Determine temperature of the combined wastewater and stream

Assignment Help Civil Engineering
Reference no: EM13305269

A municipal WWTP discharges 22.5 MGD of secondary effluent containing 45 mg/L of ultimate BOD at 26.7 oC with 1.3 mg/L of dissolved oxygen. The stream flow is 237 ft3/s at a velocity of 2.1 ft/s and an average depth of 7 ft. The temperature of the stream before the wastewater enters is 16 oC. The stream is 80% saturation with oxygen and has an ultimate BOD of 2.3 mg/L. The reaeration (kr) and deoxygenation (kD) rate coefficients are 0.35 d-1 and 0.2 d-1, respectively at 20 oC. The Arrhenius temperature correction coefficients are f = 1.024 for kr and h = 1.056 for kD.

Determine the following: 1. The wastewater flow rate in ft3/s

2. The temperature of the combined wastewater and stream

3. The DO concentration of the mixture of wastewater and stream

4. The DO deficit of the mixture of wastewater and stream (will need to use linear interpolation of DO values.

5.The ultimate BOD concentration of the mixture of wastewater and stream

6. The distance downstream (xc) to the point of minimum DO concentration and

7. The minimum DO concentration in the stream

Reference no: EM13305269

Determine the work per unit mass delivered to the turbine

Air at the turbine inlet is at 700 kPa and 25 degree C. The turbine discharges air in to the atmosphere at a temperature of 11 degree C. Inlet and outlet air velocities are

Determine the pressures and volumes at points a-b-c and d

A 1.00 mol sample of an ideal gas (gamma = 1.40) is carried through the Carnot cycle. At point A, the pressure is 25.0 atm and the temperature is 600 K. At point C, the pres

Find exit area of the nozzle and overall nozzle efficiency

The flow from the nozzle entrance to the throat is reversible and adiabatic. Determine the exit area of the nozzle, the overall nozzle efficiency, and the entropy generation

Calculate the runout length with an allowable stress

An 80-mil (2 mm) HDPE geomembrane with an allowable stress of 1,300 lb/in2 rests on a 3(H):1(V) side slope. A 18-inch thick cover soil with a unit weight of 110 lb/in3 (also

Find the combined specific turbine work

Consider the supercritical cycle in Problem 9.30 and assume that the turbine first expands to 3 MPa, followed by a reheat to 500?C, with a further expansion in the low-press

What uniform annual series of cash flows over 12-year period

What uniform annual series of cash flows over a 12-year period is equivalent to an investment of $5,000 at t= 0, followed by receipts of $600 per year for 11 years and a fin

Calculate low point of curve if the intersection at station

A vertical parabolic curve is to be used as a sag curve, and it is desired to know the location and elevation of the low point. The curve is 750ft long , and the minus grade

Determine aerodynamic drag on the full-scale prototyple car

The aerodynamic drag of a new sports car is to be predicted at a speed of 50mph at an air temperature of 25 degrees Celcius. Automotive engineers build a one-fifth scale mod

Reviews

Write a Review

 
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd