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Imagine we have a ‘reset' button for civilization. Assume the city where you currently live in is starting afresh with 5,000 new settlers moving into the area. The population growth is estimated to be 10% on average in the first 10 years and then declines and stabilizes at 5% in Year 15. Modern drinking water supply needs to be installed. You are now contesting to be the chief engineer to lead the designing project for this water treatment plant. You are required to do the following tasks to demonstrate your knowledge and engineering skills:
1. State the principles you apply in your designs; (10%)
2. Enlist all the assumptions; (15%)
3. Estimate the required plant treatment capacity for the next 20 years; (15%)
4. Lay out the flow sheet of the process and justify your choice based on the characteristics of the source water (note: if data not available, you can make your estimations based on other similar sites or commensense); (20%)
5. Estimate the key parameters in the water treatment process including daily flow rate, detention time, geometry and dimension of the sedimentation tank, how many filters and frequency of backwashing if filtration is required, the required amount of chlorine if chlorination is the chosen. (40%)
question 1a with the help of a labeled drawing discriminate between the first-stage biochemical oxygen demand bod and
a super tanker is 360m long and has a width of 70m and draft of 25m. assuming that the drag is mainly due to the skin friction at the bottom and side faces and that the boundary layer develops naturally,
Devise a control system for the distillation column described in Chapter 17, Example 17.2. The flow to the column comes from a storage tank. The product, acetone, is sent to storage and the waste to an effluent pond. It is essential that the speci..
A liquid containing 60 mol% toluene and 40 mol% benzene is continuously distilled in a single-equilibrium-stage unit at atmospheric pressure. What percent of benzene in the feed leaves in the vapor if 90% of the toluene entering in the feed leaves..
The diagrams above show four Bode plots of uncompensated and compensated performance for a particular control system. Which diagram shows the effects of adding phase-lag compensation?
The left side of of the mechanical energy equation has three terms: P/p, (1/2)av^2 and gz. show that each of these terms has the dimension of energy per mass of fluid by....a) converting each term to units of Btu/lbm beginning with pressure in psi, d..
Application of reverse osmosis principles for the desalination of sea water
Use Laplace transformation to solve the initial value problem
Using the mole balance equation only, a relationship between conversion in the reactor and the reactor temperature can be obtained. This relationship is shown in the following figure as a plot of XMB versus reactor temperature.
1. In this problem, you learn how to apply the energy balance to a closed system containing an ideal gas with constant Cpfor 3 different processes.
The following two reactions take place in a gas phase reactor at 3000 K and 1 atmosphere pressure: 2CO2(g) 2CO(g) + O2(g) Keq.1071 O2(g) + N2(g) 2NO(g) Keq.01493
Estimate the concentration of the substrate at the surface of the immobilized enzyme
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