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Geography Human Alevel > ✅CASE STUDY - Semakau Landfill > Flashcards

✅CASE STUDY - Semakau Landfill Flashcards

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1
Q

Where is Semakau Landfill?

A

Singapore

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2
Q

What is the population of Singapore?

A

5.6 milion

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3
Q

Why are such large amounts of waste produced?

A

Due to the urban nature of the entire country

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4
Q

How has waste output increased?

A

From 1260 tonnes per day in 1970 to 8559 tonnes per day in 2016, a 6 fold increase

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5
Q

How much of its waste does Singapore recycle?

A

More than half

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6
Q

What waste disposal method has Singapore adopted?

A

Waste-to-energy as it incinerates rubbish to generate electricity

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7
Q

How much does incineration reduce the volume of waste by?

A

90%

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8
Q

Where is the 10% of non-combustible waste and ash sent?

A

To the Semakau Landfill

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9
Q

Why is Semakau unique?

A

It is Singapore’s only landfill

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10
Q

How are environmental impacts reduced at the incineration plants?

A

They are fitted with electrostatic precipitators, lime injectors and fabric filters to treat and clean flue gas from the combustion process

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11
Q

What is heat from incineration used for?

A

Generating steam in boilers, which drive turbines and produce electricity

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12
Q

How much electricity was generated by incineration plants in 2005?

A

938,000MWh

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13
Q

What area does the landfill cover?

A

350 hectares

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14
Q

What capacity does the landfill have?

A

63 million m3

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15
Q

How was the landfill created?

A

The island was dug out with a 7km perimeter embankment

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16
Q

What was the embankment lined with?

A

An impermeable membrane to prevent leachate entering the sea

17
Q

What happens to leachate generated at the plant?

A

It is treated in a dedicated leachate treatment plant to national discharge standards, and the effluent is discharged into the sea

18
Q

What happened in July 2005?

A

The landfill was opened for recreational activities and now receives thousands of visitors

19
Q

What was planted around the island?

A

13.6 hectares of mangroves to replace those uprooted during the construction of the landfill

20
Q

What is located around the perimeter bund of the island?

A

A network of monitoring wells to indicate pollution should there be a leak in the impermeable membrane

21
Q

How do the mangroves aid the island?

A

They act as secondary indicators of pollution should there be a leak

22
Q

What happens when the landfill cell is filled to ground level?

A

It is covered with earth and grass to allow a new ecosystem to thrive

Geography Human Alevel (61 decks)

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