I read with great interest the PDF,even downloaded it to add to my reference library.
I may have miss-read, but in the beginning it read more like he was looking for a way to help the land, which it will certainly do.
The by-product of this is usable heat and later usable gas.
Like Tom and Old_F I've also dabbled into the world of processing this stuff :=)
Al Rutan and the guy from Britain, "chicken manure to fuel guy" were the ones I most read as they were all about using what they had and making the most of it.
I agree, the neat part about using digesters is that you can build and use according to what you have on-hand or are driven by your needs.
Willib: The website has a ton of other stuff too. I may send an email asking about a few others items they have. The unit they have looks to be built based on ease of use as well.
Continuous use units do need a stirrer of some sorts if you're going to be "producing" for a long period of time.
I use compost for my garden I have several piles going at any one time, but due to my city location, I have to keep them in covered units. The stuff coming out is very nice, make the tomatoes go even during cold weather, right up til hard frost, also keeps me from filling the refuse containers.
I had not tired soaking like Jean did, I may give that a try on a new pile see how it goes. I do know that there is heat in there, the old place where I could pile the stuff as high as I wanted always seems to have steam vapors coming off it during cold/wet days.
The other by-products of using any form of digester is there is less stuff going to the trash pile and a healthier top-soil, win - win to me. If there's a little gas to be used for a BBQ grill or to heat your coffee/tea mores the better.
Willib: let us know how your setup goes, pic too if ya got'em
Cheers;
Bruce