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

Design the curtain to touch the seabed, Question For fixing of silt cur...

Question For fixing of silt curtains, what is the reason that it does not desirable to design the curtain to touch the seabed ? Answer Silt finished are resistant ve

Diferential equations, show that Y = 4e2x - 2e-3x is a solution of initia...

show that Y = 4e2x - 2e-3x is a solution of initial-value problem (d2y)/(dx2)+ (dy)/(dx) - 6y=0 ; y(0)=6 ; y’(0)=2 . is Y = 2e2x - 4e-3x also a solution of this proble

Masonry, Sketches for English bond, Stretcher bond, Header bond, Flemish bo...

Sketches for English bond, Stretcher bond, Header bond, Flemish bond in first & second layer plan, elevation and 3 dimensional view of brick bond.

Surveying, with a neat well labelled sketch, explain reciprocal ranging.

with a neat well labelled sketch, explain reciprocal ranging.

Concrete, types of concrete and its uses

types of concrete and its uses

Helical reinforcement designed instead of regular links, Question For colum...

Question For column reinforcements, why is helical reinforcement sometimes designed instead of regular links with reasons? Answer The utilization of links for column designi

Determine the dimension of the vertical side walls, Determine the dimension...

Determine the dimension of the vertical side walls for a rectangular open channel designed to convey 150 cfs of storm water runoff. The runoff is collected in the parking lots and

Self compacting concrete, what will be the w/c ration and cement/fly ash ra...

what will be the w/c ration and cement/fly ash ration for the particular mix design

Site plan, can I have some help with a site plan. I want it on autocad, I h...

can I have some help with a site plan. I want it on autocad, I have all the dimmension

In marine pile type of steel tubular piles, Question In marine pile typ...

Question In marine pile type of steel tubular piles with reinforced concrete infill, least toe level is frequently specified in contract drawings. What is the purpose in your v

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