[Digestion] flex-use bio gas plant

[mylesacc at comcast.net]

Paul,

No you are not getting cynical, least not yet. Some of situations we have run into need different silutions. We had one proposal for a central digester with effluent coming from several large farms in a 75 mile range. The biogas produce would be more than needed at the digester location, building a pipeline & the right of way was beyond economical. The suggested solutions was clean up the gas for compressing and run the effluent trucks on CNG. With waste water treatment plants there are seasonal changes, sometimes more gas is used than produced and sometimes it is the other way. We recommended CNG vehicles for the municpal plants excess gas production. I speaking mostly of the gas produced being used for heating of digesters & facilities. A cleaned up gas can be used for electric generation, again tying into an electric network usually comes out with no monetary gain. Using the gas on site is the best way no doubt. Always enjoy your comments. 

Cheers
Peter Z


-------------- Original message -------------- 
From: Paul Harris <paul.harris at adelaide.edu.au> 

> G'day All, 
> 
> I must be getting cynical in my old age, but suggest that with schemes 
> to compress NG and purify biogas the company be called "Nett Energy 
> Systems?". Biogas should be used directly if possible, as compression is 
> a waste of energy (unless the expansion is harnesses as a source of 
> cold!) 
> 
> It would probably be far easier (and MUCH more acceptable to neighbours, 
> of the central plant anyway!) to put the digesters on farm and pipe the 
> gas to the school. 
> 
> Happy digesting, 
> HOOROO 
> 
> mylesacc at comcast.net wrote: 
> > 
> > Jason, 
> > 
> > I have worked with a company New Energy Solutions Inc (www.nesi.biz) they have 
> a method of converting ADG from dairy manure into pipeline quality natural gas, 
> which also can be compressed for CNG vehicles. NESI also can produce ultra-pure 
> hydrogen from the digester gas. NESI has a beta site on a dairy farm near 
> Cornell Univ. 
> > 
> > Peter Z 
> > _______________________________________________ 
> > Digestion mailing list 
> > Digestion at listserv.repp.org 
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> 
> -- 
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