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
symbols of electrical layout

You wish to buy a house and you can afford to make a down payment of $50,000. Your monthly mortgage payment cannot exceed $2,000. If 30-year loans are available at 7.5% annual inte

Define Inspection of Steel or Cast Iron Substructures? Corrosion is the principal cause of deterioration in steel waterfront substructures. On bare un-protected steel pilings,

mixing ratio of different type of ready mix concrete.(RMC)

construction & working of rope brake dynamometr

friction problems

Explain the term - Characteristic Strength The strength of  a material below which not more than 5 percent results are expected to fall is considered as the characteristic stre

What is Polymer Concrete?

limitation in using with bitumen as watertight material

Testing of Aggregates: For use in pavement, road aggregates have to be strong, durable and of good shape. A well-graded aggregates adds to the stability of the layer. The fol