[Digestion] Fw: Fw: Purple Sulfur Bacteria.

[Jim and Amy Rankin]

----- Original Message ----- 
From: "Jim and Amy Rankin" <ajrankin at westal.net>
To: <digestion at listserv.repp.org>
Sent: Tuesday, May 22, 2007 6:51 AM
Subject: Re: [Digestion] Fw: Purple Sulfur Bacteria.


> Maybe this explains why a large municipal sewerage plant I visited a few 
> years ago had had good luck for many years passing their biogas through a 
> couple of simple steel boxes full of wood chips.  That and they were using 
> Caterpillar engines to burn the gas and run aeration blowers.  I don't 
> know what the oil change intervals were on them, but they were quite old 
> with very few maintenance problems reported. What I could see from the 
> machines was valve grinding had been done on most of them which is to be 
> expected from gaseous fuel engines in my experience.
>
> This aspect of the plant was an example of "keep it simple" even though it 
> was a municipal installation.  Probably that has been changed by now.
>
> Jim
>
> James R Rankin, DVM
> Cedarcrest Farms, Inc
> Faunsdale, AL USA
>
>>> B/.  Even though it is poisenous to us there is a family of purple 
>>> sulphur
>> bacteria that love it  and only need  a little light to assist them to 
>> grow
>> in the moist air and they will coat any clear surface with a heavy coat 
>> of
>> reddish purple colur and you won't see a thing! So any peepholes etc need 
>> to
>> be carefully covered when not in use. Cheers Ken C.
>