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

Write short notes on abrasion test, Q. Write short notes on Abrasion Test? ...

Q. Write short notes on Abrasion Test? The abrasion test for ballast shall be carried out using Los-Angeles machine.The abrasive charge shall consist of 12 nos. cast iron or s

Major differences between sureties and security, Question What are majo...

Question What are major differences between sureties and security ? Answer During construction contracts, if a contractor fails to carry out works, employer would e

Define ways of providing the anti slip device - by stops, Define Ways of pr...

Define Ways of providing the anti slip device - By stops? In this method stopper plates or angles are welded to the underside of the girder and embedded in the bed block. It sh

Road drainage and maintenance, Road Drainage and Maintenance: The life...

Road Drainage and Maintenance: The life of a road depends upon how well and quickly the water is drained away from its various components. Similarly, regular and periodic insp

Industrial steel floor fire proof, i want to know the construction details ...

i want to know the construction details of industrial steel floor?

Can you explain curved heads, Q. Can you explain Curved heads ? In case...

Q. Can you explain Curved heads ? In case of rivers carrying high discharges of the order of 28300 m 3 Is and above, Gale's recommendations are more conservative than Spring's

Strength of materials, An I-section beam 350*200mm2 has a web thickness of ...

An I-section beam 350*200mm2 has a web thickness of 12.5mm & a flange thickness of 25mm. It carries a shearing force of 200KN at a section. Sketch the shear stress distribution acr

CAD IN CIVIL ENGINEERING DRAWING LAB, EXPLAIN THE PROCEDURE FOR PREPARATIO...

EXPLAIN THE PROCEDURE FOR PREPARATION OF DRAWING USING AUTOCAD FOR RAPID SAND FILTER

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