Solved - Continuing The Preparation of The Proposal For The Eau ... [PDF]

Zitiervorschau





Textbook Solutions

Expert Q&A

Study Pack

Practice

NEW!



Search

Find solutions for your homework

home / study / engineering / civil engineering / environmental science & engg / environmental science & engg solutions manuals / introduction to environmental engineering / 5th edition / chapter 6 / problem 41p

Introduction to Environmental Engineering

Post a question Answers from our experts for your tough homework questions

(5th Edition)

Show all steps:

15 Bookmarks

Chapter 6, Problem 41P

Enter question ON

Problem

Continue to post 8 questions remaining

Continuing the preparation of the proposal for the Eau Gaullie treatment plant (Problem 6-38), design the flocculation tank by providing the following for the first two compartments only: 1. Water power input in kW

Snap a photo from your phone to post a question We'll send you a one-time download link

2. Tank dimensions in m 3. Diameter of the impeller in m 4. Rotational speed of impeller in rpm Use the following assumptions:

888-888-8888

Text me

1. Number of tanks = two By providing your phone number, you agree to receive a one-time automated text message with a link to get the app. Standard messaging rates may apply.

2. Tapered G in three compartments: 90, 60, and 30 s–1 3. Gθ = 120,000 4. Compartment length = width = depth

My Textbook Solutions

5. Impeller type: axial-flow impeller, three blades, NP = 0.31 6. Available impeller diameters: 1.0, 1.5, and 2.0 m 7. Assume

Introduction to...

Thermodyn… NEW 7th Edition MyOMLab...

5th Edition

Step-by-step solution

View all solutions

Step 1 of 12 Write the expression to determine the detention time of the treatment plant. …… (1) Here,

is the detention time of the treatment plant and

is the average of the Galileo

numbers. Determine the average of the Galileo numbers.

Comment

Step 2 of 12 Determine the detention time of the treatment plant. Substitute

for

and 120000 for

in the equation (1).

Comment

Step 3 of 12 Write the expression to determine the volume of the flocculation basin.

Here,

is the volume of the basin and

Substitute

for

and

is the flow discharge. for

.

Calculate the volume of the each flocculation basin.

Comment

Step 4 of 12 Each basin is divided into the three compartments, calculate the volume of the each compartment.

Assume the square compartment with the depth equal to the side of the square.

Comment

Step 5 of 12 Calculate the volume of the square compartment. Substitute

for

.

Therefore, the tank dimensions are

.

Comment

Step 6 of 12 Write the expression to determine the input power of each compartment.

Here,

is the input power and

Substitute

for

is the dynamic coefficient of viscosity.

,

Therefore, the water power input is

for

, and

for

.

.

Comment

Step 7 of 12 Determine the area of the compartment.

Determine the equivalent diameter of the tank using the following relation:

Consider the width of the tank.

Comment

Step 8 of 12 Calculate the geometric mean ratio of the radial turbine.

10th Edition



Substitute 3.3m for



and

for

Textbook Solutions

.

Expert Q&A

Study Pack

Practice

NEW!



Comment

Step 9 of 12 Determine the impeller diameter of the turbine as follows: Obtain the allowable tip speed from the table “Radial Turbine Impeller” of the text book for impeller diameter of 1m corresponding to the geometric ratio. Geometric ratio Impeller diameter

Impeller diameter

0.887

Hence, use the

0.89

as the impeller diameter.

Comment

Step 10 of 12 Write the expression to determine the rotational speed of the impeller for the first compartment. …… (2) Here,

is the rotational speed and

Substitute

for

is the density of the water.

,

for

, and

for

in the equitation (2).

Comment

Step 11 of 12 Calculate the rotation speed of the second compartment. Substitute

for

,

for

, and

for

in the equation (2).

Comment

Step 12 of 12 From the above two compartments, observe the tip speeds of the two compartments. The first impeller tip speed is less than the second one. Therefore, the assumption is correct.

Comment

Was this solution helpful?

7

0

Recommended solutions for you in Chapter 6 Chapter 6, Problem 57P

Chapter 6, Problem 13P

A plant expansion is planned for Urbana (Example 6-17). The new design flow rate is 1.0 m3/s. A deep-bed monomedia filter with...

Determine the lime and soda ash dose, in mg/L as CaCO3, to soften the following water to a final hardness of 80.0 mg/L as...

See solution

See solution

See more problems in subjects you study

COMPANY

LEGAL & POLICIES

CHEGG PRODUCTS AND SERVICES

About Chegg Become a Tutor Chegg For Good College Marketing Corporate Development Investor Relations Jobs Join Our Affiliate Program Media Center Site Map

Advertising Choices Cookie Notice General Policies Intellectual Property Rights Terms of Use Chegg Tutors Terms of Service Global Privacy Policy DO NOT SELL MY INFO Honor Code

Cheap Textbooks Chegg Coupon Chegg Play Chegg Study Help College Textbooks eTextbooks Chegg Math Solver Mobile Apps

© 2003-2020 Chegg Inc. All rights reserved.

Online Tutoring Sell Textbooks Solutions Manual Study 101 Textbook Rental Used Textbooks Digital Access Codes Chegg Money

CHEGG NETWORK

CUSTOMER SERVICE

EasyBib Internships.com Studyblue Thinkful

Customer Service Give Us Feedback Help with Chegg Tutors Help with eTextbooks Help to use EasyBib Plus Manage Chegg Study Subscription Return Your Books Textbook Return Policy