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

Cement Sand Plaster, How to use plaster cement in sand?  Cement sand pl...

How to use plaster cement in sand?  Cement sand plaster is a layer of cement & sand mortar that is applied over walls made of brickwork, cement block work, RCC walls and RCC co

Calculate the settlement at the centre of the mat, A mat foundation of 15...

A mat foundation of 15 m x 15 m and weighing 20000 N/m 2 is to be constructed on the surface of a soil strata. The profile is given in Figure. The number of squares enclosed i

Define the precedence diagramming methods, Define the Precedence Diagrammin...

Define the Precedence Diagramming Methods a) Activity on Node (AON) with arrows for dependencies b) Uses all forms of precedence relationships

Explain the coordinate system, Explain the Coordinate System 1. A Bench...

Explain the Coordinate System 1. A Benchmark provides only elevation data. 2. Coordinate System provides northing and easting coordinates within a defined system. 3. Coor

Estimate the activity durations - construction management, Estimate the Act...

Estimate the Activity Durations The total labor cost for emergency bridge rehabilitation on an interstate highway is $5,716,440.  The average crew-hour cost is $15,879 for this

Vectors application, how does vectors apply mathamatical in civil engineeri...

how does vectors apply mathamatical in civil engineering

Formation of frost heave, Q. Formation of frost heave? In the past, it ...

Q. Formation of frost heave? In the past, it was believed that formation of frost heave was related to volumetric expansion of soil water which changed from liquid state to sol

What is switch and expansion joint, Q. What is Switch and Expansion Joint? ...

Q. What is Switch and Expansion Joint? Switch Expansion, Joint (SEJ) is an expansion joint installed at each end of LWR/CWR to permit expansion/contraction of the adjoining bre

Specification of flooring for heavy repair shed, Q. Specification of Floori...

Q. Specification of Flooring for heavy repair shed? Scope for use - For flooring for heavy repair shed, Surface hardened concrete flooring can used. In this type of flooring,

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