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

Steps to determine brake (bhp) and motor horsepower (mhp), Steps to determi...

Steps to determine the brake (bhp) and motor horsepower (mhp):  1) Determine water horsepower (whp). h A (Qgpm) (SG) / 3956 OR h A (Qcfs) (SG) / 8.814 2) Apply the pump

Timber design, design of timber in flexural members in terms of extreme fib...

design of timber in flexural members in terms of extreme fibre stress in bending, maximum horizontal shear stress, deflection and bearing stress perpendicular to the grain. the ful

Conditions of pumping performance, Question In conditions of pumping pe...

Question In conditions of pumping performance, how have to engineers determined use of radial flow pumps and axial flow pumps ? Answer Exact speed is usually define

Zero energy building , this is our final year project .please help me to gu...

this is our final year project .please help me to guide about it

Explain the perception reaction time, Explain the Perception Reaction Time ...

Explain the Perception Reaction Time A significant variable in the successful processing and use of information is the speed with which this is done. Perception-Reaction Time (

Assignment., classification and characterstics of lintels

classification and characterstics of lintels

Beams of uniform strength, determine the cross section of a rectangular bea...

determine the cross section of a rectangular beam of uniformly strength for a simply supported beam of 6m span subjected to central concentrated load of 20kN a)by keeping depth of

Surveying, What''re the procedures of contouring by graphical interpolation...

What''re the procedures of contouring by graphical interpolation

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