[Gasification] gasifier type updarft use rice husk
mark at ludlow.com
Sat Dec 17 21:25:47 CST 2011
There's a lot of different opinions on the value/harm of the "tars" in the
soil. My instinct says "no-no!" but some people drink the distillate and
think that it is God's blessing!
If we observe natural phenomena, for instance forest burns (which,
presumably, have multiple regimens of combustion, from hardly-at-all to pure
ash) we see that there is usually a strong recovery after a burn, but the
ecosystems are usually not replaced, intact, but forced to begin their long,
progressive cycle once again.
A study of 19th-century charcoal kilns in the Eastern U.S., show that there
is a lasting effect on the sites on which they were located. On the other
hand, many suggest that the aromatic compounds produced during pyrolytic
combustion are valuable components of the signaling network that tells seeds
and the soil ecosystem that the sky has opened and that the system has an
altered competitive structure.
Maybe a little is good; and a lot is bad. But despite the evidence that many
of the polyaromatic hydrocarbons remaining in the char produced for biochar
applications is carcinogenic, some certifying bodies have declared it
"Organic" and suitable for unrestricted use in agricultural applications.
From: gasification-bounces at lists.bioenergylists.org
[mailto:gasification-bounces at lists.bioenergylists.org] On Behalf Of Jeff
Sent: Saturday, December 17, 2011 6:18 PM
To: Discussion of biomass pyrolysis and gasification
Subject: Re: [Gasification] gasifier type updarft use rice husk
On Sat, 2011-12-17 at 09:43 -0500, Thomas Reed wrote:
> including an open PYROMID, and any junk biomass, we all have easy
> access to as much charcoal as we could ever need, for the first time
> in history.
This summer I tried numerous switchgrass bale PYROMID's with no practical
charcoal production but it did make some impressive and scary fires.
Personally I would be reluctant to promote this just because of the danger
of starting forest fires and what not.
> So we really have no excuse for cleaning up TLUD gas if we wish to.
As long as we don't place the tar laden charcoal in the soil but use it as a
fuel. In other words clean charcoal added into the soil is much better that
adding charcoal that was used to filter toxic waste.
> Compare to natural gas at 1000 Btu/ scf.
Locally the troops have landed and marcellus shale gas is under production.
It's been stated that this type of well will last for 30 to
50 years and beneath that even more gas. Already, locally, the price of
natural gas has dropped.
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