C10 Flashcards
What is portable water ?
Water safe to drink
Best way to collect water ?
In the ground , lakes and rivers
Process of collecting water ?
Collect water
storage
screening
remove particles
final treatment
water received
How can water be purified ?
Reverse osmosis or evaporation
What is reverse osmosis ?
Passes impure water through a semi - permeable membrane at a high pressure to remove infirmities
Sewage ?
require removal of organic matter and harmful microbes
Industrial waste can produce harmful chemicals
How people remove waste ?
Screening and grit removal
Sedimentation to produce sewage sludge and effluent
Anaerobic digestion of sewage sludge
Aerobic biological treatment of effluent
What is bioteaching ?
Uses bacteria to produce leachate solutions that contain metal compounds
Processed to obtain the metal
How do you recycle Metals ?
Melting and recasting
How to recycle glass ?
Crush , melt , reform
How to recycle steel ?
added to blast furnace
How to recycle plastic ?
Recycled not very easily
often recycled into lower grade plastics
What is the life cycle assessment ?
The environmental impact of products in each of the stages
Extracting and processing
Manufacturing and packaging
use and operation
Disposal