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

Shape and soundness test - testing of aggregates, Shape and Soundness Test ...

Shape and Soundness Test - Testing of aggregates: Shape For providing a good interlock and strength, the aggregates should be cubical in shape. Elongated and flaky pa

Lime, LIME It is significant binding material utilized in building con...

LIME It is significant binding material utilized in building construction. Lime has been utilized as the material of construction from ancient time. While it is mixed with san

Intercepting drains, Intercepting Drains: Intercepting drains, also k...

Intercepting Drains: Intercepting drains, also known as catch-water drains, are provided in the uphill slope of hill roads to intercept the water and lead it to a natural wat

Dual frequency & colour fathometer - sounding/sensing device, Define Dual f...

Define Dual frequency and colour fathometer - Sounding/Sensing Devices? Dual Frequency and Colour Fathometers can be used to detect refill in the scoured area since more than o

What is codal provisions, According to National Building Code (Sp:7 1970), ...

According to National Building Code (Sp:7 1970), the differential settlement shall be kept within the limits to which the superstructure can accommodate itself without harmful dist

Flat footed rail, pls tell about flat footed rail and it weight how much fo...

pls tell about flat footed rail and it weight how much for 40 * 80 *10 mm

Shear stress, shear stress numerical of T section & I section to find maxim...

shear stress numerical of T section & I section to find maximum shear stress

Large scale integration chips have between the components, Large scale int...

Large scale integration chips have between the  components? Answer : It is between 100 and 1000 components.

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