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

Float or slack of an activity is positive or negetive, 1. What take place w...

1. What take place when float or slack of an activity is positive Ans: It represents a situation where extra resources are available and the completion of the project is not de

Radial contour, how to calculate distance for radial contour

how to calculate distance for radial contour

Define bank volume to be stockpiled and used for backfill, An earthwork con...

An earthwork contract was awarded to excavate and backfill the foundation of a proposed 50-ft by 50-ft office building.  The existing grade elevation is 437.5-ft while the sub-base

What is the meaning of untensioned reinforcement, Supplementary or Untensi...

Supplementary or Untensioned Reinforcement It is that reinforcement, provided in prestressed concrete member, which is not provided in a stretched condition like tendons.

Explain the purpose of embedding puddle flange, Purpose of embedding puddle...

Purpose of embedding puddle flange inside the walls of closed valve chambers When valves are closed to stop water flow in a pipeline, a thrust is produced along the direction o

Keywords related to water transportation, Keywords related to water transpo...

Keywords related to water transportation: Oceanic Shipping: Shipping taking place in the oceans. Coastal Shipping: Shipping taking place along the coast line. Inlan

Method to calculate the loss of prestress, Method to calculate the loss of ...

Method to calculate the loss of prestress When the consider creep in regard to loss of prestress, we have to see that the prestressed member is under compressive stresses due

Verify the magnification and transmitted force, The exciting force in a con...

The exciting force in a constant force type of excitation was 120 kN. The natural frequency of the machine foundation is 4 Hz. The damping factor is 0.36. Verify the magnificati

Hydaurlics : pelton and francis turbine, what are the factors which influen...

what are the factors which influence the efficiency of the turbine?

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