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

Calculate the monthly payment for home mortgage, Your home mortgage is $300...

Your home mortgage is $300,000 for 30 years with a nominal annual rate of 7%. The monthly payment is most nearly: Solution: n = 360 months interest = 7%-annual ÷ 12-months/year

Poly tetra fluoro ethylene (PTFE) is used in sliding bearing, Question W...

Question Why Poly tetra fluoro ethylene (PTFE) is usually used in sliding bearings? Answer The choice of sliding surface of bearings is of very important importance sinc

How the water table may rise to the ground surface, State the size of a squ...

State the size of a square footing at the ground level to transmit a load of 900 kN in sand weighing 18 kN/m 3 and having an angle of shearing resistance of 36° (N  = 46, Nq = 43)

Cement testing, explain the importance of following standard procedure

explain the importance of following standard procedure

Staircase, The Figure 1 below shows a section through a stairway for a gara...

The Figure 1 below shows a section through a stairway for a garage in a new proposed dwelling. The stairway is 3 meters wide with 300 mm wide treads(7 treads) and 170 mm high riser

Estimation of loading carrying capacity, Question While designing mini...

Question While designing mini-piles , should strength of grout be disused during estimation of loading carrying capacity? Answer While designing min-piles, there will

What is the meaning of elastic shortening of concrete, What is the meaning ...

What is the meaning of Elastic Shortening of Concrete At the transfer stage, compressive prestressing force is transferred to the concrete. Due to this compressive force, concr

Calculate the surface dimensions of sedimentation tank, Calculate the surfa...

Calculate the surface dimensions of Sedimentation Tank A treatment plant upgrade calls for design of sedimentation basins to handle a flow rate of 8 MGD. The basins are for a T

#tile.., Material for formwork and their specifications

Material for formwork and their specifications

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