How can be marble used in a sustainable way?

KES 57 is a filter and mineraliser for rainwater. It is structurally divisible into two parts. The first, the upper one, serves as a filter. Two trays function as containers for rough marble stones or processing waste. The two trays contain stones of different sizes, larger at the top and smaller at the bottom, so as to obstruct the passage of external bodies inside the drum. The second part of the drum serves as a mineraliser. At the bottom rests fine marble waste and dust, which, in continuous contact with the water, mixes with it. The mineralised water acquires calcium carbonate (CaCO3), which changes the PH, giving the rainwater enhanced qualities for irrigation. Less water can be used, and more efficiently when needed. The mineralised water can be extracted from the bottom of the drum through the faucet. The entire project (outer drum and trays) was realised using recycled drums, used for storing ink and destined for landfill. The base created is intended as an example and is not a crucial part of the design choice. The latter remains with the users who, depending on their needs, can improvise one to their liking.