Card Set Information
envs348 sait clt2
What is LS and how does it work?
Removes hardness by precipitating it out of solution
Three reactions used in lime softening
What process is used to remove permanent hardness?
Cold Lime Softening
Warm Lime Softening
Hot Lime Softening
How do you remove silica from water?
MagOx process. Add MgO to LS unit, silica will become trapped in heavy sludge blanket
How does IX work?
Water passes through a packed cartridge that replaces hard ions with soft ions
Types of ion exchange resins
Classes of ion exchange resins
-SAC (Strong acid cation)
-WAC (Weak acid cation)
-SBA (Strong base anion)
WBA (Weak base anion)
How does RO work?
Pressure is applied to the concentrated water, which is then forced through a membrane. Contaminents are left behind.
Pore size - determines which TDS can be removed by RO
Flow rates - lower flow rates more efficient
Pressure - variable depending on application/membrane
Surface area - bigger SA is more efficient
In what order are these units placed in a water treatment plant?