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

Interface between base plates and footings, Interface between base plates a...

Interface between base plates and footings Surface of footings is generally quite rough so that some levelling has to be carried out for base plates. Interface between base pl

Cross drainage work, Cross Drainage Work: Several natural streams, ri...

Cross Drainage Work: Several natural streams, rivers and canals cross the road. They have to be led across the road through culverts and bridges. That given structures is kno

Calculate dead, A building cross section is shown below. The building consi...

A building cross section is shown below. The building consists of eight (8) of the shown frames placed at distance of 20 feet oc for a total length of 140 feet. The glulam beams ar

Surveying, what is the trignomerty leveling

what is the trignomerty leveling

Determine the ground elevation, The trigonometric levelling from the survey...

The trigonometric levelling from the surveyor's notes is shown below. The ground elevation of T (ft) is most nearly: Solution:  The elevation of point P can be found from: E

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