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1. Estimate the particle removal efficiency in a rectangular sedimentation tank with a depth of 4 m, width of 8 m, length of 40 m and process flow rate of 800 m3/h. For the following influent particle settling characteristics compute the overall removal efficiency. Plot the influent and effluent particle concentrations as a function of particle size using histogram. One way to increase the particle removal efficiency is to decrease the overflow rate. How do you propose to do this at the above treatment plant? If the overflow rate is reduced to 2.0 and 1.5 m/h, what are the corresponding particle removal efficiencies?
2. a. As filter bed collects impurities, the increase in the lead loss is directly proportional to the amount of impurities collected. With a uniform quality of feed water, the head loss, hL in a filter can be written as:
hL =Vs(a+bV)
where,
Vs - approach velocity of the water (m/s)
V - volume of water filtered through unit area of filter bed since the last backwash (m3/m2)
a, b- constants depending on the size and shape of the filter material and the quality of the applied water; units of and b are s and s/m A filter has a head loss of 0.3 m when newly washed, and 1.3 m after 24 hours. When operating at a rate of 1.5 L/s.m2. Estimate the head loss both immediately after backwash and 10 hours later, if the same water is applied at a rate of 2 L/s.m2.
Write an essay on the topic "application of geophysical techniques using electromagnetic induction as a tool for sustainable soil and water management of agricultural fields in the humid tropic Caribbean. components:
The brush is immersed in the first volume and agitated until equilibrium is established, removed and the exercise is repeated with the second volume. Assume that the solvent remaining in the brush after it is removed from the first batch is insign..
A falling-head permeability test was carried out on a clay soil of diameter 100 mm and length 150 mm. In 4 minutes the head in the standpipe of diameter 5mm dropped from 680 to 350 mm.
The condenser in a refrigerator receives R-134a at 700 kPa and 50C, and it exits as saturated liquid at 25 C, The flow rate is 0.1 kg/s,and the condenser has air in at an ambient temperature of 15 C and leaving at 35 C. Find the minimum flow rate ..
Calculate the numbers of married men, single men, married women and single women. Print these numbers on a student summary report. If any single men are over 30 years of age, print their names and ages on a separate eligible bachelors report.
The machine part ABC is supported by a frictionless hinge at B and a wedge at C. Knowing that the coefficient of static friction is 0.20 at both surfaces of the wedge, determine:
The reaction between 2-methyl-2-pentanol and HBr to yield 2-methyl-2-pentene is probably: A) an E1-type reaction involving the protonated alcohol as the substrate. B) an SN2-type reaction involving the protonated alcohol as the substrate.
Working a problem where there are two one-story buildings of different heights next to each other. Earthquake imparts a base motion z(t) that is a cosine function. I'm given a shape function for a column of height L when deriving the EOM for each ..
What is the maximum safe speed around the curve? If the speed limit on the roadway is 60mph, what action should be taken by the engineer?
Many years ago, well-known architect Frank Lloyd Wright designed a mile-high skyscraper, which has never been built.
To remove a nail, a small block of wood is placed under a crowbar, and a horizontal force P is applied as shown. Knowing that the maximum vertical force needed to extract the nail is 2600 N and that the horizontal force P is not to exceed 290 N, d..
It is required to dewater a construction site 80 m by 80 m. The bottom of the construction will be 1.5 m below the initial water surface elevation of 90 m.
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