Thermal Waste Treatment Quiz

What are the aims of WtE-processes?

• Expansion of waste characteristics

• Promotion of harmful substances

• Increase in water content

• Volume reduction

When was the first waste incineration plant opened in Germany?

• 1896

• 2010

• 1874

• 2000

What is the main part of a rotary kiln used for incineration?

• Steam generator

• Fluidised bed reactor

• Cylindrical furnace

• Grate firing system

What is the advantage of fluidised bed reactors in terms of NOx emissions?

• No data available

• Lower emissions due to low temperatures

• Higher emissions due to high temperatures

• No effect on emissions

Which technology is the most common for grate firing systems?

• Reverse acting grates

• Horizontal grates

• Reciprocating grates

• Roller grates

What is the typical temperature range for pyrolysis in incineration?

• 200 - 500°C

• 150°C - 900°C

• 60 - 200°C

• 500 - 2000°C

What is the energy efficiency range for grate firing systems?

• Around 50%

• Around 20%

• Around 80%

• Around 100%

What is the concept for the use of energy in thermal waste treatment?

• Conversion to gas

• Superheating of steam

• Cooling of steam

• Conversion to electricity

What is the main aim of the WtE-processes?

• Expansion of waste characteristics

• Promotion of harmful substances

• Destruction of hazardous organic compounds

• Increase in water content

What is the main disadvantage of rotary kilns in incineration?

• Low gas temperatures

• Easy energy recovery

• Low efficiency of energy recovery

• NOx-Emissions caused by high temperatures