Waste Flashcards
1
Q
Define waste
A
an object the holder discards, intends to discard or is required to discard
2
Q
Where in the chain is waste generated?
A
- mining
- industry
- transport
- consumption
- waste management
3
Q
Neg/pos value of waste
A
Waste may have a negative value
* i.e. you must pay a price to dispose of it
It may also have a positive value
* e.g., waste metal, waste paper
Its value may also be artificial
* for instance, due to taxes and subsidies
4
Q
Define the pathways of waste
A
- sold to interested parties
- returned, with deposit, for reuse/recycling
- returned, without deposit, for reuse/recycling
- collected for processing/recycling/dump
- passed to a friend
- stored in a hibernating stock
- squandered as litter
5
Q
What is the problem with waste?
A
- there is a lot of it
- it occupies a lot of space
- it must be moved to other places
- it can be hazardous
- it contains valuable materials
–> Not treating it creates problems, treating it creates other problems
6
Q
Types of waste
A
- gaseous
- liquid
- solid
- toxic
- radioactive * organic
- biomedical * e-waste
- valuable
7
Q
Municipal waste
A
- landfill
- incineration (with or without energy recovery)
- recycling (with varying quality levels)
8
Q
Solid waste
A
- separation at source
- separation at treatment plant
- recycling
- energy recovery
- landfill
9
Q
WWTP (Wastewater treatment plan)
A
- removing nutrients
- removing toxics and pharmaceuticals
10
Q
Waste is not just trash, it is business
A
- the service of handling
- the service of neutralizing
- the content of materials
- the energetic value
11
Q
Define E-Waste
A
- WEEE (waste electrical and electronic equipment)
- deserves special attention
- rapidly increasing
- often badly managed
- contains dangerous materials
- contains valuable materials
–> often exported to poor countries
12
Q
Huge recycling potential
A
- gold
- silver
- palladium
- copper
- nickel
- aluminium
