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

leveling, what are the diff.types of levels used in levlin

what are the diff.types of levels used in levling

Cleaning and greasing of rocker, Cleaning and greasing of Rocker & Roller b...

Cleaning and greasing of Rocker & Roller bearings of open web through girders : In case of standard open web through girders, no separate jacking arrangement is required as the en

Concrete, if the slump of concrete drops how to rectify it

if the slump of concrete drops how to rectify it

Explain the typical wastewater characteristics, Explain the Typical Wastewa...

Explain the Typical Wastewater Characteristics? Total Suspended Solids = 100 - 350 mg/L (200 mg/l is the typical value)    BOD 5 = 100-300 mg/L (200 mg/L is the typical val

Alluvial streams, Alluvial Streams: In alluvial streams, the regime w...

Alluvial Streams: In alluvial streams, the regime width of a river is calculated from the Lacey's formula : W = 4.8 Q ½ where  W = Regime width in m, and Q = Discha

Desirable characteristics of a pavement, Desirable Characteristics of a Pav...

Desirable Characteristics of a Pavement: In order to fulfill the above function, the pavement has to have the following desirable properties : (a) It should be structurall

Explain about bentonite slurry and polymeric slurry, Q. Explain about Bento...

Q. Explain about Bentonite slurry and polymeric slurry? For the construction of diaphragm walls, bentonite slurry is generally used to form a filter cake on walls of trenches t

Surveying, how to make plain scale

how to make plain scale

Determine the weight of one gallon of ferric chloride, The specific gravity...

The specific gravity of ferric chloride solution equals 1.3.  How much does one gallon of ferric chloride weigh?  Solution:  ρ ferric chloride /ρ water = 1.3       Conver

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