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[TECHNOLOGY] · Mexico · 6 sources

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UNAM launches Es-Pumita soap made from used cooking oil

Students and researcher Alejandra Chávez Riveros at the Universidad Nacional Autónoma de México (UNAM) have developed Es‑Pumita, a biodegradable liquid soap created from used cooking oil collected from campus cafeterias. The team gathers about 20 liters of oil each week, filters and cleans it, then saponifies the oil with caustic soda or potassium hydroxide. The process yields six to ten liters of soap per batch, whose active ingredient is the fatty‑acid salts produced by saponification, complemented by glycerin, EDTA, vitamin E and essences, giving the product high biodegradability.

Es‑Pumita is currently used as a pilot in the restrooms of Campus II of the Faculty of Higher Studies Zaragoza (FES‑Zaragoza). The project aims to expand the soap’s use to Campus I and eventually other university facilities, reducing the risk that a single liter of discarded oil could contaminate up to 40 000 liters of water and cause drainage blockages. The soap is trademark‑registered and presented as a practical example of green chemistry and circular economy.

Entities

Agustín Reyo Herrera · Alejandra Chávez Riveros · Es‑Pumita · Faculty of Higher Studies Zaragoza (FES Zaragoza) · Universidad Nacional Autónoma de México (UNAM) · nutrient‑rich beer

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