What does landfill gas contain Mcq?

What does landfill gas contain?

Landfill gas contains many different gases. Methane and carbon dioxide make up 90 to 98% of landfill gas. The remaining 2 to 10% includes nitrogen, oxygen, ammonia, sulfides, hydrogen and various other gases. Landfill gases are produced when bacteria break down organic waste.

Which of the following gas is produced from landfill waste Mcq?

18. Which of the following gas can be produced from landfill wastes? Answer: (a) Biogas.

What gases does landfill release?

Methane and carbon dioxide make up approximately 99 per cent of the volume of landfill gas, while the remaining one per cent is made up of over 500 trace components (Environment Agency, 20021) such as hydrogen sulphide and ethanethiol produced when there is microbial breakdown of waste.

What is landfill gas called?

Landfill gas (LFG) is a natural byproduct of the decomposition of organic material in landfills. LFG is composed of roughly 50 percent methane (the primary component of natural gas), 50 percent carbon dioxide (CO2) and a small amount of non-methane organic compounds.

Which two main gases are produced from landfill gas or biogas?

The major components are CO2 and methane, both of which are greenhouse gas.

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What can be produced from landfill waste?

How is landfill gas produced?

Table 2-1: Typical Landfill Gas Components
Component Percent by Volume
methane 45–60
carbon dioxide 40–60
nitrogen 2–5

What is the purpose of EA Mcq?

Explanation: The purpose of EA is to determine and analyse the possible impacts on the environment due to the actions of proposed project and also to suggest alternatives, if available. 12.

How many types of landfills are there Mcq?

8. How many types of landfills are there? Explanation: They are sanitary landfills, controlled dumps and bioreactor landfills.

What is landfill pollution?

Landfills emit landfill gas that consists mostly of methane and carbon dioxide, with small amounts of volatile organic compounds from the bacterial decomposition of organic materials. Methane and carbon dioxide are both greenhouse gases, and methane is toxic and explosive in large concentrations.

How is landfill gas collected?

Landfill gas collection is typically accomplished through the installation of wells installed vertically and/or horizontally in the waste mass. … Landfill gas can also be extracted through horizontal trenches instead of vertical wells. Both systems are effective at collecting.

What causes methane gas in landfills?

Landfills emit methane when organic wastes such as food scraps, wood and paper decompose.