The container stored at 34 °C will produce the most methane gas.

Dairy waste treatment

Dairy waste can be treated in anaerobic lagoons, which provide treatment of the animal waste with minimal release of odor. These anaerobic lagoons are also able to decompose more organic material in per unit volume as compared to aerobic lagoons.
The advantages of an anaerobic lagoon are that animal manure can be handled by hydraulics using flushing systems, pumps and sewer pipes. The amount of odor released is much less, while the level of nitrogen in the manure is also lower. The lagoon also provides long-term storage for these wastes, with very little cost incurred. However, the disadvantage of using an anaerobic lagoon is the public perception that it is a tank of manure. Some odor may be released at certain times of the year during seasonal changes. The lack of nitrogen will also limit the use of the manure as a fertilizer.

The lagoon should ideally be located in lower grounds compared to the source of the waste, so that gravity can be used to flush the waste into the lagoon. Clay soil is the most economical and suitable for the construction of the lagoon.
 

The hypothesis that the container stored at 34 °C will produce the most methane gas has been proven to be true.

Methane gas is obtained from the manure of animals when anaerobic decomposition of the manure takes place in the absence of oxygen. The methane gas can be used as a source of fuel for cooking stoves or to power a generator to produce electricity. The combination of carbon dioxide and methane is called biogas and is also a source of renewable energy.

Some power and gas companies in the United States, such as Pacific Gas and Electric and BioEnergy Solutions have commenced production of renewable energy using animal waste. Their biogas-to-pipeline injection project in Fresno County is an example of this advancement in energy production.

 

Try to repeat the experiment using rotting vegetables or other organic material.