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

Harbour, typical layout showing dock,quay.jetties,turning circle,pier

typical layout showing dock,quay.jetties,turning circle,pier

Determine about the post-tensioned concrete, Determine about the post-tensi...

Determine about the post-tensioned concrete The transfer stage may take place after a long time from the casting of concrete, in the case of post-tensioned,members, enabling th

Loss of camber in steel girders, Steel triangulated (open web) girders are ...

Steel triangulated (open web) girders are provided with camber to compensate for deflection under load. Out of the total design camber, the part corresponding to dead load is calle

Low cost roads connecting villages, Low Cost Roads Connecting Villages: ...

Low Cost Roads Connecting Villages: Problem of Village Connectivity It is estimated that nearly 45 per cent of India's villages are not connected by an all-weather ro

Major functions of features observed in a typical manhole, Question Wha...

Question What are the major functions of following features observed in a typical manhole ? Answer (i) Groove near benching, (ii) R.S.J. (iii) double seal manhole cove

Use single lock nuts or double lock nuts, Question In linking fenders t...

Question In linking fenders to pier organizations, would single lock nuts or double lock nuts be used? Answer In pier structures connection offenders to piers is a

What are advantages and disadvantage of varnishing, Q. What are advantages ...

Q. What are advantages and disadvantage of varnishing? Varnish is a clear pale solution of a resinous substance ( like amber, common resin, copal, lac, or shellac 0 dissolved i

English, Features of literary writing

Features of literary writing

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