1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aleksklad [387]
3 years ago
11

A sludge pump pumps at a rate of 40 GPM. The raw sludge density is 4.5 percent solids. How many minutes per hour should the pump

operate if the inflow to the clarifier is 1.8 MGD, the influent suspended solids are 210 mg/L, and the effluent suspended solids are 60 mg/L
Engineering
1 answer:
Sergio039 [100]3 years ago
3 0

Answer:

The pump should operate at 6.25 minutes per hour

Explanation:

We have to find the minute per day pumping rate first.

Therefore,

Sludge removal lbs/ day = Sludge pumped lbs/day

Formula is given as:

(Suspended solids removed (mg/L) × Clarifier inflow(MGD) × 8.34lbs/gal) ÷ ( solids contents in % ÷ 100) = GPM Sludge pumping rate × minute per day pumping rate × 8.34 lbs/gal

From the question,

Suspended solids removed is calculated as : Influent suspended solids concentration - Effluent suspended solids concentration

= 210 mg/L - 60mg/L

Suspended solids removed = 150mg/L

Clarifier Inflow(MGD) = 1.8 MGD

Sludge density = 4.5% solids

GPM = 40 GPM

Minute per day pumping rate = is unknown so we represent it as y

Hence,

(150 mg/L × 1.8 MGD Flow × 8.34lbs/gallon) ÷ ( 4.5% ÷ 100) = 40 GPM × y minute per day pumping rate × 8.34 lbs/gallon

(150 mg/L × 1.8 MGD Flow × 8.34lbs/gallon) ÷ 0.045 = 40 GPM × y minute per day pumping rate × 8.34 lbs/gallon

50040 = 333.6y minute per day

y = 50040 ÷ 333.6

y = 150 minute per day pumping rate

In other to get the minute per hour pumping rate, we would convert the minute per day to minute per hour,

Therefore,

24 hours = 1 day

So we have,

150 minute per day ÷ 24 hours

= 6.25minute per hour

The pump should operate at 6.25 minutes per hour.

You might be interested in
Dear sir i want to ask something about the solution of my question?
Eva8 [605]
No you may not ask the question
3 0
2 years ago
I'm so confused to this question <br>What is the difference between Science and Engineering? ​
muminat

Explanation:

Science is the body of knowledge that explores the physical and natural world. Engineering is the application of knowledge in order to design, build and maintain a product or a process that solves a problem and fulfills a need (i.e. a technology).

4 0
3 years ago
Read 2 more answers
Write a GUI-based program that plays a guess-the-number game in which the roles of the computer and the user are the reverse of
AURORKA [14]

Answer:

import javax.swing.*;

import java.awt.*;

import java.util.Random;

import java.awt.event.*;

public class Guess extends JFrame

{

   private static final long serialVersionUID = 1L;

   private JButton newGame;

   private JButton enter;

   private JButton exit;

   private JTextField guess;

   private JLabel initialTextLabel;

   private JLabel enterLabel;

   private JLabel userMessageLabel;

   private int randNum;

   private int userInput;

   private int maxtries = 0;

   public Guess()

   {

       super("Guessing Game");

       newGame = new JButton("New Game");

       exit = new JButton("Exit Game");

       enter = new JButton("Enter");

       guess = new JTextField(4);

       initialTextLabel = new JLabel("I'm thinking of a number between 1 and 100. Guess it!");

       enterLabel = new JLabel("Enter your guess.");

       userMessageLabel = new JLabel("");

       randNum = new Random().nextInt(100) + 1;

       setLayout(new FlowLayout());

       add(initialTextLabel);

       add(enterLabel);

       add(guess);

       add(newGame);

       add(enter);

       add(exit);

       add(userMessageLabel);

   

       setSize(500, 300);

       addWindowListener(new WindowAdapter()

       {

           public void windowClosing(WindowEvent e)

           {

               System.exit(0);

           }

       });

       newGameButtonHandler nghandler = new newGameButtonHandler();

       newGame.addActionListener(nghandler);

