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New Option For Managing Manure

Date:
November 26, 2007
Source:
US Department of Agriculture
Summary:
A typical 1,000-head beef feedlot produces up to 280 tons of manure in just one week. That's a lot of manure--and for hundreds of U.S. cattle feedlots, disposal is an important management issue. Scientists have now developed and tested a new method of runoff control.
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The water on the left collected in a solids-separation basin at the low end of the feedlot pen (on the right) after a rain. After the solids settle, the water in the basin will be distributed throughout the vegetative treatment area.
Credit: Photo by Stephen Ausmus

A typical 1,000-head beef feedlot produces up to 280 tons of manure in just one week. That's a lot of manure—and for hundreds of U.S. cattle feedlots, disposal is an important management issue.

Fortunately, Agricultural Research Service (ARS) scientists in the Environmental Management Research Unit at the U.S. Meat Animal Research Center (USMARC) at Clay Center, Neb., have developed and tested a new method of runoff control.

In the United States, feedlot runoff is often stored in a large pond or basin. From there, it is either distributed as nutrient-rich irrigation water or processed for safe disposal. This method is approved by U.S. Environmental Protection Agency, but is far from perfect. Over time, nutrients can percolate through the soil into groundwater. Also, pond maintenance is expensive and difficult.

Research leader John Nienaber worked with agricultural engineers Roger Eigenberg and Bryan Woodbury to design an alternative system, in which runoff containing manure solids enters temporary storage basins at the base of the sloped feedlot.

The basin is large enough to hold runoff for several hours to allow the solid waste to settle to the bottom. The remaining liquid is then drained through distribution tubes that provide even dispersal over a grassy field or "vegetative treatment area" (VTA).

The VTA system, conditionally approved by EPA, has many benefits. It requires minimal management, significantly reduces waste storage time, eliminates the need for costly runoff pumping, and removes standing water.

This manure-disposal technology could also be applied to other livestock. The system should be less expensive to construct and maintain than the traditional system, though the cost and suitability would vary with topography, climate and animal type.


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Materials provided by US Department of Agriculture. Note: Content may be edited for style and length.


Cite This Page:

US Department of Agriculture. "New Option For Managing Manure." ScienceDaily. ScienceDaily, 26 November 2007. <www.sciencedaily.com/releases/2007/11/071126153250.htm>.
US Department of Agriculture. (2007, November 26). New Option For Managing Manure. ScienceDaily. Retrieved May 7, 2017 from www.sciencedaily.com/releases/2007/11/071126153250.htm
US Department of Agriculture. "New Option For Managing Manure." ScienceDaily. www.sciencedaily.com/releases/2007/11/071126153250.htm (accessed May 7, 2017).