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Worksheets02 WPT Flotation
Total questions: 10
Worksheet time: 3mins
Flotation is a unit operation used to separate solid or liquid particles from a liquid phase.
True
False
In wastewater treatment, flotation is used principally to ___ and ___.
remove suspended matter
concentrate biosolids
remove settleable matter
concentrate bioliquids
Which are flotation mechanism?
Introducing fine gas bubbles into the solid phase.
Introducing fine gas bubbles into the liquid phase.
The bubbles attach to the particulate matter
The particulate matter attach to the bubbles
Buoyant force of the combined particle and gas bubble cause them to rise to the surface
What is the principal advantages of flotation over sedimentation?
Light particles that settle slowly can be removed more completely and in shorter time.
Light particles that settle slowly can be removed more completely and in longer time.
Heavy particles that settle slowly can be removed more completely and in shorter time.
Heavy particles that settle slowly can be removed more completely and in longer time.
What is this?
Dispersed-air flotation
Dissolved-air flotation
Displaced-air flotation
Dissoluted-air flotation
What is this?
Dispersed-air flotation
Dissolved-air flotation
Displaced-air flotation
Dissoluted-air flotation
Which are inorganic chemical commonly used to aid flotation process?
Aluminium salts
Ferric salts
Activated silica
Strong acid
Strong base
Factors that must be considered in the design of flotation units include:
concentration of particulate matter
quantity of particulate matter used
particle-rise velocity
solids loading rate
liquids loading rate
For system in which all the flow is pressurized, the equation relates the A/S ratio and 3 factors, i.e:
the solubility of air
the solubility of solid
the operating pressure
the concentration of solids
the concentration of airs
Which is pressurized recycle in the equation above?
R
Q
Sa
P
