What is the rate constants k for nBOD? C) Why aren't nitrifiers prevalent in the raw wastewater? Treatment ponds have long hydraulic residence times (HRTs), so nitrifiers are a significant part of the microbiome. D) Sketch a 50-d BOD curve similar to the above, but for a pond effluent sample. The sum of the c and n BODs at 50 days is 30 mg/L. E) Why does your curve have the shape you give it? 100 80 BOD, mg/L 60 60 40 40 20 20 0 0 10 20 30 40 40 Time, d 50 60
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