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Water Treatment and Dams
Terms in this set (13)
How many stages are involved in treating drinking water?
1. Screening 5. Sedimentation
2. Aeration 6. Filtration
3. PH Correction 7. Disinfection
4. Flocculation 8. PH Adjustment
What is the first stage of treating drinking water?
Screening- The removal of any coarse floating objects, weeds, etc. from the water.
What is the second stage to treating drinking water?
Aeration- Dissolving oxygen into the water to remove smell/taste and promote helpful bacteria to grow.
Aerobic: O2 Anaerobic: Doesn't require O2
*Slow or rapid filtration (depends on size of plant/volume of water)
*Sand is used as the filter
Water is treated with a powerful oxidizing agent, usually chlorine.
So that treated water leaves the plant in the designed range of 6.5 to 8.5 PH units.
The Clean Water Act
The Clean Water Act of 1972 regulates the discharges of pollutants in the US rivers and streams.
The Safe Drinking Water Act
Established to protect the quality of drinking water in the U.S.
*Water treatment plants
What are some ways to conserve water?
*Repair leaking faucets
*Landscape with plants that use little water
*Use drip irrigation in your yard and crops
*Use water saving toilets, shower-heads, and dishwashers
*Reuse water for houses and gardens (rain barrels)
Stored water is used to turn a turbine which powers a generator that provides electricity to the area.
Pros of using hydroelectric power
*Safer than nuclear power and fossil fuels
Cons of using hydroelectric power
*Increases soil erosion
*Negative effects for wildlife-fish especially
*Energy production depends on how much water is available (not constant)
The most famous dams in the world
*Three Gorges Dam- China
*Hoover Dam- United States
*Glen Canyon Dam- United States
*Aswan Dam- Egypt
*Itaipu Dam- Brazil
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