From researching, fertilizing coffee grounds requires yeast to grow on coffee grounds with substances like water and sugar to help it grow. Our team is dedicated to designing a way to fertilize coffee grounds using materials that normal people can access. For example, water, sugar, and everyday drinks containing yeast. Our objective procedure is easy, basically just put everything together, stir, and leave it there for the yeast to grow. For drying the coffee grounds for further uses, place the coffee grounds on a tray and bake.

Trial 3:
100 g coffee grounds
10 g of water
10 g of sugar
20 g of 養樂多

7 days, mold appears. Failed