Anaeorbic Digesters using Horse Manure

by Karen Hedlund
(Vashon, WA, USA)

Who has experience using Anaerobic Digesters with horse manure? I live in a rural area surrounded by small horse barns (6 horse or more, about 30 horses in a 2 mile radius). I'm trying to figure out the feasibility of a centralized AD system for the manure from these animals? How do you prepare the manure to put into the digester? How is it loaded into the AD? How is the effluent separated out into liquid and solid? Thank you for any input.

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Oct 22, 2011
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I am doing the same thing
by: Anonymous

I am working on this for a large equestrian facility. I am using a local university Energy Club and they are taking it on. I would contact the Idaho National Lab - they are doing it on a large scale for dairy farms and they have offered to help me figure out how to do it with horse manure. I am just getting started! Good luck!

Mar 04, 2010
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Answer
by: Anonymous

Refer article "Inspiring Alternative Energy Project" in same..Those guys know where you're at.

Jan 21, 2010
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Digesters
by: Anonymous

Anaerobic digesters are just that. A closed vessel to catch the generated methane that comes from the natural digestion of the material.
There are various ways of doing the operation but the best always include adding heat to the digester material.
Waste treatment plants do this primarily with steam generated from the burning of some of the waste gas. You can also do it with solar lenses and other heat sources on smaller scales.
Nothing says you have to add heat, it just works faster if you do.
With only 30 horses there won't be that much usable waste unless you collect it routinely and keep adding to the mix.
There were some sites that dealt with this a few years ago that might give you a better idea of what is involved on a small scale, if they are still on the net.
A good source might be your state EPA or environmental department.
You might check with your local Ag Dept also as there are many farmers who do this sort of thing with fairly large herds of dairy and feed lot cattle.
The nice thing about it is that everything is usable after it's treated.

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