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What happens to particles strained out mechanically by the filtering medium?
What happens to particles strained out mechanically by the filtering medium?
What is the main purpose of the process mentioned in the content?
What is the main purpose of the process mentioned in the content?
What is the mechanism by which particles smaller than the pore size are removed from the solution?
What is the mechanism by which particles smaller than the pore size are removed from the solution?
What happens to many particles during the process?
What happens to many particles during the process?
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What is the result of particles being trapped within the filter by chance contact?
What is the result of particles being trapped within the filter by chance contact?
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What is the term for the process by which particles are mechanically strained out by the filtering medium?
What is the term for the process by which particles are mechanically strained out by the filtering medium?
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What is NOT a stage of the process mentioned in the content?
What is NOT a stage of the process mentioned in the content?
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What is the outcome of the process described in the content?
What is the outcome of the process described in the content?
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What happens to particles that are larger than the pore size of the filter?
What happens to particles that are larger than the pore size of the filter?
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What is the focus of the process described in the content?
What is the focus of the process described in the content?
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What happens to particles as they pass by the filter?
What happens to particles as they pass by the filter?
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What is the term for the process of particles becoming attached to the surface of the filter?
What is the term for the process of particles becoming attached to the surface of the filter?
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What is the location where particles become attached during the adhesion process?
What is the location where particles become attached during the adhesion process?
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What is the result of adhesion in the context of filtration?
What is the result of adhesion in the context of filtration?
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When does adhesion occur in the filtration process?
When does adhesion occur in the filtration process?
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What is the process referred to as when it occurs within the pores?
What is the process referred to as when it occurs within the pores?
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What happens to the flocs after they are formed within the pores?
What happens to the flocs after they are formed within the pores?
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What is the term for the process of removing flocs from the pores?
What is the term for the process of removing flocs from the pores?
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What is the purpose of floculation in pores?
What is the purpose of floculation in pores?
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What is the result of floculation within the pores?
What is the result of floculation within the pores?
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What is the primary function of depth filtration?
What is the primary function of depth filtration?
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What type of filter media is commonly used in depth filtration?
What type of filter media is commonly used in depth filtration?
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What is the term for the rate at which water flows through a filter?
What is the term for the rate at which water flows through a filter?
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What is the purpose of backwashing a filter?
What is the purpose of backwashing a filter?
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What is the term for the process by which suspended solids are removed from water?
What is the term for the process by which suspended solids are removed from water?
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What type of filter media is characterized by its high surface area and adsorption properties?
What type of filter media is characterized by its high surface area and adsorption properties?
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What is the term for the layer of filter media that has been expanded or lifted during backwashing?
What is the term for the layer of filter media that has been expanded or lifted during backwashing?
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What is the term for the primary mechanisms by which suspended solids are removed from water?
What is the term for the primary mechanisms by which suspended solids are removed from water?
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Study Notes
Depth Filtration
- Depth filtration is a process that removes suspended solids and particulate matter from water by passing it through a layer or bed of granular material, such as sand.
- The filter medium has pores that trap particles, and the process involves mechanical straining, chance contact, adhesion, and flocculation.
Mechanisms of Particle Removal
- Mechanical straining: particles larger than the pore size are strained out mechanically.
- Chance contact: particles smaller than the pore size are trapped within the filter by chance contact.
- Adhesion: particles become attached to the surface of the filter as they pass by.
- Flocculation: particles can aggregate and form flocs within the pores, which are then removed by one of the mechanisms.
Types of Filters
- Silica sand filters
- Anthracite filters
- Diatomaceous earth filters
- Metallic mesh filters (e.g., stainless steel mesh filter)
Filtration Rate (Loading Rate)
- The filtration rate is the rate of water flow applied per unit area of the filter.
- It is the velocity of water approaching the filter interface.
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Description
This quiz covers the mechanisms of filtration, including the straining out of particles and chance contact. Learn about the different ways particles are trapped within a filter.
