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

Test for determination of uitimate compressive strength, Q. Test for determ...

Q. Test for determination of Ultimate Compressive Strength The test pieces are to be loaded either till the failure of the steel laiminate or till the irreversible squeezing ou

Define chlorides - underwater inspection of bridge, Define Chlorides - unde...

Define Chlorides - underwater inspection of bridge? Chlorides do not attack plain concrete when present in the concentrations that normally exist in seawater, but may greatly a

Why nautical mile is different from statute mile, One nautical mile is desc...

One nautical mile is described by one latitude minute of arc (there are 60 like minutes to a degree). This equals 1852 meters, and roughly (but coincidentally) 2000 yards or 6000 f

Cement, List the ingredients of cement And their functions

List the ingredients of cement And their functions

Effective span, what do u mean by effective span and its derivation?

what do u mean by effective span and its derivation?

Main concern regarding design of pavements, Question If In case a road ...

Question If In case a road passes from side to side a reclaimed land and an existing land, what is key main concern regarding design of pavements? Answer For a breathin

Modern trends in transportation, Modern Trends in Transportation: Rapi...

Modern Trends in Transportation: Rapid urbanization that is taking place in India is putting severe strain on the road system. Modern systems like exclusive bus lanes, light r

Tests on stones, Tests on Stones To ascertain the needed properties of ...

Tests on Stones To ascertain the needed properties of stones, described tests can be conducted: A.   Crushing strength test B.   Water absorption test C.   Abrasion te

#high way engineering about road pavements.., what is the function of longi...

what is the function of longitudinal joints in concrete road pavements?

Explain dielectric breakdown, Explain Dielectric breakdown Dielectric ...

Explain Dielectric breakdown Dielectric breakdown means failure or deterioration of the dielectric material because of various reasons.

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