[Digestion] Digestion Digest, Vol 10, Issue 16

Tue Jun 21 21:05:01 CDT 2011

Thnaks All for your feedback 

Juna, you metioned CNG home filling system - can you elborate - companys -
make model -etc  
Bill 

-----Original Message-----
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Sent: Wednesday, 22 June 2011 7:00 a.m.
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Subject: Digestion Digest, Vol 10, Issue 16

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Today's Topics:

   1. Re: biogas compression (bingham)
   2. Small Scale Farm Digesters (M Bywater)
   3. Re: Small Scale Farm Digesters (David Fulford)

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Message: 1
Date: Mon, 20 Jun 2011 16:07:47 -0700
From: "bingham" <bingham at zekes.com>
To: "For Discussion of Anaerobic Digestion"
	<digestion at lists.bioenergylists.org>
Subject: Re: [Digestion] biogas compression
Message-ID: <26F74F1534D5485EA0EBEDC44900C49F at Portable>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
	reply-type=original

We have tried several different types of non CNG compressors.
Many contain brass and copper components which fail relatively fast unless
you remove the H2S. The seals begin to leak or already did leak which
finally set off our gas detectors. We used several different types of tanks 
and most
started to rust or corrode, inside in a very short time.

We found a government surplus CO2 compressor that had a U frame explosion
proof motor and wiring. It came with Several CO2 tanks we mounted in some
farm vehicles with some success.

Unless you are using free energy to compress the methane it is was not cost 
effective for
us. We will use it if there is a fuel supply disruption but we fill there 
are a lot of potential
problems with the life expectancy of the CNG tanks. There are composite 
tanks that are
nonmetallic but they are costly.
Brent
----- Original Message ----- 
From: <juha.luostarinen at metener.fi>
To: "For Discussion of Anaerobic Digestion" 
<digestion at lists.bioenergylists.org>
Sent: Monday, June 20, 2011 4:12 AM
Subject: Re: [Digestion] biogas compression

Dear Bill,

With dive compressors problem may be that there is no circulation of by-pass

gas from pistons and crankshaft chamber to gas inlet. This may cause methane

slip to atmosphere and possibly risk of explosion.

I would recommend to have look on compressors for CNG home filling, some of 
them are in same price range as dive compressors, and they are designed for 
flammable gases.

Best Wishes,

Juha
________________________________________
L?hett?j?: digestion-bounces at lists.bioenergylists.org 
[digestion-bounces at lists.bioenergylists.org] käyttäjän Bill 
Rucks [water.alchemy.ltd at clear.net.nz] puolesta
L?hetetty: 20. kes?kuuta 2011 0:25
Vastaanottaja: digestion at lists.bioenergylists.org
Aihe: Re: [Digestion] biogas compression

Greetings all
I would like some feed back/ideas/experience on the use of "Dive
compressors" and filling air bottles with compressed biogas- to have other
equipment running on the gas externally.
Help

Bill Rucks

-----Original Message-----
From: digestion-bounces at lists.bioenergylists.org
[mailto:digestion-bounces at lists.bioenergylists.org] On Behalf Of
digestion-request at lists.bioenergylists.org
Sent: Sunday, 19 June 2011 7:00 a.m.
To: digestion at lists.bioenergylists.org
Subject: Digestion Digest, Vol 10, Issue 14

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Today's Topics:

   1. US Visitor to UK (Steven Bolgiano)

----------------------------------------------------------------------

Message: 1
Date: Fri, 17 Jun 2011 15:50:51 -0400
From: Steven Bolgiano <steven at planetfound.com>
To: digestion at lists.bioenergylists.org
Subject: [Digestion] US Visitor to UK
Message-ID: <4DFBB01B.7060800 at planetfound.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi Group,
I just found out that one of our group is going to be in London
available all day Sunday, and available some parts of the day Monday,
and Tuesday.
He is even newer to AD than myself, ... and he is leaving the technical
and scientific learning curve up to me. But here at home he has been
involved in community / regional development with various utilities,
waste water treatment projects, etc. And he would like to speak to
persons about the commercial opportunity side of AD (agriculture /
poultry / fertilizer byproducts), or at least models that sustain
themselves through utilizing those resources produced.
Any info on this will be welcome. The specific focus of our project is
small to mid sized poultry farmers, using batch digester bladder tanks.
However any info or conversations would be wonderful.

He's a great guy, and will be an interesting person to meet.

If anyone would be available to meet with him that would be fantastic.
Contact me steven at planetfound.com if there is a possible opportunity.

Cheers!
Steven

--
Steven Bolgiano
Executive Director
Planet Foundation Ltd.
443.235.1344

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for more information about digestion, see
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
and the Biogas Wiki http://biogas.wikispaces.com/

End of Digestion Digest, Vol 10, Issue 14
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for more information about digestion, see
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
and the Biogas Wiki http://biogas.wikispaces.com/

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to UNSUBSCRIBE or Change your List Settings use the web page
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for more information about digestion, see
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
and the Biogas Wiki http://biogas.wikispaces.com/

------------------------------

Message: 2
Date: Tue, 21 Jun 2011 02:50:32 +0100
From: M Bywater <hotwaterweb at hotmail.co.uk>
To: <digestion at lists.bioenergylists.org>
Subject: [Digestion] Small Scale Farm Digesters
Message-ID: <BLU150-w31AFAA1ADBC0C84978E3A2E4510 at phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"

Hi, 

It has taken some time for me to post this, but here is the Royal
Agricultural Society of England's (RASE) report on small scale UK on-farm
digesters that we talked about earlier this year. There is a long version
which contains all the case studies (
http://www.rase.org.uk/what-we-do/core-purpose-agricultural-work/AD-Full-Rep
ort.pdf ) and a shorter version which talks about barriers and benefits (
http://www.rase.org.uk/what-we-do/core-purpose-agricultural-work/AD-Short-Re
port.pdf )

Several of the AD systems proved particularly interesting. One was a
self-built system which topped up the digester heat using thermal solar. The
farm was a virtual showpiece for renewable energy, having solar PV, ground
source heat pump, a wind turbine, thermal solar and  a digester! (Case study
10.4)

A second, which had been running for more than two years, had automated
de-gritting, so that cows could be bedded on sand or ash. It used a very low
parasitic load on the mixing (typically about 1W/m3) and had an elevated
belt press separator. (Case study 10.5)

A third had a three-tank system which produced wonderful digestate and did
gas scrubbing in a covered post-store. (Case study 10.9)

I hope those of you who were interested in the report enjoy reading it as
much as I enjoyed talking to the farmers and putting it together!

Kind regards,

Angie Bywater

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Message: 3
Date: Tue, 21 Jun 2011 08:37:26 +0100
From: "David Fulford" <davidf at kingdombio.com>
To: digestion at lists.bioenergylists.org, "M Bywater"
	<hotwaterweb at hotmail.co.uk>
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to UNSUBSCRIBE or Change your List Settings use the web page
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for more information about digestion, see
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
and the Biogas Wiki http://biogas.wikispaces.com/

End of Digestion Digest, Vol 10, Issue 16
*****************************************