Desila... what?
How does it work?
The bad news is...
Did you know...?
100
Desalination is this.
What is a way of making salty water into fresh water (drinkable)?
100
The two most practical ways of desalination.
What is distillation and the membrane process?
100
The three most important topics to be considered with desalination.
What is energy, cost, and environmental impact?
100
____ amount of salt in ocean water.
What is 35,000 ppm?
200
Desalination is used here. (be specific, the world will NOT count)
What is especially in dry countries, on ships, and small islands?
200
Distillation is ______________.
What is evaporating water, then collecting its vapors.
200
The energy needed for RO is dependant on this.
What is how salty the water is. (its salinity)
200
Specifics for 2002: (choose one of the two choices): # of plants and # of countries OR amount of freshwater and % of total world consumption.
What is 12,500 desalination plants in 120 countries, which produce 14 million m3/day of freshwater, which is less than 1% of total world consumption?
300
The type of water that has from 3000 ppm to 10000 ppm of salt.
What is moderately saline water?
300
The membrane process uses this.
What is a synthetic membrane with tiny pores that allows water to pass through.
300
The cost of a plant is dependent on this. (1 of 2 answers)
What is site or size of plant.
300
2 most important users of desalinated water.
What is Middle East and North Africa?
400
An example of distillation.
Sample answer: What is evaporation, condensation, and precipitation of water on earth? (water vapour into clouds into rain)
400
The salt concentration in the waste varies from...
What is double of the source water to a solid salt product.
500
A common pre-treatment step for RO.
What is coagulation, filtration, or microfiltration? (RO = reverse osmosis)
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