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

Resting on several raking piles, Question Should dolphins be designed i...

Question Should dolphins be designed in a rigid manner such as resting on several raking piles? Answer While designing dolphins, they are normally supported on a syste

Uses of stones, Uses of Stones Stones are used in the following civil e...

Uses of Stones Stones are used in the following civil engineering constructions are described: (i) Stone masonry which is used for the construction of foundations, , columns

Stabilization of Black Cotton soil, How the stabilization of black cotton ...

How the stabilization of black cotton soil was done in field? what are the methods to do that?

Heat transfer, Three mechanisms: 1) Conduction - occurs in solids and st...

Three mechanisms: 1) Conduction - occurs in solids and stationary fluids (liquids or gases). 2) Convection - occurs in fluids. Change in the buoyancy of the fluid due to its

Use of admixtures in concrete, Use of Admixtures in Concrete The use of...

Use of Admixtures in Concrete The use of chemical admixtures may be made in prestressed concrete construction. But the admixture should not contain chlorides in any form. This

Shear force and bending moment, how to draw shear force and bending moment ...

how to draw shear force and bending moment from load intensity

Explain Fluid mechanics or properties - specific gravity, Fluid Mechanics o...

Fluid Mechanics or Properties - Specific Gravity Dimensionless ratio of a fluid's density to some standard reference density. For liquids and solids, the reference density is p

Road pavements, Road Pavements: Pavements constitute an important part...

Road Pavements: Pavements constitute an important part of road as they withstand the traffic loads and transmit them to the earthen embankment. A study of the types of pavemen

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