| Abstract |
| In this study, UFBs of less than 100nm size were generated by using GoodSam-UFB generator(made by S company) that generates UFBs through Cavitation technique. The generated UFB was directly applied to the strawberry cultivation process to monitor strawberry fruit productivity. In addition, the efficiency of E. coli removal in water by strong oxidizers such as OH radicals produced by UFB was evaluated. As a result, when the aqueous nutrient solution with UFBs was supplied to the strawberry medium, it had a slightly higher initial concentration compared to the nutrient solution prepared with general groundwater at a concentration of about 9mg/L and did not decrease significantly over time. In addition, it was found that the concentration of dissolved oxygen was kept high. In other words, it is easy to supply dissolved oxygen to help root growth in the early stage of strawberry growth, thereby promoting the growth of strawberries. After feeding the nutrient solution for the growth of strawberries, the nitrate concentration of the discharged nutrient solution was analyzed. As a result, dissolved oxygen contained in aqueous nutrient solution with UFBs helped the nitrate to be smoothly taken from the soil. Therefore, the concentration of nitrate in the effluent was reduced, hence strawberry growth was promoted. As a result of the E. coli removal test, aqueous solution with UFBs showed very high E. coli removal efficiency compared to the commercially available antibacterial agent. These results can be explained by the strong oxidizers included in the UFB water. |
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| Key Words |
| Cavitation, E. coli removal, Strawberry growth, Ultra fine bubbles(UFBs) |
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