11/28/2025
Mezcal producer Serafin Morales Cruz from San Dionisio Ocotepec, Oaxaca, wants to transform the way his community handles vinazas, the liquid byproduct of Mezcal distillation.
Serafin is a third-generation producer and Alarii is his brand, born from two families united by their passion for agave and respect for their Zapotec roots. Interested in using resources responsibly and respecting the land, Serafin shares the concern of many habitants in San Dionisio Ocotepec: increased pollution in their water due to mismanagement of vinazas.
Serafin approached SACRED with the proposal to build a bio-digester — a living system of microorganisms that turns waste into clean energy and natural fertilizer.
Every liter of mezcal produced generates between 10 and 15 liters of vinazas, a dark, acidic liquid loaded with organic matter, ethanol residues, and heavy metals. In Oaxaca alone, where hundreds of small distilleries operate, thousands of cubic meters of untreated vinazas are often released into streams and soil where they deplete oxygen, alter pH levels, and devastate local ecosystems. Studies have shown that these discharges can reduce soil fertility, pollute groundwater, and create foul odors that affect nearby communities.
But what if waste could be reborn as a resource? That’s the promise of the bio-digester Serafin envisions. Inside the bio-digester, a carefully balanced community of anaerobic bacteria —microbes that thrive without oxygen — will feed on the vinazas. As they break down the organic material, they will generate two valuable products:
• Bio-gas, a renewable source of energy that can replace firewood or fossil fuels used in the distillation process, and
• Bio-fertilizer, a nutrient-rich effluent that restores soil health, supports agave cultivation, and closes the production loop.
With your support, Serafin will incorporate the bio-digester in Alarii’s production process and welcome other producers in the community to bring their vinazas to the bio-digester and receive fertilizer in return.
Will you support him in transforming Mezcal’s environmental footprint into a kinder, more productive model? waste-into-fuel.org