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 stability of the upstream slope of an earth dam, Stability of the...

Stability of the upstream slope of an earth dam Give the step by step procedure for examining the stability of the upstream slope of an earth dam by the Swedish method of slice

STRUCTURAL DYNAMICS, Consider a diver weighing 200 Ib at the end of a divin...

Consider a diver weighing 200 Ib at the end of a diving board that cantilevers out 3 ft. The diver oscillates at a frequency of 2 Hz. What is the flexural rigidity E I of the divin

Define surface water treatment rule (swtr), Define Surface Water Treatment ...

Define Surface Water Treatment Rule (SWTR) SWTR sets forth primary drinking water regulations requiring treatment of surface water supplies or groundwater supplies under the di

Pre-stressing work, Under which situation shall engineers use jacking in ag...

Under which situation shall engineers use jacking in agreement end only and from both ends in pre-stressing work?

Minimum volume of sump volume for pumps, Minimum volume of sump volume for ...

Minimum volume of sump volume for pumps Maximum pumping rate = Q P Volume of sump = V Inflow Rate = Q i Cycle Time T c = t 1 + t 2 t 1 = V / Q P - Q i t 2

Resolve the force, How to find the magnitude and the direction of the resul...

How to find the magnitude and the direction of the resultant

Overhanging beams, Do we take the whole length (including the over hanging ...

Do we take the whole length (including the over hanging portion when we say the "whole span" of th beam ?

Determine about the hard-drawn steel wires, Determine about the Hard-drawn ...

Determine about the Hard-drawn steel wires Hard-drawn steel wires which are indented or crimped are preferred for pre-tensioned members as their bond characteristics are superi

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