Module 1: Paper Pulping and Floatation De-Inking Students use a home blender to create a homogeneous suspension of paper pulp. The process of removing ink contaminants makes use of the hydrophobic properties of ink pigments. To accomplish the de-inking step, the pulp is added to a large flask with deionized water. Upon addition of dish soap, the mixture is aerated through a tube connected to an air outlet so that bubbles form in the solution. The hydrophobic soap bubble attracts the ink particles and carries them out of the flask into a waste basin (Figure si in the Supporting Information). Students then vacuum filter and oven-dry the de- inked pulp, and obtain yield from the original 16 a paper Module 2: Enzymatic Digestion