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

Is cbr test is an arbitrary test, CBR Test is an arbitrary test', justify. ...

CBR Test is an arbitrary test', justify. Explain the procedure for conducting the CBR test in the field. Surcharge loads are used in the CBR test; Describe their significa

Define the influence line-beam shear, Define the Influence line-beam shear?...

Define the Influence line-beam shear?   1.  Replace point of interest with a link element of nominal length.  If the point of interest is a reaction, place a hinge at that poin

Fluid mechanics, Cd of venturimeter is more than that of orificemeter

Cd of venturimeter is more than that of orificemeter

Offset survey, what is offset survey and how it is done

what is offset survey and how it is done

Hydraulics assignment , I have assignment for hydraulics can you help for t...

I have assignment for hydraulics can you help for that

Consolidation settlement, The integration of strain over the depth is settl...

The integration of strain over the depth is settlement. The method of producing the settlement is non-recoverable when the intensity of stress is removed. Hence, a permanent reduc

Calculate the change in volume, Calculate the change in volume: If the...

Calculate the change in volume: If the bar is 1 m long with rectangular cross section of 300 mm deep and 400 mm wide, compute the change in volume of the solid because of a lo

Describe principles of river protection works, Q. Describe Principles of ri...

Q. Describe Principles of river protection works? Determination of design discharge for a bridge is sometimes required to be based on flood marks left during unprecedented abno

Storm water drainage - Road drainage and maintenance, Storm Water Drainage:...

Storm Water Drainage: In city streets, the disposal of rain water has to be done through a system of underground storm water drains. The water is collected at the roadside ke

Enthalpy, h = u + pv is a combination of properties and hence must also be ...

h = u + pv is a combination of properties and hence must also be a property.  h is the SPECIFIC ENTHALPY in kJ/kg  H = U + pV is the ENTHALPY in kJ

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