Using Probiotics to Generate Clean H2O
Michelle Vu
David Thompson Secondary
Floor Location : M 016 V

The use of probiotics has increased significantly in the last few years. From prescription medication to daily vitamins, many people purchase these medications that claim to grow "beneficial" bacteria in the human gut. The two most popular species of probiotics found in daily supplements are Bifidobacterium and Lactobacillus. Scientists are still working to find the truth about the effects and side effects of probiotics on humans.
After reading the effects of probiotics in finfish aquaculture systems, a question sparked. Can probiotics increase the cleaning efficiency in Daphnia magna to clean polluted bodies of water? Due to the fact that many alternative water cleaning systems can be inefficient to clean medium to large bodies of water (i.e. planting plants to help filter the water) the method being researched and tested in this project is predicted to be more efficient.
The procedure of the project can be summarized in a few steps. The probiotic strain (Bifidobacterium infantis 35624) will be inserted into fresh spring water where five Daphnia magna have inhabited. Then, every 24 hours, a spectrophometer will be used to calculate the optical density of the water. This will be repeated until all the specimens have died.
It was found that once D. magna was exposed to B. infantis 35624, the cleaning rate was increased significantly. In the future, more experiments will be conducted to continue trying to find the most time and cost-efficient way of cleaning large quantities of water to produce drinkable water.