WASTE MANAGEMENT QUIZ 14

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Question 1:

Which of the following statement is incorrect?

With decrease of temperature, production of landfill gas increases

Landfill gas can be toxic and it can lead to global warming

Landfill gas contains a high percentage of methane due to the anaerobic decomposition of organic matter

The more organic waste present in a landfill, the more landfill gas is produced

Which of the following statement is incorrect?

Biomethanation is ideal for wet organic wastes

Energy generation, the produced biogas can be used for cooking or for the production of electricity and heat.

Biogas may also be cleaned by removing CO2 and H2S.

Biomethanation also leads to increased landfill requirement

Nitrifying bacteria works better when

DO is less than 1 mg/L

DO is greater than 2 mg/L

DO is negative

DO is zero

Which of the following statement is incorrect?

Most microorganisms do well in a pH environment between 6.0 and 9.0.

Microorganisms' growth and reaction rates are faster at cold temperatures.

Microorganisms need trace nutrients such as nitrogen, phosphorus, and some metals for their metabolism

The ratio of BOD to nitrogen (N) to phosphorus (P) should be at least 100:5:1.

Which of the following is NOT the non-recyclable waste?

Thermocoal

Paper

Wax boxes

Garbage