Plastic Waste to Soil Wealth: A Microbial Makeover with Sam Baker

In this episode of Mulch Matters, we sit down with Sam Baker, CEO of Wriggle Brew, for a compelling conversation that bridges soil science, sustainability, and the future of plastic waste management. What began as a quest to develop organic fertilizers using earthworms evolved into a groundbreaking exploration of how larval microbes can digest plastic - offering a novel, biologically driven solution to one of the planet's most pressing environmental challenges. Sam shares the origin story of his work, from his background in chemistry and economics to the moment a fishing trip with his grandfather sparked a mission to combat fertilizer runoff and soil degradation. Through trial, error, and innovation, his team discovered that certain worm species and their gut microbes could not only process food and farm waste into nutrient-rich vermicompost, but also break down polystyrene and other plastics. This led to the development of a bioreactor system capable of converting plastic into microbe-ready material, ultimately producing shelf-stable, microplastic-free organic fertilizer. The conversation dives deep into the science behind pyrolysis, microbial digestion, and the challenges of scaling up this technology. Sam also reflects on the importance of affordability in sustainable innovation, arguing that eco-friendly solutions must be accessible to truly make an impact. This episode offers a rare glimpse into the intersection of agricultural innovation, plastic recycling, and environmental entrepreneurship - highlighting how worms and waste might just hold the key to a more regenerative future. This work is supported by Specialty Crops Research Initiative Award 2022-51181-38325 from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed on this podcast are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture. Note: intro and outro music credit to Zakhar Valaha from Pixabay https://pixabay.com/music/introoutro-motivational-ident-main-9923/