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

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

The material that have lowest resistivity is , The material that have lowes...

The material that have lowest resistivity is Answer: Silver is the material

Determine the term- shrinkage of concrete, Determine the term- Shrinkage of...

Determine the term- Shrinkage of Concrete Shrinkage of concrete is primarily due to gradual loss of moisture which results in change in volume. The shrinkage of concrete depend

Bending stress distribution diagram, i want to know how bending stress dist...

i want to know how bending stress distribution in c section

Collapse mechanisms in unsymmetrical portal frames, How to find beam,sway a...

How to find beam,sway and combined mechanisms for unsymmetrical portal frames? Also how to find the critical mechanisms by using plotting method?

Disparities between regular precast and pipe jacking, Question What are...

Question What are main disparities in design between regular precast concrete pipes and pipes used for pipe jacking ? Answer For pipes used for pipe jacking, they h

Describe the geophysical profileof borings, Describe the Geophysical Profil...

Describe the Geophysical Profileof Borings The variation in the thickness of the soil stratum for engineering application is known as the geophysical profile. Figure 1.2 shows

Soil mechanics, what is the total volume required for the gravel material o...

what is the total volume required for the gravel material of 6.5mx2314mx0.1m with a relative density of 2.919 and a loose bulk density of 1668kg/m3

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