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

Define storms - underwater inspection of bridge, Define Storms - underwater...

Define Storms - underwater inspection of bridge? Storms can have a detrimental effect on bridge substructure. The velocity and depth of water and debris carried increase in rel

Use of PFA and GGBS, Q. Use of PFA and GGBS? Both PFA and GGBS are by-p...

Q. Use of PFA and GGBS? Both PFA and GGBS are by-products of industry and use of them is ecologically friendly. Most significantly, with PFA and GBS adopted as partial replacem

What is admixtures, Q. What is Admixtures? These are the substance whic...

Q. What is Admixtures? These are the substance which are added to the concrete to improve its qualities either its placing or in its subsequent performance. An admixture may be

Aggragates, methods of extracting aggregates

methods of extracting aggregates

Surface cleaning tools for underwater inspection of bridge, Define Surface ...

Define Surface Cleaning Tools for Underwater Inspection of Bridge? To perform a thorough inspection, the marine growth on the structure must be removed. This can be done by var

State the design process of prestressed concrete, State the Design process ...

State the Design process of Prestressed Concrete Most of the times, the design process is an interactive and trial procedure in which the cycle of analysis - design - analysis

Define scour - underwater inspection of bridges, Define Scour - Underwater ...

Define Scour - Underwater Inspection of Bridges? Whenever a bridge crosses a waterway, even a small or intermittent one, scour is a dangerous effect that can damage bridge pier

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