CPWM Landfill Gas Management and Energy Recovery

Question 1

What are the two primary components of landfill gas (LFG)?

Accepted Answer

Methane and carbon dioxide

Answer

Nitrogen and oxygen

Answer

Hydrogen sulfide and ammonia

Answer

Carbon monoxide and water vapor

Question 2

Under the Clean Air Act, which regulatory standard specifically governs MSW landfill air emissions requiring gas collection and control systems?

Accepted Answer

New Source Performance Standards (NSPS) under 40 CFR Part 60

Answer

RCRA Subtitle D regulations

Answer

National Emission Standards for Hazardous Air Pollutants under 40 CFR Part 61

Answer

Clean Water Act Section 402 permits

Question 3

At what volume concentration of methane in ambient air does the lower explosive limit (LEL) become a safety concern?

Accepted Answer

5% methane by volume

Answer

1% methane by volume

Answer

15% methane by volume

Answer

25% methane by volume

Question 4

What biological process is primarily responsible for landfill gas production in a sanitary landfill?

Accepted Answer

Anaerobic biodegradation of organic waste

Answer

Aerobic biodegradation of organic waste

Answer

Chemical oxidation of inorganic materials

Answer

Photodegradation of plastic waste

Question 5

Which type of landfill gas combustion device most effectively controls trace organic compound emissions?

Accepted Answer

Enclosed ground flare

Answer

Open candlestick flare

Answer

Pipe stack flare

Answer

Portable thermal oxidizer

Question 6

What is the approximate energy content (BTU/scf) of typical landfill gas containing approximately 50% methane?

Accepted Answer

450–550 BTU/scf

Answer

100–200 BTU/scf

Answer

250–350 BTU/scf

Answer

700–800 BTU/scf

Question 7

Which voluntary EPA program specifically promotes the development of landfill gas energy recovery projects?

Accepted Answer

Landfill Methane Outreach Program (LMOP)

Answer

ENERGY STAR Program

Answer

Green Power Partnership

Answer

WasteWise Program