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

Stress corrosion of pre-stressing steel, Stress corrosion of pre-stressing ...

Stress corrosion of pre-stressing steel Stress corrosion is crystalline cracking of metals under tensile stresses in the presence of corrosive agents. Conditions for stress cor

Overhanging beams, Do we take the whole length (including the over hanging ...

Do we take the whole length (including the over hanging portion when we say the "whole span" of th beam ?

Timber, Cross-section of exogeneous tree

Cross-section of exogeneous tree

Determine the total lateral pressure on the wall, A masonry retaining wall ...

A masonry retaining wall is 1.5 m wide at the top, 3.5 m wide at the base and 6 m high. It is trapezoidal in section and has a vertical face on the earth side. The backfill is leve

Obstacle measurement.., ..describe how u can obtain the length of an inacce...

..describe how u can obtain the length of an inacceble length of a land when a river cross it

Find the cumulative distribution function, Find the Cumulative Distribution...

Find the Cumulative Distribution Function: Find the cdf of Y = Z 2 where Z - N (0,l) Solution: F(y)= P(Y ≤ y) = p(z 2 ≤y) = P(-√y≤ √z≤√y) = ?(√y)- ?(-√y) = ?(√y)

Bituminous Macadam, What is the difference between Dense bituminous Macadam...

What is the difference between Dense bituminous Macadam and bituminous macadam

Manufacturing technique of ferro cement, what are the manufacturing techniq...

what are the manufacturing techniques of ferro cement?

Construction, #questidisadvantage of steelon..

#questidisadvantage of steelon..

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