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

Major dissimilarity between standpipe, Question What is major dissimila...

Question What is major dissimilarity between standpipe, standpipe piezometer and piezometer ? Answer Standpipe usually contains plastic pipes with punctured holes at

Calculate load distribution factor, Load Distribution Factor: The form...

Load Distribution Factor: The formula for deriving at the number of repetitions of the standard axle load during a design period of n years is: N =365 × A × VDF × F [(1 + r

Shear force, what is shear failure and shear force please explian?

what is shear failure and shear force please explian?

Air infiltration, Using Matlab/ Simulink software, verify the heating requi...

Using Matlab/ Simulink software, verify the heating requirement (kW) for the building because of  air infiltration and natural ventilation. Note that this needs you to estimate air

Pulverized fly ash as cement replacement, Q. Pulverized fly ash as cement r...

Q. Pulverized fly ash as cement replacement? Pulverized fly ash is a type of pozzolans. It is analuminous or siliceous material that possesses no binding ability by itself. Whe

Force system, show the diagram for non coplanar non concurrent force system...

show the diagram for non coplanar non concurrent force system

What is the safe bearing capacity of a rectangular footing, What is the saf...

What is the safe bearing capacity of a rectangular footing, 1 m × 2 m, placed at a depth of 2 m in an saturated clay having unit weight of 20 kN/m 3 and unconfined compression str

How to determine the frequency of flood, Q. How to determine the frequency ...

Q. How to determine the frequency of flood? Flood frequency may be estimated preferably from flood records, if available, for a number of years or they may be based on rainfall

ENGlLISH, Ask question #WHAT is presentation skill #

Ask question #WHAT is presentation skill #

Show the concrete pressure on formwork, Q. Relation of pouring rate and tem...

Q. Relation of pouring rate and temperature with concrete pressure on formwork Freshly placed concrete exerts pressure on formwork at the time of the placing operation. It's i

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