Phosphorus Release from Sewage Sludge Incinerator Ash in a Corn and Soybean Field Study

In the Twin Cities, sewage sludge is incinerated and in the process 5 MW of power is generated per day.  Incineration produces significant amounts of ash (38 tons/day) which contains nearly 30% total phosphate (P2O5).  Currently, sewage sludge incinerator ash (SSA) is landfilled at a cost to taxpayers, but previous studies have shown that the ash has the potential to be a source of phosphorus (P) for crop production.  

Ron Sheffield Memorial Student Poster Competition Winners

The Waste to Worth conference hosts a student poster competition – open to graduate and undergraduate students.

2017 – Cary, North Carolina

  • Erin Stevens University of Nebraska-Lincoln
  • Allison Deviney NC State University,
  • Linda Schott, University of Nebraska-Lincoln. 

student poster winnters 2017 waste to worth conference

L to R: Tommy Bass, Erin Stevens, Allison Deviney, Linda Schott

2015 – Seattle

  • First: Laura Kenny, Rutgers University
  • Second: George Neerackal, Washington State University
  • Third: Nicole Schuster, University of Nebraska – Lincoln

student poster winners 2015 waste to worth conference

L to R: George Neerackal, Laura Kenny, Nicole Schuster

2013 – Denver

  • First: Kira Shonkwiler, Colorado State
  • Second: Fei Sun, Washington State
  • Third: Kelsey Bruning, Iowa State

student poster winners 2013 waste to worth conference

L to R: Julianna Sheffield, Kelsey Bruning, Fei Sun, Kira Shonkwiler…

What Are the Clean Water Act Requirements That Apply to Animal Agriculture?

Home | Trends | Manure ManagementNutrients | Water Quality | Clean Water Act (You are here) | Stewardship | Conservation | Conservation Practices

A Brief Overview of the Clean Water Act National Pollutant Discharge Elimination System (NPDES) Requirements for Concentrated Animal Feeding Operations

Farms classified as concentrated animal feeding operations (CAFOs) are subject to National Pollutant Discharge Elimination System (NPDES) permitting under the Clean Water Act (CWA) because they are, by definition, “point sources” of pollution.…

Planning for Stewardship

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Managing manure as a beneficial resource involves:

Building on the previous sections in this module, this section focuses on tools and resources for managing manure-related risks and highlights strategies for good stewardship.…