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

Corner reinforcement for concrete pavement, Q. Corner reinforcement for con...

Q. Corner reinforcement for concrete pavement? Let's consider a panel of concrete slab without any load transferring devices at it edges. When concrete panel is subjected to tr

Normal approximation to compute the probability, Normal approximation to co...

Normal approximation to compute the probability: A lot contains 100 articles of which 10 are defective. The lot is rejected if a random sample of 10 articles drawn from the lo

Strength of materials, distribution of shear stress in triangular section

distribution of shear stress in triangular section

Determine the concept of shrink-fitting of metal tyres, Determine the conce...

Determine the concept of Shrink-fitting of metal tyres Shrink-fitting of metal tyres on the wheels of bullock carts is well known. As the hot metal tyre rings cool down, they a

Calculate the total passive earth resistance on the wall, A  retaining wall...

A  retaining wall, 4.5 m high, retains a soil with  c = 2 N/cm 2 ,  φ = 30° and g = 20 kN/m 3 , with horizontal surface level with the top of the wall. The backfill carries a surch

Max. moment at cantilever, max. moment at cantilever in up or down of suppo...

max. moment at cantilever in up or down of support or free of end

Theory of structures, haw do you salve a supple supported beam with a sprin...

haw do you salve a supple supported beam with a spring balance

Upper bound of indirect tensile strength, Question While designing rese...

Question While designing reservoirs, indirect tensile strength of the concrete mix is particular to be less than a specific value such as 2.8N/mm2 for potable water. Why ought

Fly levelling, we are given a project on field.i''d like to know about how...

we are given a project on field.i''d like to know about how to start n proceed vd fly levelling in the field

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