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

Why is the statue of liberty made of copper, Copper is a very durable mater...

Copper is a very durable material when exposed to weather and is soft enough that it can be simply molded to curved shapes like those in the Statue of Liberty. It is also tradition

Direct levelling, to find height difference between two or more points in d...

to find height difference between two or more points in different conditions

Bricks, BRICKS Brick is obtained by moulding good clay into a block, wh...

BRICKS Brick is obtained by moulding good clay into a block, which is dried and then burnt. It is the oldest building block to replace stone. Manufacture of brick started havin

Rebound hammer.., rebound hammer working mechanism with detailed specificat...

rebound hammer working mechanism with detailed specifications of the images

Structural drawing, Overview   A structure is required to support a conv...

Overview   A structure is required to support a conveyor and various ancillary equipment, between two buildings in an industrial area. It is 12m long and made up of structural s

Explain different types of texture and structure of soils, (a) Relate dissi...

(a) Relate dissimilar formations of soils to the geological aspects. (b) Explain different types of texture and structure of soils. (c) Bring out the typical characteristics

Dry process of cement, i want a complete flow chart of dry process of cemen...

i want a complete flow chart of dry process of cement

Moment of force on shoulders, During weight training,an athlete pulls a wei...

During weight training,an athlete pulls a weight of 500 N with his arms pulling on a handlebar connected to a universal machine by a cable.Find the moment of the force about the sh

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

Define steel substructure - underwater inspection of bridge, Define Steel s...

Define Steel substructure - underwater inspection of bridge? Steel is used as a structural material and as external protective cladding on concrete foundation elements. Steel f

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