Demonstration problem #1
The Removal of Nickel using the OLI/StreamAnalyzer
Nickel, a trace heavy metal ion, is removed from a stream through precipitation. The introduction of cyanide significantly alters the treatment strategy.
In the application, a wastewater contains nickel ion at a concentration of 0.002 moles/Kg H2O. An existing treatmentstrategy precipitates the nickel ion as Nickel Hydroxide (Ni(OH)2). The design specification for soluble nickel remaining after precipitation is less than 1 ppm. During the course the plant operation, cyanide ion is inadvertently added to the waste stream. The soluble nickel is now in excess of 1ppm. Sulfide salts were considered to precipitate the nickel and once again achieve the designspecification. This tour illustrates the steps necessary to analyze this application in great detail. As it turns out, the sulfide treatment considered is not enough to get the wastewater within the design specification. The power of OLI/StreamAnalyzer becomes apparent as we study the chemistry of the individual streams involved.
OLI, Value Through Technology OLI Systems, Inc
108 American Road MorrisPlains, NJ 07950
www. olisystems. com
In this tour, and all subsequent tours, when action is required by the user, the instruction will be in Bold and Italic type. When you are referred to a feature on a screen, the information will be Bold and underlined. Any mouse clicks are left-mouse button clicks unless otherwise noted. This is summarized below:
TypeFace Bold and Italic Bold and Underlined Click Right-Click User Action The user is required to enter this information The user is directed to look for this feature in the program windows Left-mouse button Right-mouse button
The Tour Starts Here
We begin by starting the OLI/StreamAnalyzer Program. This may be accomplished by clicking the StreamAnalyzer icon or by using the Start button andfinding the StreamAnalyzer under Program. Once started, the OLI Splash screen will display.
Figure 1 The OLI Splash Screen
After a few moments, the main OLI/StreamAnalyzer welcome screen will display.
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Figure 2 The StreamAnalyzer Welcome Screen
We need to define the wastewater stream.
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Scenario 1: Wastewater with out additives
Step 1: Add the Stream Click the Add New Stream icon. Click the Explorer tab. This will display the stream definition windows.
Figure 3 Stream Explorer View
We should add some descriptive information about this stream so we can later identify the stream.
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Step 2: Addingdefinitions Click the Description tab. This will display the description information
Figure 4 the Stream Description tab
It is advisable to change the name of the stream from the default name. You may be entering many streams and will need to sort them out at a later time.
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Step 3: Enter Stream Names and Definition Replace the name Stream1with the name Nickel Waste. Add to the description box: Nickel waste water The filled out windows will look like the following figure:
Figure 5 The filled out description window
Click on the Definition Tab
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Step 4: Enter component inflows Click in the white box in the grid below the Inflows line. Add the formula Ni(OH)2 Click in thewhite box next to the species you just entered and enter the value 0.002 Press the to update the list.
Figure 6 The stream Definition Tab
After entering the values, the grid should look like the following:
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Figure 7 The filled out grid, notice the name Ni(OH)2 changed
The OLI/StreamAnalyzer will automatically change the name...