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

Surveying, what do you understand by the term local attraction

what do you understand by the term local attraction

Plane table surveing, in plane table surveying which activity is done first...

in plane table surveying which activity is done first whether centering or levelling?

What do you mean by plain elastomeric pads, Q. What do you mean by Plain el...

Q. What do you mean by Plain elastomeric pads? Plain pads are used for light or moderate loadings. Plain pads have a tendency to bulge under heavy loadings. In order to reduce

Critical-depth relationship, If y1 and y2 are alternate depths of a rectang...

If y1 and y2 are alternate depths of a rectangular channel show that Yc³ =2y1²y2²/(y1+y2) Also specific energy E = y1²+y1y2+y2²/(y1+y2)

Precast pile, when a precast pile is single point lifting and when double p...

when a precast pile is single point lifting and when double point lifting- what are the moment coefficient of them?

Grades of concrete, mixing ratio of different type of ready mix concrete.(R...

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

Bitumen tests, discussion of each bitumen test, its significance and import...

discussion of each bitumen test, its significance and importance in understanding and working with bitumen

Example for productivity analysis and improvement, Example for Productivity...

Example for Productivity Analysis and Improvement An excavator with a bucket capacity of 3-yd 3 has a standard production rate of 2,160-yd 3 for an 8-hour day.  The job site

Tack rivet, tack rivet figures with connections

tack rivet figures with connections

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