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

How to calculate the combined stresses, Compute the stresses at top and bot...

Compute the stresses at top and bottom fibers in a simply supported pre-stressed concrete beam with a rectangular cross section, 250 mm wide and 450 mm deep, as shown in Figure, at

Strength - aggregate impact test, Strength: The strength of aggregate...

Strength: The strength of aggregates is determined from one of the three tests : Aggregate Impact Test In which the aggregates in a mould are subjected to impact caus

Design of flexible pavements - road pavements, Design of Flexible Pavements...

Design of Flexible Pavements: The design of flexible pavements is done by the CBR method. The CBR test, described further, gives an indication of the supporting power of the

Thermocouples are utilized for the measurement of what, Thermocouples are u...

Thermocouples are utilized for the measurement of what temperature? Answer: It is utilized for the measurement of temperature.

Designing of roadbase material, Question In General Specification for C...

Question In General Specification for Civil Engineering Works, designing of roadbase material is based on recipe approach. Give reason. Answer Designing of roadbase

Pros and cons of a variety of non-destructive weld methods, Question In...

Question In checking quality of weld, what are pros and cons of a variety of non-destructive weld inspection methods as in ultrasonic test, radiographic inspection and magnetic

Compute the porosity of the initial soil sample, A completely saturated sam...

A completely saturated sample of clay has a volume of 31.25 cm 3 and a weight of 0.5866 N. The same sample after drying has a volume of 23.92 cm 3 and a weight of 0.4281 N. Compu

Timber, TIMBER Timber refers to wood utilized for construction works. A...

TIMBER Timber refers to wood utilized for construction works. Actually the word timber is derived from an old English word 'Timbrian' that means 'to build'. A tree that yields

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?

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