[Digestion] Digestion Digest, Vol 7, Issue 1

Bill Rucks water.alchemy.ltd at clear.net.nz
Tue Mar 1 14:44:34 CST 2011


Greetings guys
I thank you for the Report on the disaster in Thailand - it is always good
to no when these types of things happen !!


Bill Rucks 

Water Alchemy ltd - New Zealand 

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Subject: Digestion Digest, Vol 7, Issue 1

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Today's Topics:

   1. Re: Digestion Digest, Vol 6, Issue 17 (Choppalli Venkata Krishna)
   2. (no subject) (Paul Harris)
   3. Biogas Accident (Dr Stephen P Etheridge)


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Message: 1
Date: 28 Feb 2011 06:14:30 -0000
From: "Choppalli Venkata Krishna" <krishnacreat1 at rediffmail.com>
To: "digestion11" <digestion at lists.bioenergylists.org>
Subject: Re: [Digestion] Digestion Digest, Vol 6, Issue 17
Message-ID:
	
<1298843163.S.12613.5856.F.H.TmRpZ2VzdGlvbi1yZXF1ZXN0QGxpc3RzLmJpb2VuZQBEaWd
lc3Rpb24gRGlnZXN0LCBWb2wgNiwgSXNzdWU_.f4-234-225.old.1298873670.9369 at webmail
.rediffmail.com>
	
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There are some 'Janata Model' Fixed Dome digesters in India - these were
installed in 198 in India under the National Programme on Biogas
Development.. In '86, Deenbandhu Fixed Dome model took over from  over
Janata Model for its multi advantages over Janata. Still a good percent of
these plants are functional. Functionality depends on after installation
care, regular feeding and any other that can make the plant functional.
Ofcourse prime conditions for longivity of any digester are - Quality of
building materials, Skill of construction. and proper CURING. The toilets in
Indian villages are connected to the inlet side of the digester if a
pre concieved toilet jointing is there; if the cocept is later than the
digester constrution, the toilet's out let is fed/connected to the Inlet
tank of the Digester with a top cover to prevent possible odour of fresh
excreta.-CVKrishnaIndiaOn Mon, 28 Feb 2011 03:16:03 +0530
digestion-request at lists.bioenergylists.org wrote>Send Digesti
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Message: 2
Date: Tue, 1 Mar 2011 12:06:33 +1030
From: "Paul Harris" <paul.harris at adelaide.edu.au>
To: "'For Discussion of Anaerobic Digestion'"
	<digestion at lists.bioenergylists.org>
Subject: [Digestion] (no subject)
Message-ID: <00a901cbd7b1$18e00970$4aa01c50$@harris at adelaide.edu.au>
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G'day All,

 

The item below may be of interest to some - it was sent from an address not
registered on the listserver. Note that only registered addresses will be
accepted (otherwise you would get even more spam!). If you want to send a
Conference Announcement please use you registered address (it is possible to
have several but only use one to receive e-mails).

 

Happy digesting,

HOOROO

 

Mr. Paul Harris, Room S116b, Waite Main Building Faculty of Sciences, The
University of Adelaide, Waite Campus, PMB 1, Glen Osmond SA 5064 Ph    : +61
8 8303 7880      Fax   : +61 8 8303 4386 mailto:paul.harris at adelaide.edu.au
http://www.adelaide.edu.au/directory/paul.harris

 

CRICOS Provider Number 00123M

This email message is intended only for the addressee(s) and contains
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delete this email. Use, disclosure or reproduction of this email by anyone
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representation is made that this email or any attachments are free of
viruses. Virus scanning is recommended and is the responsibility of the
recipient.

 

Dear Colleague,

 

On behalf of the organizing committee of the 1st International Conference on
Biogas Microbiology that will be held in Leipzig, Germany from September 14
to 16, 2011, we invite you to submit abstracts for posters and short oral
presentations. Online registration is now open - see the following link on
our homepage: 

 

 <https://www.conftool.net/biogas-microbiology-2011/>
https://www.conftool.net/biogas-microbiology-2011/

 

Please, submit your abstract before 30th April 2011. Reduced early
registration fee is available until 14th July 2011. 

 

Contributions from all over the world focusing on the hot topics of biogas
microbiology are warmly welcome.

 

We are looking forward to meeting you in Leipzig!

 

 

Marcell Nikolausz & Sabine Kleinsteuber

On behalf of the Organizing Committee

 

 

 <http://www.ufz.de/biogas-microbiology>
http://www.ufz.de/biogas-microbiology

 

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Message: 3
Date: Tue, 1 Mar 2011 10:48:20 +0700
From: "Dr Stephen P Etheridge" <spe at biotrix.asia>
To: <Digestion at bioenergylists.org>
Subject: [Digestion] Biogas Accident
Message-ID: <002a01cbd7c3$832d26c0$89877440$@asia>
Content-Type: text/plain; charset="us-ascii"

Fellow AD Listmembers

 

I wrote a note on 29th Jan re: Biogas explosions, a subject that could
potentially affect everyone in this sector. I did not realise that I would
have to revisit the subject so soon.

 

Last Friday at 4.30pm a major biogas explosion at a Tapioca Starch Factory
in Thailand injured 31, 18 seriously. Since that time 7 have died of burns
injuries and this number is expected to increase. 

 

See: 

http://www.baanmaha.com/community/blogs/entry470.html

http://www.thaivisa.com/forum/topic/446507-40-workers-injured-in-gas-explosi
on-in-chaiyaphum/

http://www.nationmultimedia.com/home/31-workers-injured-in-gas-explosion-in-
Chaiyaphum-30149629.html

http://www.ethailand.com/news/five-more-workers-killed-raising-gas-explosion
-toll-to-seven-91356.html

http://koratfart.com/isaan-news/chaiyaphum-31-workers-injured-in-gas-explosi
on/

http://www.nationmultimedia.com/2011/03/01/national/Factory-death-toll-hits-
seven-30149747.html

 

Clearly this has the potential to affect everyone in this sector but
certainly those of us woking in Thailand and S E Asia. As far as I am aware
this would be the worst biogas accident globally.

 

The biogas plant was built by P&S Designs Co., Ltd. -
http://www.psbiogas.com/eng/intro.html , however the explosion was not at
the digester, but at the starch bagging plant where the biogas is used.

 

The english language press indicates that burning wild grass entered a
biogas pipe, which seems strange since biogas pipes are sealed. The Thai
language press indicates that "hot work" (i.e. welding) was taking place
over a biogas pipe. It is common in Thailand to use HDPE pipe for biogas but
usually only up to the building where the "point of use" is. After that it
should be, and usually is, stainless steel. However, if welding was taking
place near an HDPE biogas pipe then this could have resulted in inital
ignition.

 

There have been two prior small explosions here with faulty burner gas
valves but this can happen with any gas boiler coupled with poor maintenance
(Previous explosions detailed in Appendix 2
http://www.eeec.eng.ku.ac.th/files/Handbook-BiogasSafety-IndustryFactory.pdf
). From personal experience in the Thai Tapioca sector the bagging area
rarely gets the respect it deserves as a potentially explosive area
(http://www.youtube.com/user/Jermani099#p/a/u/2/s02zYPE_AgM ). Having said
that, there are more than 200 large scale Tapioca biogas plants in Thailand
and a biogas explosion has not happened before. 

 

I suspect that biogas may have ignited and that this may have triggered a
starch explosion in the enclosed bagging area, but without substantial
information this is pure speculation at this point.

 

I will let the group know if there are substantive developments and I am
sure we would all wish to express our sympathies to those involved.

 

 

Stephen Etheridge 

spe at biotrix.asia

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