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

Determine the size of the standpipe which should be used, A sample in a var...

A sample in a variable head permeameter is 8 cm in diameter and 10 cm high. The permeability of the sample is estimated to be 10 × 10 -4 cm/s. If it is desired that the head in th

Plot vertical displacement - cantilever beam, 1. The cantilever beam-like s...

1. The cantilever beam-like structure  shown below is modeled  using  a 2 x 10 mesh of rectangular four-node plane stress elements of equal size. Do the following and compare with

Support, In a RC Frame what will be the support condition for a cantilever ...

In a RC Frame what will be the support condition for a cantilever edge beam i.e. fixed, pinned, encastre or knife?

Hazard, • A potential source of harm - Mechanical hazard - Electrical...

• A potential source of harm - Mechanical hazard - Electrical hazard - Cutting hazard - Toxic hazard - Fire hazard - Explosion hazard

Highway Engineering, I am a Civil Engg student. Why CBR Values determined ...

I am a Civil Engg student. Why CBR Values determined only at 2.5 and 5 mm penetration ?.

Telecommunication, Blocked process list is not maintioned in priority order...

Blocked process list is not maintioned in priority order why

Softening point test, Softening Point Test: The temperature at which ...

Softening Point Test: The temperature at which bitumen softens is determined by the "Ring and Ball" test (Figure). (a) Diagram of Apparatus at Beginning of Test  (b

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

Is codes for building materials and construction, IS CODES FOR BUILDING MAT...

IS CODES FOR BUILDING MATERIALS AND CONSTRUCTION The following is the list of some of the IS code giving requirements for building materials: IS 269-1989. Specification for ord

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