Question

how can the process of sedimentation be used while cleaning food at home

Answer 1

put the foodstuff in water, if the foodstuff is heavier than the unwanted particles allow it to settle down. after the food particles settle down remove the water

Answer 2

Put the food grains in the clean water container, the impurities which are lighter will float on water surface and the food grains will settle down, remove the impurities floating on water and then collect the cleaned food grains. By this process the food grains are cleaned at home.