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

Foundation recommendation, what are the necessary data required for foundat...

what are the necessary data required for foundation recommendation other than SPT value ? why can''t we go for SPT value alone?

Geodesy, what is the difference between geodesy and plane survey

what is the difference between geodesy and plane survey

State the term axial prestressingin - Concrete, State the term Axial Prestr...

State the term Axial Prestressingin Concrete If the centroid of cross-sectional areas of tendons is at the location of the centroid of the cross-section of the concrete member,

Determine the weight of solids mixed in the suspension, In a hydrometer ana...

In a hydrometer analysis, the corrected hydrometer reading in a 1000 ml uniform soil suspension at the start of sedimentation was 28. After a lapse of 30 minutes, the corrected hyd

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

Explain the spiral curves - transportation, Explain the Spiral Curves - Tra...

Explain the Spiral Curves - Transportation A spiral is a curve of continuously changing radius. It varies from 0 degree of curvature (infinite radius) at its TS (Tangent to Spi

Need survey paper, Write a Survey Paper: Write between 7 to 10 pages a...

Write a Survey Paper: Write between 7 to 10 pages a survey paper in one of the following topic :  ( The Future of HCI. )  For the paper the font size should be 12 points

Presence of deleterious material, Presence of Deleterious Material De...

Presence of Deleterious Material Deleterious materials are vegetable matter, soft particles, clay lumps, mica, coal, etc. which can adversely affect the performance of aggreg

Define ways of providing the anti slip device - by bolting, Define Ways of ...

Define Ways of providing the anti slip device - By Bolting? The elastomeric bearing can be vulcanised with a stainless steel outer plate. The stainless steel plate is provided

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