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

Fluid Mechanics, I am taking a fluid mechanics class that is related to was...

I am taking a fluid mechanics class that is related to wastewater treatment. I need help with my homework

Describe types of spurs, Q. Describe types of Spurs? Spurs can be of va...

Q. Describe types of Spurs? Spurs can be of varied types. They may be either permeable or impermeable. Permeable spurs are open structures constructed by driving wooden balties

Define surface water treatment rule (swtr), Define Surface Water Treatment ...

Define Surface Water Treatment Rule (SWTR) SWTR sets forth primary drinking water regulations requiring treatment of surface water supplies or groundwater supplies under the di

Bleeding test for grout – an essential requirement, Q. Bleeding test for gr...

Q. Bleeding test for grout – an essential requirement? Bleeding is a form of segregation in that a layer of water migrates to surface of the grout at the time of the initial st

Calculus, how can i get the centroids of the a given curve?. is there''s a ...

how can i get the centroids of the a given curve?. is there''s a formula for?

Airport management, Airport Management: Airlines (a)        Adequ...

Airport Management: Airlines (a)        Adequate space for each airline for ticketting, check-in and baggage handling, and (b)       Adequate space for airline staff.

What is the unit weight of water, In a pipette analysis, 0.5 N of dry soil ...

In a pipette analysis, 0.5 N of dry soil (fine fraction) of specific gravity 2.72 were mixed in water to form half a litre of uniform suspension. A pipette of 10 ml capacity was

Explain the rippl diagram or mass diagram, Explain the Rippl Diagram or Mas...

Explain the Rippl Diagram or Mass Diagram For a potable water reservoir, it is the simultaneous plots of the cumulative inflow and cumulative water consumption/demand, termed "

Determine the specific gravity of solids, The Atterberg limits of a clay so...

The Atterberg limits of a clay soil are: Liquid limit = 63%, Plastic limit = 40%, and shrinkage limit = 27%. If a sample of this soil has a volume of 10 cm 3 at the liquid limit a

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