Determine the concentration of ubod in the effluent

Assignment Help Civil Engineering

Reference no: EM13562643

The concentration of UBOD in a river entering the first of two lakes that are connected in a series is equal to 20m/L. If the first-order BOD reaction rate constant (K) equals 0.35 d^-1 and complete mixing occurs in each lake, what is the concentration of UBOD at the outlet of each lake? The flow in the river is equal to 4000 m^3/d and the volume of the first and second lake is 20,000 and 12,000 m^3, respectively. Assume steady-state conditions.

Part B- If the length of the river connection between the two lakes is equal to 3km and the velocity in the river is equal to 0.4 m/s, determine the concentration of UBOD in the effluent from the second lake.

Reference no: EM13562643

Questions Cloud

Channel is designed to carry a discharge : A 10-feet trapezoidal channel is designed to carry a discharge of 1,000cfs with side slopes: Z1 = 4 and Z2 = 5. The channel bed slope is 0.04 ff/ft and has Manning's N of 0.03. To protect the channel from erosion

Obtain the change in the entropy of the water : A freezer is used to freeze 3.0 Lof water completely into ice. The water and the freezer remain at aconstant temperature of T = 0°C. Determine the change in the entropy of the water

Determine the weight of the satellite in pounds when it : A satellite would have a mass of 200 kg on the surface of the moon. Determine the weight of the satellite in pounds when it is in orbit 10,000 mi. above the surface of the earth.

Determine how fast does the spot of laser light sweep : A turntable that turns 10 revolutions each second is locatedon top of a mountain. how fast does the spot of laser light sweep across cloudsthat are twice as far away

Determine the concentration of ubod in the effluent : If the length of the river connection between the two lakes is equal to 3km and the velocity in the river is equal to 0.4 m/s, determine the concentration of UBOD in the effluent from the second lake.

Calculate the angles most probable value : An angle is observed repeatedly using the same equipment and procedures. Calculate a) the angle's most probable value, b) the standard deviation, and c) the standard devaition of the mean

Determine how many years from now the consumption will reach : A community has a current population of 15,000. 10 years ago, the population was 12,500 and the community has a declining growth rate with a saturation population of 22,000. The total water consumption for the community at present is 2.25 million gal..

Graph the pressure and piezometric head in the tank as : Water flowing through 80 feet of 4-inch-diameter average cast iron pipe (ks=0.00085 feet) causes a friction head loss of 0.27 feet. Find the flow rate. Assuming viscosity v=1.079*10^-5 ft^2/s

Find at what speed is this galaxy reading from earth : The spectral lines of various elements are detected from agalaxy in constellation ursa major. At what speed is this galaxy reading from earth

User Account

All Pages