“With energy production and raw material shortages becoming increasingly pertinent issues around the world, designer Peter Trimble has demonstrated a radical method of manufacture that addresses both issues. Dupe is a portable machine that uses a mixture of sand, bacteria and urine to create a material called biostone. The machine is a proof-of-concept design only and is currently set up to create a small stool, but the method can be adapted to create just about anything.

The procedure for creating biostone involves filling a mold of the final required shape with sand before pumping a bacteria solution of bascillus pasterurii (which has been grown in a nutrient broth) into the mold and leaving the mixture to establish itself overnight. A solution of calcium chloride, urea and nutrient broth is then pumped into the mold. The bacteria uses the urea as energy to absorb the calcium chloride and convert it into calcium carbonate, a cement-like mixture that binds the sand together within the mold.”

More at the source: Gizmag
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