CRP Composting & Organics Recycling 2

Question 1

What is vermicomposting?

Accepted Answer

The use of worms to decompose organic waste into nutrient-rich castings

Answer

High-temperature composting using enclosed vessels

Answer

Anaerobic digestion of food waste in sealed tanks

Answer

Composting performed outdoors in wind-exposed rows

Question 2

What is the primary greenhouse gas concern associated with organic waste disposed in landfills?

Accepted Answer

Methane generated from anaerobic decomposition

Answer

Carbon dioxide from aerobic surface decomposition

Answer

Nitrous oxide from nitrogen-rich food waste

Answer

Hydrogen sulfide from protein-containing materials

Question 3

How does an 'aerated static pile' (ASP) composting system supply oxygen to the composting mass?

Accepted Answer

Perforated pipes connected to blowers force or draw air through a stationary pile

Answer

A mechanical turner regularly mixes and aerates the pile

Answer

Workers manually insert aeration probes into the pile daily

Answer

A sealed tarp with vented holes allows passive air exchange

Question 4

Which of the following is a common contaminant found in residential curbside organics collection programs?

Accepted Answer

Plastic bags used to line collection containers

Answer

Coffee grounds and paper filters

Answer

Vegetable peels and fruit cores

Answer

Yard trimmings with woody stems

Question 5

What is the primary purpose of the 'curing' phase at the conclusion of the active composting process?

Accepted Answer

To allow continued stabilization and maturation of the compost product

Answer

To raise temperature one final time for additional pathogen kill

Answer

To add nutrients and soil amendments to enhance product quality

Answer

To reduce moisture content to a target level before screening

Question 6

What does the US Composting Council's Seal of Testing Assurance (STA) program provide to compost producers?

Accepted Answer

Verification that compost products meet quality standards through independent laboratory testing

Answer

Certification that facilities comply with all EPA permitting requirements

Answer

A federal government endorsement for commercial compost sales

Answer

Liability insurance coverage for compost facility operators

Question 7

According to EPA estimates, approximately what percentage of the US municipal solid waste (MSW) stream consists of organic material that could be composted?

Accepted Answer

30–35%

Answer

10–15%

Answer

20–25%

Answer

45–50%