Environmental Question, Civil Engineering

Assignment Help:
An activated sludge tank treats 1 MGD from the primary clarify and has an X of
2200 ppm SS. The water euent is 0.9 MGD. 1.0 MGD of the sludge is recycled back into the tank
and has an [SS] of 3980 ppm. The concentration of the BOD exiting the primary clarier is 200
ppm.
(a) What are Qw and Xw?
(b) What are Qc and Xc?
(c) What are Q1 and X1?
(d) What is Xe? (Answer = 24.4 ppm)
(e) Calculate the volume of the tank that will satisfy the following requirements:
(e-1) BOD loading < 35 lb BOD/1000 ft3day
(e-2) Sludge age > 5 days
(e-3) Aeration period > 4 hr

Related Discussions:- Environmental Question

Road binders - bitumen, Road Binders: Bitumen: Bitumen is a viscous, s...

Road Binders: Bitumen: Bitumen is a viscous, semi-solid material, dark in color, having adhesive properties, and derived from the distillation of petroleum crude in a refinery

What is the absolute pressure scale, Absolute pressure is measured from a v...

Absolute pressure is measured from a vacuum (0 PSI) and atmospheric pressure is14.7PSIa or 14.7 PSI above a vacuum 1PSI on a tire pressure gauge is known as 1PSIg = 15.7PSIa 10PSIg

Systems approach to diagnose and solve the chronic w, systems approach to d...

systems approach to diagnose and solve the chronic water crisis in the city.

Determine the size and number of aeration basins, Determine the Size and Nu...

Determine the Size and Number of Aeration Basins? For a community of 100,000, determine the size and number of aeration basins in a municipal activated sludge treatment facilit

Joints in concrete carriageway, Question Is it necessary joints of conc...

Question Is it necessary joints of concrete kerbs be in line with joints in concrete carriageway ? Answer In regular practice, joints are provided in road kerbs to ca

Static, Determine the moment of inertia with respect to the x axis for the ...

Determine the moment of inertia with respect to the x axis for the shaded area shown (Figure 2) . The dimension is a = 2.00m .

Explain the well drawdown equations - ground water, Explain the Well Drawdo...

Explain the Well Drawdown Equations Watch the units, especially if you use log 10 or ln.    h 1 = aquifer thickness minus the drawdown (ft)  r 1 = distance from well (ft

Foundation, Explain briefly shallow foundation?

Explain briefly shallow foundation?

Determine the void-ratio and shrinkage limit, An oven-dry soil sample of vo...

An oven-dry soil sample of volume 225 cm3 weighs 3.90 N. If the grain specific gravity is 2.72, determine the void-ratio and shrinkage limit. What will be the water content which w

Write Your Message!

Captcha
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