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Webinars and Videos

Webinars and Videos

Webinars and Videos

The Sustainable Phosphorus Alliance hosts on important phosphorus management issues. Our members participate in the webinars and the phosphorus sustainability community is invited to attend.

In addition, we create video abstracts of phosphorus sustainability research that has been published recently in respected, peer-reviewed journals through our series The video abstracts are 5- to 10-minutes long and the researchers present their own findings.

Most Recent Webinar

Upcycling Phosphorus for Agricultural Use

The term “upcycling” describes transforming wastes or otherwise low-value products into more valuable products, particularly those of higher environmental value. The upcycling of phosphorus from effluent, biosolids, and manures can yield various types of fertilizers for crops, thereby closing the loop on the nutrient cycle. These products may offer substantial advantages–agronomic, environmental, regulatory–over simply applying the wastes from which they were derived to plants.

In this webinar, we will discuss three such products with their purveyors and ask about the challenges to producing the products, their appropriate uses, their agronomic and environmental benefits, their comparability to more traditional products, and the regulatory complexity surrounding their use.


  • Molly Biedenfeld from Ostara
  • Marla Buchanan from Green Technologies
  • Dr. Tony Daniels, representing Midwestern Bioag


Other Webinar Videos

Webinar – Regulation of Biosolids and Manure Land Application

In the US, there is substantial state-by-state diversity in the rules for when, where, and how nutrients can be recycled through land application of biosolids and manure. This regulation impacts the recycling of nutrients in the food system, including phosphorus.

The Sustainable Phosphorus Alliance is reaching the culmination of a comparative analysis on state regulations of land application of biosolids and manure. The information is being rendered as text reports and as an online, ArcGIS Story Map.

On September 25, the Sustainable Phosphorus Alliance held a 90-minute webinar with an introduction to the reports and a demonstration some features of the ArcGIS tool.


  • Dr. Rebecca Muenich, the Sustainable Phosphorus Alliance
  • Dr. Matt Scholz the Sustainable Phosphorus Alliance


Webinar – Phosphorus Recovery from Water Resource Recovery Facilities

Materials that were traditionally characterized as waste are often replete with commodities ready to be extracted and valorized. A number of companies have seized upon this opportunity and developed technologies that advance this beneficial reuse of phosphorus.

On May 24, the Sustainable Phosphorus Alliance held a 90-minute webinar with a discussion of the challenges and opportunities in harvesting phosphorus resources from wastewater streams.


  • Matt Kuzma of Ostara Nutrient Recovery Technologies
  • Jeff Dawson of Renewable Nutrients
  • Mike Dougherty of Lystek International
  • Jordan Lind of CLEARAS Water Recovery


The Vermont Phosphorus Innovation Challenge

As with so many states, Vermont has witnessed the effects of phosphorus pollution on its waters, particularly visible as algal blooms on Lake Champlain. In response, the state government has launched the Vermont Phosphorus Innovation Challenge (VPIC) to incentivize the development and implementation of technologies that target reducing phosphorus loads that stem from the management of animal and human wastes.

From 27 applicants, VPIC has recently chosen six technologies to receive various amounts of seed funding, each toward piloting their technologies. At this webinar, we heard from VPIC organizers and from the developers of three of those technologies.


  • Kaitlin Hayes from the State of Vermont
  • Jim Jutras from the Village of Essex Junction (working alongside Raju Badireddy from the University of Vermont)
  • Mike Curtis from DVO, Inc. (working alongside Eric Roy from the University of Vermont)
  • Bobby Levine from Digested Organics


Video Interviews – Phosphorus Science Now!

Dr. Matt Scholz of the Sustainable Phosphorus Alliance has conducted interviews with scientists about their work in phosphorus sustainability. Learn about their findings in these videos:

Watershed Buffering Capacity for Phosphorus
Dr. Jean-Olivier Goyette of the University of Montreal speaks about his 2019 paper in Nature Geoscience entitled “Low Buffering Capacity and Slow Recovery of Anthropogenic Phosphorus Pollution in Watersheds”

Dr. Jean-Olivier Goyette of the University of Montreal

The Role of Silicon in Soil Phosphorus Mobilization
Dr. Joerg Schaller of University of Bayreuth in Germany speaks about his 2019 paper in Scientific Reports entitled “Silicon increases the phosphorus availability of Arctic soils”

Dr. Joerg Schaller of University of Bayreuth

Roadmap for Nutrient Recovery from Digested Waste
Dr. Céline Vaneeckhaute from Université Laval discusses her 2018 Waste Management paper “Nutrient recovery from digested waste: Towards a generic roadmap for setting up an optimal treatment train”

Dr. Céline Vaneeckhaute from Université Laval