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Project title The effect of temperature on dairy waste decomposition and the production of methane gasFeatured science projectScience project video
Difficulty Level High school
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This experiment was performed to compare the effect of temperature on the anaerobic decomposition of bovine manure to produce methane gas. The experiment was conducted by keeping cow manure in sealed containers and storing them at temperatures of 14 °C, 24 °C and 34 °C, and comparing the amounts of methane gas produced. 

Instructions preview
1. For this experiment, the independent variable is the temperature at which the manure in the flasks is kept – at 14 °C, 24 °C and 34 °C. The dependent variable is the amount of methane gas collected in the measuring cylinder. This is determined by observing and taking the measurement of the gas level from the cylinder every day. The constants (control variables) are the amount of cow manure and the size of the Erlenmeyer flask used. 2. Using the nail, make a hole in the middle of each of the 3 corks. The hole should be just .....
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