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

CANTILEVER RETAINING WALL, NEED TO DESIGN A CANTILEVER RETAINING WALL 8M HI...

NEED TO DESIGN A CANTILEVER RETAINING WALL 8M HIGH, SATURATED UNIT WEIGHT IS 16KN/M3, SURCHARGE IS 7KN/M2, LOAD ABOVE WALL SUPPORTED ON WALL STEM IS 10KN/M RUN, ANGLE IN INTERNAL F

Shear Iosipescu Test, First Can I use this device to test concrete specimen...

First Can I use this device to test concrete specimen? I think the specimens sustain tensile strength with fixing the jaws! I want to know it is true or not?

What are the limits of any soil classification system, Draw neatly the IS p...

Draw neatly the IS plasticity chart and label the symbol of several soils. What are the limits of any soil classification system? Explain the following tests with their meani

Tack coat – emulsified asphalts vs cutback asphalts, Tack coat - emulsified...

Tack coat - emulsified asphalts vs. cutback asphalts Emulsified asphalt is a suspension of asphalt in water by employing an emulsifying agent that imposes an electric charge o

Explain coagulation - Surface Water, Explain Coagulation Surface wa...

Explain Coagulation Surface waters must be treated to remove turbidity, color and bacteria The traditional sand filtration is not sufficient in removing bacteria, viru

Levelling, how to go about the collimation method.

how to go about the collimation method.

DECK ENGINEERING CALCULATIONS, We need eng. calcs for a deck 17''x 10 feet...

We need eng. calcs for a deck 17''x 10 feet.attach to the guest house. calculations will be for 230 psi snow load . in the city of Mammoth lakes Ca. deck is supported for 3 girder

Constructed wetland design guidelines, Develop a simple urban constructed w...

Develop a simple urban constructed wetland design guidelines and drawings. Your report should include the following: I. Data required for the design II. Types of constructed

Keywords of airport management, Keywords of Airport management: Air T...

Keywords of Airport management: Air Traffic Control: A system by which air routes, flight rules for flying aircraft and navigational facilities are provided in an airport.

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