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Digester meets the needs of a community PDF Print E-mail
Dairy basics - Manure
Written by PD Editor Karen Lee   
Wednesday, 15 May 2013 10:32

When a manure spill resulted in a large fish kill, officials in Dane County wanted to be able to address the issue of manure and water quality without hindering the dairy industry. A public/private partnership led to the creation of a community digester in Waunakee, Wisconsin.
Read more...
 
Up to 30 percent more biogas? Yes, by separating hydrolysis PDF Print E-mail
Dairy basics - Manure
Written by Sylke Chesterfield   
Wednesday, 15 May 2013 10:00

Anaerobic digestion is a natural process where solids are broken down into a slurry and gases in an oxygen-free environment. In nature, this continually happens on the floors of bodies of water.

Similarly, a cow’s digestive system turns feedstocks into manure and biogas, a methane-containing gas that is expelled into the atmosphere.

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Three dairies convert to closed-loop sand recovery systems PDF Print E-mail
Dairy basics - Manure
Written by PD Editor Karen Lee   
Thursday, 14 March 2013 10:14

0513pd_leesand_1Manure systems have certainly evolved over time – from pitching stalls to extracting dischargeable water. They vary depending on bedding type, performance and desired end products.

Producers choosing to use sand for bedding have seen a variety of options to reclaim the sand. One of the most popular systems Bob Komro with Komro Sales & Service, Inc. has been building thus far is the flush flume, closed-loop system.

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Why conserve nutrients? PDF Print E-mail
Dairy basics - Manure
Written by Doug VanOrnum   
Thursday, 14 March 2013 08:35

Imagine what our landscape must have looked like, not really all that long ago. Tens of millions of bison roamed the American plains in clusters so large one could have seen them from space.

These immense, grand herds would devastate each valley they came through. A flowering meadow would turn into a moonscape overnight. If a valley was lucky, it would see a full year or more before the bison returned, so it could attempt to recover from such an onslaught.

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Second time around: quality of your recycled bedding sand PDF Print E-mail
Dairy basics - Manure
Written by Andrew Wedel   
Thursday, 14 March 2013 07:47

Question: What is the purpose of freestall bedding? Answer: To provide a cow a clean, dry resting surface.

Especially, this means creating an environment where exposure of teat ends to attack from mastitis-causing pathogens is minimized. Veterinarians and your family doctor alike will tell you: Minimize exposure to minimize infection rates.

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Compost adds diversity, solutions for Rosenholm-Wolfe Dairy PDF Print E-mail
Dairy basics - Manure
Written by PD Editor Karen Lee   
Wednesday, 13 March 2013 15:45

Along the banks of the Mississippi River in the driftless area of western Wisconsin lies Buffalo County. It is home to valleys of unsurpassed fertility, bordered by towering bluffs on all sides.

Nestled in Waumandee Valley is Rosenholm-Wolfe Dairy LLP, a 550-cow and 500-head youngstock operation.

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Understanding pump performance curves PDF Print E-mail
Dairy basics - Manure
Written by Nancy Puck   

022813_curveAs we plan a pumping system to move liquid on a farm, we must know what the capabilities of our pump are, and what the friction losses in our system will be.

This is an overview of pump capabilities as detailed on the pump's performance curve.

On one axis of the pump curve, you will find capacity, and on the other, total dynamic head (TDH). Capacity is measured in U.S. gallons per minute or cubic liters per hour.
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Finding the right effluent pump PDF Print E-mail
Dairy basics - Manure
Written by Dan Huyser   

Dairies have effluent in many places. Manure pits, parlor water, effluent from settling basins and runoff are common sources.   

There are several things to consider when selecting a pump. One of the first is finding a pump that will handle the pressure and head from the effluent lines. The higher the elevation is that the effluent has to be pumped, the higher the head pressure.
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