[Gasification] Small steam systems plus gasifiers for electricity
jeffdavis0124 at gmail.com
Sat Dec 7 14:15:07 CST 2013
I never had any luck carbonizing grass/weeds with the grass-a-fire. One
would rat hole and the other needed denser charcoal bed. But Roger
Sampson rice husk method showed hope.
Working full time makes it unreliable to harvest dry grass/weeds late in
the season at least for this bag of old achy bones. In other words it's
not an easy fuel for a peasant. The baler went to the sale a bit ago and
the mower and rake goes this spring. But I now have an old and almost
functioning flail harvester that should work for compost production.
I hope to start phasing out grasses with Staghorn Sumac a much more
On 12/02/2013 11:39 PM, Tom Miles wrote:
> We find that biochar from a downdraft gasifier composted 15% v/v with
> alfalfa and wood chips makes a very nice compost. We have used it as a
> substitute for a vermiculite-peat-bark blend. Tree seedling response
> is generally good. Some species are pH sensitive and the alfalfa
> pushes the compost pH up so adjustments need to be made. In Japan Dr.
> Ogawa rinses high pH grass (bamboo) chars to reduce soluble alkali
> before application to the tree root zone.
> Biochar-peat and biochar--coco peat blends work well.
> So if you have a gasifier in a location where there is no market for
> power you can make heat for greenhouses and a char byproduct that you
> can compost for use in the greenhouse. We estimate that the combined
> savings from the heat (propane) and soil amendments for a 10 MMBtuh (3
> MW) system are about $350,000 per year.
> David Yarrow likes chars from grasses. You can make char in your
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