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

TIMBER PILE, ADVANTAGE AND DISADVANTAGE OF TIMBER PILE

ADVANTAGE AND DISADVANTAGE OF TIMBER PILE

Calculate the most probable value, The most probable value of the following...

The most probable value of the following observations on the same angle (35º 17' 42" ; 35º 17' 38" ; 35º 18' 00" ; 35º 17'; 22"; 35º 17' 42");  is most nearly:   35º 17' 40.8

Cone, if the diameter of the base remains constant by what factor should th...

if the diameter of the base remains constant by what factor should the altitude be multiplied to produce a cone with twice volume as the original

Demonstrate the design of prestressed concrete poles, Demonstrate the Desi...

Demonstrate the Design  of Prestressed concrete poles Prestressed concrete poles are generally designed as members with uniform prestress since they are subjected to bending mo

Single flemish bond, advantages and disadvantages in single flemish bond

advantages and disadvantages in single flemish bond

Cost-volume relationship, Cost-volume relationship: Cost-volume relati...

Cost-volume relationship: Cost-volume relationship is illustrated through a simple example dealing with the cost of operating an automobile. To perform the analysis following

Rectangular tie, using an optical square how would you perform a rectangula...

using an optical square how would you perform a rectangular tie?

Define scour - underwater inspection of bridges, Define Scour - Underwater ...

Define Scour - Underwater Inspection of Bridges? Whenever a bridge crosses a waterway, even a small or intermittent one, scour is a dangerous effect that can damage bridge pier

Why do we need to control air pollution, Why do we need to control air poll...

Why do we need to control air pollution? a. It causes harmful effects on human health,  Materials and property,  Plants and Animals, Visibility, Global climate and others b.

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