[USCC] What is Anaerobic Composting

[Dan Noble]

Thanks, Scott.
While I, personally, don't have a direct application of this technology... I will keep it in my "kit bag" as I work with other organics managers in California, and the western US.

I notice that the benefits over aerobic composting are:
  a.. high biogas production rate through large gas discharge area, low digester filling level and several agitators (low-speed units) [assumes you can economically use the biogas I imagine, right?]
  b.. low space requirement 
  c.. use of small compact digesters because material needs not be diluted 
  d.. low heat requirements and low wear through minimized material flow 
  e.. no or very low process water consumption depending on material characteristics 
  f.. low energy demand in material handling, conveying and fermentation through the use of low-speed units only and staggered operating times 
  g.. flexible adjustment to fluctuating throughput rates through a variable filling level in the digester 
  h.. high VSS degradation through quasi-continuous plug flow. 
However, if you have to cover your piles anyway, how does this compare to "aerobic" in vessel composting in terms of dollars invested and returned?  Why not add more water and just do AD?  Are the digested solids profiles produced by this best for "fertilizer" (i.e. > 5% NPK by weight), or do they need to be further composted and then used as a soil amendment?  I imagine this all depends on your feedstock C:N ratio mix, and other nutrients in the feedstock, right?

Yes, I guess, as others have said in previous listings, "anaerobic composting" IS a "misnomer".  And that this process should be called "dry anaerobic digestion" as you guys do on your web site, right??

Thanks so much for any additional information you can provide the compost industry!
Cheers!
Dan
 



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Dan Noble, Executive Director

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  ----- Original Message ----- 
  From: Sustainable Energy Holdings Ltd. 
  To: dan at resourcetrends.com 
  Cc: compost at mailman.cloudnet.com ; hirschsys at aol.com ; dmhill at aol.com 
  Sent: Tuesday, February 24, 2009 11:56 PM
  Subject: What is Anaerobic Composting


  Dan

  I recently had a chance to read some of the e-mail threads on the net and came across one called "What is Anaerobic Composting"

  Please review this technology that Sustainable Energy Holdings Ltd. (SEHL) is exclusively licensed for Canada and the United States.

   

  In the industry it was previously known as the "LINDE" technology.

   

  SEHL is currently looking for facilities to install in both counties.

   

  Please review http://enermac.com/SEHL.htm and if you wish to discuss call 780 902 2007.

   

  Scott MacKay 

  Sustainable Energy Holdings Ltd.

  780 902 2007

   

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