Modeling A Wastewater Plant

1
Modeling A Wastewater Plant
2
The Purpose

• Where does the water you use go?
• The waste water from your shower, toilets, sinks,
  etc. and the water from businesses like
  restaurants must be cleaned and treated before
  you can put it back into a river and lake and
  reuse the water. This treatment is performed at a
  wastewater or sewage plant.

3
Beginning Process

• The incoming water is first measured and and is
  directed to the Metal Inlet Screen
• This screen removes large solids while the water
  proceeds to the Grit Channels
• Here the water is run through channels allowing
  the grit to
  settle to the bottom

4
Primary Treatment

• The water is sent to large chambers, called
  clarifiers, where the organic material settles to
  the bottom of the plant
• The water is now directed into aeration basins
  where bacteria eat the many tiny particles
  present
• After a second round in the clarifiers, the water
  is chemically treated with
  chlorine then released
  back into river or
  lake.

5
Treating SLUDGE

• A by-product of the clarification process is a
  clump of organic material called Sludge.
• This sludge is fermented, thickened, and then
  partially digested by bacteria.
• After this treatment, the sludge can be used as
  fertilizer or burned.

6
Creating A Model

• What are the three main portions?
• Inflow of Water
• Treatment of Water
• Treatment of Sludge

7
Creating Water Inflow Model

• Variables
• Housing Apartments, Neighborhoods, etc.
• Businesses Restaurants, Stores, etc.
• Rainfall Daily Rain or Storms

8
Basic Flow Pattern

• Decide the names of each stock

9
Decide Which Variables To Add

• Examples for the Business Stock
• What Businesses are there?
• Examples for the Housing Stock
• How many people live in the area?
• Other Variables Needed?

10
Online Research

• Go Online to find the information you need for
  you model to be accurate
• How many gallons per day do people use?
• How much water do restaurants use?
• What is the rainfall for your area?

11
Finish Your Water Inflow Model

• Run your Model and see if the results obtained
  are reasonable

12
Creating A User Interface

• For an easier way to view data and run your
  model, an Interface is necessary
• At the top level you can add sliders and buttons
  to simplify your model for others
• Graphs can also be pinned on to this area

13
Objects in the Interface

• We will be adding several objects to our
  interface
• First, pin down your graph
• Second, add a run button
• Finally, create sliders for your variables

14
The Full Wastewater Model

• Now that you have created a small portion of the
  wastewater model, we are going to look at a Full
  model of a Wastewater Plant