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

Scheming thermal reinforcement, Question What is importance of critical...

Question What is importance of critical steel ratio in scheming thermal reinforcement ? Answer Execution of critical steel ratio resources that in construction joints,

Compute the included angles, Example. With a surveyor compass the ang...

Example. With a surveyor compass the angles observed in traversing the lines AB, BC, CD, DE and EF are  as. Compute the included angles and indicate them in a neat sketch.

Rock reinforcement – how it works, Rock reinforcement - how it works? ...

Rock reinforcement - how it works? For rocks with widespread fractures, individual blocks resulting from these fractures can fall out and as a result slope failure can take pl

Principle of adding cooling pipes, Question What is key principle of a...

Question What is key principle of adding cooling pipes or yet using cold water for concrete in concreting operation? Answer These methods aim at reducing placing tem

What do you mean by guide bunds, Q. What do you mean by Guide bunds? Gu...

Q. What do you mean by Guide bunds? Guide bund may be given an elliptical shape separation of flow can be avoided better with such an alignment. Alternatively straight parallel

Flow, what is maximum flood level

what is maximum flood level

Process to calculate the initial tension, Process to calculate the Initial ...

Process to calculate the Initial Tension The maximum stress induced in the prestressing tendon at the time of the stressing operation is known as initial tension in tendons. T

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