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An industrial waste water treatment plant discharges into a large river. the industrial waste water is at 1m^3/s and contains an ultimate BOD concentration of 300mg/L at a temperature of 30 degrees C and a DO concentration of 2.5mg/L. the velocity of the river is 1.5m/s. Upstream of the point of discharge, the river has a temperture of 11 degrees Celcius, an ultimate BOD of 22mg/L, a DO concentration of 10mg/L and a flow rate of 4m^#/s. the deoxygenation rate and the reoxygenation rate coefficients are 0.15d^-1 and 0.5d^-1 at 20 degrees Celcius respectively.
Find:a) Temperature of the water at the discharge point.
B)dissolved-oxygen concentration at the point of discharge.
C)Dissolved-oxygen deficit at the point of discharge.
D) ultimate BOD at the point of discharge.
What is the largest circle that can be inscribed within a polygon with corner coordinates (600,800), (900, 300), (500, 100), and (100, 40) Find the radius of the largest circle and show how you found it from these coordinates.
A stream with a flow of 22 mgd contains 180 mg/L of sodium cyanide in the form of NaCN. Chlorine can be added to destroy the NaCN waste according to the reaction shown below. Find the theoretical minimum amount of chlorine required (in lb/day).
Suppose you are a member of an EPA enforcement team investigating the possible dumping of arsenic into Arbor Lake. You take water samples from the middle of the lake and find that the concentration is 90.0 ppb.
Determine the compositions and quantities of gas and liquid when 1 lb mole of a mixture of 30 mole percent methane and 70 mole percent ethanol is brought to equilibrium at 0 F and 500 psia.
If the farmer irrigates continuously, what will be the steady state concentration of selenium in the stream downstream from the farm (after the irrigation run-off returns to the stream)?
Consider some hypothetical X+ - Y - ion pair for which the equilibrium interionic spacing and bonding energy values are 0.38 nm and - 6.38 eV respectively. If it is known that n in the equation has a value of 10
A 100 ft steel tape known to be only 99.97ft long (understandard conditions) was used to record a measurem,ent of 215.63ft. What is the distance corrected for the erroneous tapelength
Deteemine the velocity of the 30 kg block A if the two blocks are released from rest and the 20 kg block B Moves 0.6 mup the incline .The coefficient of kinetic friction between both blocks and the inclined planes is 0.10
Determine if the bridge would fail under a given load. The truck has two axles and the graph should should begin with 1 axle 7 ft into bridge with the other just reaching the bridge.
The local engineer concludes that, since the oil must have been destroyed by the soil microorganisms at a rate of 20 mg/kg each year, in one more year the site will be free of all contamination. a. Is this a good assumption
The truss is to be constructed of members with equal cross-sectional areas and using a material with yield stress 700 MPa. The structure must be designed to support a mass (m) of 3400 kg with a factor of safety of 3.
Water flows at 8 m^3/s through a rectangular channel 4 m wide and 3 m deep. If the velocity is 1 m/s, calculate the flow depth in the channel. If this channel expands downstream to a width of 5m and the depth decreases by 0.5m from the upstream de..
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