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

Write short notes on numerical rating of bridges, Q. Write short notes on N...

Q. Write short notes on Numerical rating of Bridges? In the numerical rating system, the condition of a bridge is represented by a number consisting eight digits. This eight di

Sewer, what are the procedure of surveying for sewer projects/

what are the procedure of surveying for sewer projects/

Ild and rolling load, how to solve ild and rolling load problem for shear f...

how to solve ild and rolling load problem for shear force and bending moment with the diagram.

Explain precedence relationships - construction management, Explain the Pre...

Explain the Precedence Relationships a. Finish-to-Start - the most common, the predecessor activity must finish before the successor activity can start b. Finish to Finish

Bridge design, criteria for economical span length in bridge

criteria for economical span length in bridge

What is diaphragms in bridges, Q. What is Diaphragms in bridges? Diaph...

Q. What is Diaphragms in bridges? Diaphragms in bridges The principal function of diaphragms is to provide stiffening effect to deck slab in case bridge webs aren't situat

Road binders - bitumen, Road Binders: Bitumen: Bitumen is a viscous, s...

Road Binders: Bitumen: Bitumen is a viscous, semi-solid material, dark in color, having adhesive properties, and derived from the distillation of petroleum crude in a refinery

Bridge abutment be placed under an embankment, Question It should be necess...

Question It should be necessary that raking piles of a bridge abutment be placed under an embankment ? Answer For a bridge abutment to be supported on raking piles with dive

State the effect of friction for a straight tendon, State the effect of fri...

State the effect of friction for a straight tendon The length effect represents the effect of friction for a straight tendon due to slight imperfections of the duct. In practic

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