[Digestion] "Re: Rex enquiry "

[bingham]

"Re: Rex enquiry "Cover the pit with HDPE sheeting. Smell goes away the you can use the effluent to knife in as fertilizer.
The gas is easily collected and cleaned up for CHIP generator unit. 
Lowest cost of any system I am aware of.
Brent
  ----- Original Message ----- 
  From: Bill Rucks 
  To: digestion at lists.bioenergylists.org 
  Sent: Tuesday, June 07, 2011 2:24 PM
  Subject: [Digestion] "Re: Rex enquiry "


  Hi all,

  > 

  >> I am going to do something I swore I would never do. Unfortunately, I 

  >> just don't have the time and know that the folks on this list know 

  >> far more than me and can point me in the right direction.

  >> I live in a rural area where we are subject to occasional power cuts 

  >> (power lines down mostly due to weather) but, more importantly, our 

  >> power bills are rocketing as South Africa races to catch up to the 

  >> rest of the world in terms of cost of power. Historically we had paid 

  >> off coal fired power plants that gave us the lowest cost of power in 

  >> the world. Anyway, now that power costs are rising, own generation is

  > becoming an economic necessity.

  > 

  >> In my area we have a large number of dairy farms milking >500 cows. 

  >> These are sizeable operations and the manure they produce is worth

  > pursuing.

  >> Typically they all have slurry dams and they spread their manure from 

  >> time to time (much to our temporary dismay while the odour kills us!).

  >> The question is: what is an economical way of producing gas? Bear in 

  >> mind, efficiency is not an issue in this case. What we are talking 

  >> about is getting gas that can be cleaned up and fed into motors to 

  >> produce power. I am looking at using 3 litre petrol engines that will 

  >> push out about 50kW tops. So, we are not looking for anything fancy. 

  >> A plugflow system would make most sense as they can pump it into the 

  >> one end while the processed material leaves the other. Heating 

  >> suggestions? What about using the engine exhaust to heat water and 

  >> circulate that around the reactor or use it to preheat the incoming 

  >> feed? Here I was simply thinking of a double tank with hot water in 

  >> the

  > outer tank... any other suggestions?

  > 

  >> The other thing these farmers use a lot of is sileage (chopped maize 

  >> that is stored and allowed to ferment). Has anyone had experience 

  >> adding some of this to the AD?

  > 

  >> Looking forward to hearing from you all!

  >> Rex


  >Greetings Rex

  > I can understand your problem and can only offer my personal advice! 

  > Electrical energy out of waste is an expensive/time consuming process - I would look into what I use my energy for and how can I reduce my electrical requirement!! 

  > Unfortunately in this day and age - we look to supplement out currant energy consumption with renewable energy - ( not that this cannot be done) !!

  > We should be all reducing our energy requirements as much as we can - and to start log what we use and think how we can reduce, reduce, reduce. 

  > Then we create a picture of how much electrical we need!! and the do the assessment on what energy resourse, human waste -food waste, grass ect  you have available - through this email list you should understand how much energy you can get out of your waste!

  > I also look at your waste Gas stream - Co2 and Biogas - most dwellings and building emit allot of gases and we don't know about it !! 

  > When you no your total energy potential - both gas and solid - then work on redirecting storing and converting your waste back to energy !! simple - 

  > I have a saying - "Waste is not waste its unutilised energy"

  Bill Rucks 




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


  _______________________________________________
  Digestion mailing list

  to Send a Message to the list, use the email address
  Digestion at bioenergylists.org

  to UNSUBSCRIBE or Change your List Settings use the web page
  http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org

  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/

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/digestion_lists.bioenergylists.org/attachments/20110607/ccb769bb/attachment.html>