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Project title Reducing nitrate levels in water with denitrifying bacteria Featured science projectScience project video
Difficulty Level High school
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This science fair project was conducted to ascertain the effect of introducing denitrifying bacteria to water contaminated with nitrates.  

Instructions preview
1. For this experiment, the independent variable is the introduction of denitrifying bacteria. The dependent variable is the concentration of nitrate in the water. This is determined by testing the water using the nitrate test kit. The constants (control variables) are the size of the water sample, the amount of the denitrifying bacteria present in each water sample and the temperature of the environment, which will remain at room temperature. 2. Label each of the beakers Bacteria 1, Bacteria 2, Bacteria 3, None 1, None 2 and None 3. Measure and pour about 300ml of pond water into each .....
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