[Gasification] [Digestion] [Stoves] [biochar] Orange Peels

[Tom Miles]

Crispin,

 

AD responded right away on June 24 in the digestion list: 

 

"Dear Tom,

the peels can be charred in a charring kiln of the TLUD as well as of the
oven and retort type. If the essential oil has been extracted from the peel,
it can serve as feedstock in a biogas plant, but if the essential oil has
not been extracted, I don't think that the peel could be digested in a
biogas plant as the sole substrate, because the essential oil in the peel
may kill the methanogens. But mixed with other material, it can be digested.
One would have to conduct experiments to find out the correct ratio of peel
to other substances.

Yours

A.D.Karve"

 

His comments regarding digestion were confirmed by others on the digestion
list. 

 

Tom

 

 

 

 

From: digestion-bounces at lists.bioenergylists.org
[mailto:digestion-bounces at lists.bioenergylists.org] On Behalf Of Crispin
Pemberton-Pigott
Sent: Friday, June 24, 2011 8:32 AM
To: 'Discussion of biomass cooking stoves'; biochar at yahoogroups.com; AD
Karve
Cc: 'Discussion of biomass pyrolysis and gasification'; 'For Discussion of
Anaerobic Digestion'
Subject: Re: [Digestion] [Stoves] [biochar] Orange Peels

 

Dear Tom

 

We did not hear from Dr AD Karve on this. I wonder if a pure orange peel
diet would affect his small sucrose/starch biogas digester?

 

Regards

Crispin

 

 

From: stoves-bounces at lists.bioenergylists.org
[mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of Tom Miles
Sent: 24 June 2011 09:40
To: 'Discussion of biomass cooking stoves'; biochar at yahoogroups.com
Cc: 'Discussion of biomass pyrolysis and gasification'; 'For Discussion of
Anaerobic Digestion'
Subject: Re: [Stoves] [biochar] Orange Peels

 

All,

 

Many thanks for the all of the generous suggestions regarding orange peels.
We'll compile them and put them on the websites while we determine what is
most suitable for the particular application in Southern Africa. 

 

I have to admit that when I last looked at a pile of orange peels (in
Brazil) I wasn't thinking of how they could be used. It certainly looks like
at sufficient scale the limonene may be worth recovering.  At smaller scales
management (rotting) or use (briquetting, drying, charring) of the peel also
seems to have potential. Pigs and chickens would also probably recycle the
peel, or make enough of a mess to be incorporated in compost or soil.
Feeding to birds with char is not high on my list unless there is a health
benefit. Usually the object is to increase weight gain my increasing intake
rather than reduce intake with a low density material like char.  

 

Regards,

 

Tom  

 

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