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

RAFTING, WHY RAFTING IS REQUIRED AND WHAT PRECAUTIONS SHOULD BE TAKEN DURIN...

WHY RAFTING IS REQUIRED AND WHAT PRECAUTIONS SHOULD BE TAKEN DURING RAFTING? AND WHAT IS THE ALTERNATE OF RAFTING.?

Equipments required for under water inspection of bridge, Define Equipments...

Define Equipments and tools required for under water Inspection of Bridge? Since the underwater inspection of stone masonry substructures involve only a cursory inspection of t

Solid mensuration, the base of an isosceles triangle and the altitude is dr...

the base of an isosceles triangle and the altitude is drawn from one of the congruent sides are equal to 18cm and 15cm , respectively . Find the lenghts of the sides of the triangl

Statics - rigid body of equilibrium, The ball of a trailer hitch is subject...

The ball of a trailer hitch is subjected to a force F. If the failure occurs when the moment of point F around point A reaches 11250 in lbs, determine the largest value F may have

Cover depths of jacking pipes, Question While pipe jacking or microt...

Question While pipe jacking or microtunneling , it is usually accepted that cover depths of jacking pipes cannot be also shallow as in less than 2D where D is the diameter o

Curved beams, Sir how can we find location of neutral axis for a curved bea...

Sir how can we find location of neutral axis for a curved beam of circular cross section,,,

Define safety precaution for underwater inspection of bridge, Define Safety...

Define Safety Precautions for Underwater Inspection of Bridge? The working agency should have its own diving safety manual, which should be strictly followed. This manual shoul

Project planning, can you please provide with an example for mobilisation a...

can you please provide with an example for mobilisation and demobilisation plan, induction and deployment schedule, broad execution schedule in excel,quantity schedule for major qu

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