[Stoves] Fwd: Legacy Foundation: User filled in Contact Us form!

[Kevin]

Dear Andrew

----- Original Message ----- 
From: "Andrew C. Parker" <acparker at xmission.com>
To: "Discussion of biomass cooking stoves" <stoves at lists.bioenergylists.org>
Sent: Friday, May 17, 2013 1:54 PM
Subject: Re: [Stoves] Fwd: Legacy Foundation: User filled in Contact Us form!


> Kevin,
> 
> The cut flower industry uses prodigious amounts of insecticides,  
> fungicides, herbicides, etc.  I would imagine that the green waste from  
> such an operation would not be healthy to feed to cattle or any other  
> animal.

# The insecticides, fungicides, and herbicides could very well be the problem.
 
  I don't know that it would be good to burn it either.  Any ideas  
> on how to deactivate (inexpensively) these chemicals so that the waste can  
> be safely utilized for compost, fodder or fuel?

# Such "pesticides" are often chemicals that contain chlorine. Burning them would produce a smoke containing dioxins. Such pesticides may block the Composting process by killing the compost organisms.

# What about the possibility of 
1: Air dry the green waste to about 15% moisture content
2: Gasify the dried biomass
3: Cool the gases to about 250 F to 300 F, to allow re-formation of dioxins.
4: Filter the gasifier gas output through a bed of char, to capture any residual dioxins

# Output products could be as follows:
1: A clean and safe fuel gas
2: Some clean char, suitable for garden use
3: A Waste Stream of char, contaminated with dioxins that could be treated further for dioxin destruction.

This would be a costly process, but at least it has the potential to eliminate the Community health hazard.

Best wishes,

Kevin


> 
> 
> On Fri, 17 May 2013 09:19:09 -0600, Kevin <kchisholm at ca.inter.net> wrote:
> 
>> Dear Richard
>>
>> What is in the "green waste" that "causes health problems to society"?
>>
> 
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