Low-cost, manual centrifuge for separation of particles from water

Water separation is a critical process with far-reaching implications for the environment, public health, and various industries. Traditional water filtration methods are often limited to commercial use, posing challenges for individuals lacking access to clean water, or the equipment to separate particles suspended in water. In this study, we developed a spinning device for water separation through centrifugal and rotation force. Our goal was to create a device that could provide a low-cost alternative for removing contaminants from water. During the testing, we found that the device had a theoretical efficiency of 67% and longer separation times consistently produced significantly lower absorbance values in the visible range, indicating more effective particle removal. A computational model was also used to simulate the movement of particles under the influence of rotational forces, and showed that the smallest particle in this experiment (microplastics) can be theoretically moved by the rotational forces. This study underscores the promise of a manually powered spinning toy as an innovative and efficient tool for water separation and contaminant removal, holding the potential to address global water quality challenges.