       ExitButtonHandler exithandler = new ExitButtonHandler();

       exit.addActionListener(exithandler);

       enterButtonHandler enterhandler = new enterButtonHandler();

       enter.addActionListener(enterhandler);

   }

   class newGameButtonHandler implements ActionListener

   {

       public void actionPerformed(ActionEvent e)

       {

           setBackground(Color.ORANGE);

           guess.setEnabled(true);

           guess.setText("");

           enter.setEnabled(true);

           maxtries = 0;

           userMessageLabel.setText("");

           randNum = new Random().nextInt(100) + 1;

       }

   }

   class ExitButtonHandler implements ActionListener

   {

       public void actionPerformed(ActionEvent e)

       {

           System.exit(0);

       }

   }

   class enterButtonHandler implements ActionListener

   {

       public void actionPerformed(ActionEvent e)

       {

           userInput = Integer.parseInt(guess.getText());

           checkGuess(randNum);

      if(userInput > 100 )

          {

                               userMessageLabel.setText("invalid entry");

          }

       }

   }

   public void checkGuess(int randomNumber)

   {

       maxtries++;

     if(maxtries==10){

           userMessageLabel.setText("You Lose!!");

           guess.setEnabled(false);

           enter.setEnabled(false);

         

       }else if (userInput == randomNumber)

           {

               userMessageLabel.setText("Correct !");

           }

       else if (userInput > randomNumber)

           {

               userMessageLabel.setText("Too high");

           }

       else if (userInput < randomNumber)

           {

               userMessageLabel.setText("Too Low");

           }

   }

   public static void main(String[] args)

   {

       Guess game = new Guess();

       game.setVisible(true);

   }

}

8 0
3 years ago
What types of problems might an electrical engineer need to solve?
aleksandr82 [10.1K]

Answer:

sectores industriales, comerciales o públicos, o para el uso doméstico.

Explanation:

8 0
3 years ago
A polyethylene rod exactly 10 inches long with a cross-sectional area of 0.04 in2 is used to suspend a weight of 358 lbs-f (poun
Nadya [2.5K]

Answer:

Final length of the rod = 13.90 in

Explanation:

Cross Sectional Area of the polythene rod, A = 0.04 in²

Original length of the polythene rod, l = 10 inches

Tensile modulus for the polymer, E = 25,000 psi

Viscosity, \eta = 1*10^{9} psi -sec

Weight = 358 lbs - f

time, t = 1 hr = 3600 sec

Stress is given by:

\sigma = \frac{Force}{Area} \\\sigma = \frac{358}{0.04} \\\sigma = 8950 psi

Based on Maxwell's equation, the strain is given by:

strain = \sigma ( \frac{1}{E} + \frac{t}{\eta} )\\Strain = 8950 ( \frac{1}{25000} + \frac{3600}{10^{9} } )\\Strain = 0.39022

Strain = Extension/(original Length)

0.39022 = Extension/10

Extension = 0.39022 * 10

Extension = 3.9022 in

Extension = Final length - Original length

3.9022 =  Final length - 10

Final length = 10 + 3.9022

Final length = 13.9022 in

Final length = 13.90 in

7 0
2 years ago
Other questions:
  • What kind of energy transformation happens when a boy uses energy from a sandwich to run a race​
    11·2 answers
  • A compression ignition engine when tested gave an indicator card having area 3250mm^2 and length 73mm. The calibration factor wa
    10·1 answer
  • Wqqwfqwfqwfqfqfqffqwffqwqfqqfqfqffqqfqfwccc
    12·2 answers
  • What are the weight restrictions for a small UAS, including everything onboard at the time
    12·1 answer
  • The line voltage of a balanced three-phase transmission line is 4200 V rms. The transmission line has an impedance of 4 6 Z j l
    12·1 answer
  • Are routers better for internet connection rather than a WiFi modem?
    6·2 answers
  • Which technical planning document defines support tasks?
    7·1 answer
  • A _______ contact allows current to flow when the switch's operator is not activated.?
    6·1 answer
  • What is the volume of the rectangular prism shown.
    9·1 answer
  • At the coast on a summer day, the land is hotter than the ocean. Warm air over the land rises and is replaced by cooler air, cau
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!