The Fertilizer We Flush Away | Margaret Lumley, Roca Water

<p>Why do we make nitrogen fertilizer, let some of its value end up in wastewater, spend effort removing it, and then manufacture more?</p><p><br /></p><p>Margaret Lumley, Founder &amp; CEO of Roca Water, joins Bite-Size Climate Tech to explain how battery-inspired electrodes can selectively recover ammonium from wastewater. Together we follow nitrogen through food and water systems, search for an eight-year-old-friendly soup analogy, and explore why resource recovery might make commercial sense for wastewater operators. Margaret also shares what growing up with California droughts and later experiencing Wisconsin floods taught her about water and climate.</p><p><br /></p><p>Recorded on 6 August 2026. Company milestones are discussed as they stood at recording.</p><p><br /></p><p><br />Bite-Size Climate Tech makes complex climate solutions simple, human, and engaging.Support Season 5:https://www.dayzeroproduction.com/bite-size-climate-tech/supportLearn more about Bite-Size Climate Tech:https://www.dayzeroproduction.com/bite-size-climate-techProduced by Day Zero Production</p>