taking place at Eyebeam
in New York City from March 13 to April 19 aims to raise awareness about the role your body (or more specifically, its waste) plays in the water system. To illustrate the potential for using properly treated urine—a sterile liquid—as a fertilizer for plants, Urine to Fertilizer DIY Kits
will be available at the installation. How does the kit work?
Users will test their urine before the reaction. Then, they will add an enzyme, wait for their urine to hydrolyze, and then add Magnesium Chloride. A sediment will build up at the bottom of the jar. Using a filter, they will pour off and flush the liquid, leaving the fertilizer in the jar. They can add water and the seeds included in the kit to grow their own watercress hydroponically in the glass container used for the reaction.
For more information about treating urine to extract its nutrients, read this press release from EAWAG (Swiss Federal Institute of Aquatic Science and Technology). [via Cool Hunting]