Waste Management Practices in Singapore

Singapore generated 16.3 billion pounds of solid waste in 2022, with nearly half ending up in its only landfill, Semakau, which is nearing capacity. To address this, Singapore employs incineration, converting waste to energy and reducing landfill waste to 3%. The process generates electricity for 240,000 households but also produces ash, which is transported to Semakau. Environmental measures are in place to prevent contamination. With the landfill projected to fill by 2035, Singapore aims to increase recycling rates and explore recycling incinerated ash. The government is working with universities to find sustainable solutions.

What is the projected year by which Semakau Landfill will be completely filled?

• 2030

• 2045

• 2035

• 2040

What percentage of Singapore's waste is recycled according to the NEA?

• 55%

• 60%

• 42%

• 70%

How many active waste-to-energy plants are there in Singapore?

• Three

• Five

• Two

• Four

What is the temperature reached by the incinerators in Singapore's waste-to-energy plants?

• 2200 degrees Fahrenheit

• 2000 degrees Fahrenheit

• 1800 degrees Fahrenheit

• 1500 degrees Fahrenheit

What percentage of the original waste volume is left as ash after incineration?

• 15%

• 20%

• 10%

• 5%

How long does it take to transport ash from Tuas Marine Transfer Station to Semakau?

• Five hours

• Four hours

• Three hours

• Two hours

What is used to prevent leachate from contaminating the sea at Semakau Landfill?

• A sand barrier

• An impermeable membrane

• A metal fence

• A concrete wall

What is one of the future strategies Singapore is considering for managing incinerated bottom ash?

• Dumping it in the ocean

• Burying it in new landfills

• Using it in road construction

• Exporting it to other countries

What is the target recycling rate Singapore aims to achieve by 2030?

• 60%

• 65%

• 70%

• 75%

What percentage of items placed in recycling bins cannot be recycled due to contamination?

• 45%

• 40%

• 35%

• 30%