Environmental Question, Civil Engineering

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
Posted Date: 4/1/2013 10:52:47 PM | Location : United States







Related Discussions:- Environmental Question, Assignment Help, Ask Question on Environmental Question, Get Answer, Expert's Help, Environmental Question Discussions

Write discussion on Environmental Question
Your posts are moderated
Related Questions
DEFINITION TYPE STEP OF CONSTRUCTION STEP OF SAFETY


Road base vs. base course in flexible carriageway Roadbase is the most significant structural layer in bituminous pavement. It's designed to take up the function of distributi

Q. What is Raft Foundation? A raft or mat is combined footing that covers the entire area beneath a structure and supports all the walls and coloumn when the allowable soil pre

what is sheer stress on triangle beam.

Determine the meaning of Relaxation of Steel If the strain in steel is kept constant, it is seen that stresses in it reduce with time. It is called as relaxation of steel. Ten


State the term - calculation of deformation of concrete For the calculation of deformation of concrete at some stage before the maximum shrinkage is reached, it may be assumed

Purpose of carrying out water absorption test for precast concrete pipes Cement will mix with more water than is essential to ultimately combine during hydration of cement pas

A project requires that activities A and B can be started independently and activities C and D are independent but can be started after A and B have been completed. Activity E can