Search found 302 matches
- Sat Jan 05, 2008 6:53 pm
- Forum: Anaerobic Digester
- Topic: digester design and costs estimates
- Replies: 1
- Views: 18721
Hi Tom, Sounds like a great project. Did you plug the feedstocks into the online calculator ? It can give you a rough estimate of overall tank volume required. Yes, you should be able to scale up the prototype plans, but that may not be the best idea. With multiple tanks like you have, I think I'd c...
- Sat Jan 05, 2008 5:56 pm
- Forum: Anaerobic Digester
- Topic: two-stage digester with corrugated pipe
- Replies: 1
- Views: 18899
- Fri Nov 30, 2007 9:31 am
- Forum: Anaerobic Digester
- Topic: carbon to nitogen ratio of feedstock
- Replies: 1
- Views: 18118
- Fri Nov 23, 2007 8:36 pm
- Forum: Anaerobic Digester
- Topic: anaerobic digestion of poultry waste
- Replies: 1
- Views: 18483
Hi John, Your operation is far bigger than the small scale systems I have any experience with, or that are described here. That said, the data I use in my online calculator is from Other Homes and Garbage by Leckie, Masters & Young. More information is available here . Scroll down to the table near ...
- Tue Nov 20, 2007 3:48 pm
- Forum: Anaerobic Digester
- Topic: New and looking around for info
- Replies: 1
- Views: 18555
Hi Dunappy,
Welcome.
A good place to start would be with this online calculator. It can give you a rough idea of the size of your digester and an estimate of gas production.
Welcome.
A good place to start would be with this online calculator. It can give you a rough idea of the size of your digester and an estimate of gas production.
- Mon Nov 12, 2007 1:14 pm
- Forum: Anaerobic Digester
- Topic: Piedmont Biofuels Digester Design
- Replies: 10
- Views: 39108
That's it, girl Mark. I've used a 30 gal drum inverted inside a 55 gallon drum, with three vertical 1-1/2" PVC pipe guides bolted to the 55 gal drum to keep the inverted drum straight as it rises & falls. The gas pressure under the weighted cover is a function of the weight of the cover and its hori...
- Sun Nov 11, 2007 12:27 pm
- Forum: Anaerobic Digester
- Topic: Piedmont Biofuels Digester Design
- Replies: 10
- Views: 39108
There are various so-called 'hybrid' designs in which there are multiple batch-fed 'first stages', which generate the "food" (volatile acids) for the methanogens in the biogas digester. And only the biogas digester needs to be carefully controlled for pH and temp -- a cost (and complexity) savings....
- Thu Nov 08, 2007 6:19 pm
- Forum: Anaerobic Digester
- Topic: Piedmont Biofuels Digester Design
- Replies: 10
- Views: 39108
Its interesting to hear that the acidogens don't require as much heat. At what temperatures do they work most effectively and what range of temperature can they survive? This page provides an explanation. Basically they consist of a large and diverse group of hardier creatures. They can survive a w...
- Thu Nov 08, 2007 12:48 pm
- Forum: Anaerobic Digester
- Topic: Piedmont Biofuels Digester Design
- Replies: 10
- Views: 39108
We're building wooden boxes to house 5/8" aluminum coils that will be packed in with clay (here in north carolina we have plenty of metal rich red clay) that will interface with the plastic tanks. Are they sized based on the heat loss calculations above? Or flying by 'seat of the pants'? How will t...
- Mon Nov 05, 2007 10:16 am
- Forum: Anaerobic Digester
- Topic: Piedmont Biofuels Digester Design
- Replies: 10
- Views: 39108
- Thu Oct 25, 2007 12:03 pm
- Forum: Anaerobic Digester
- Topic: Piedmont Biofuels Digester Design
- Replies: 10
- Views: 39108
Hi scumeye, Wow. I'm honored, girlmark. Nice to see you here. I came across your biodiesel forum a couple of years ago, when I was involved with a community food production project for rural Alaska and was very impressed. Some of the best d-i-y biodiesel information available. (The project involved ...
- Tue Oct 02, 2007 9:15 am
- Forum: General Catchall
- Topic: fledgling converting a bus
- Replies: 1
- Views: 17621
Hi Rosa, You and your dog can't generate enough waste to run a fridge, but you and your dog plus a bunch of leaves, yard clippings and/or vegetable scraps, etc. possibly could. On the other hand, building operating and maintaining such a digester might also be more costly than just buying electricit...
- Wed Aug 29, 2007 2:55 pm
- Forum: Anaerobic Digester
- Topic: AD using diaposable diapers
- Replies: 3
- Views: 23256
Yes. In my opinion, disposable diapers are just another example of our dominant culture's "smart but not wise" thinking. Human waste does not belong in landfills, and the plastic and artificial fiber in these diapers does not belong in our sewers or wastewater treatment plants. The best solution to ...
- Sun Aug 26, 2007 9:10 am
- Forum: Anaerobic Digester
- Topic: AD using diaposable diapers
- Replies: 3
- Views: 23256
- Sun Aug 05, 2007 8:55 am
- Forum: Composting Toilet
- Topic: Solviva's flush toilet composting filter
- Replies: 3
- Views: 22633
- Sat Jul 21, 2007 8:47 am
- Forum: Biofilter
- Topic: BioFilter Treatment Questions
- Replies: 20
- Views: 81015
I think we use an average 180l (~50 gal) / day /person, yet the norms specify a minimum of 300 liter. That sounds pretty typical. The need to design for worst case and safety factor is discussed in the proposal. If a full backup system is in place (a drain field), then the reclamation system doesn'...
- Sat Jul 21, 2007 8:38 am
- Forum: Composting Toilet
- Topic: Solviva's flush toilet composting filter
- Replies: 3
- Views: 22633
- Thu Jul 19, 2007 8:18 am
- Forum: Biofilter
- Topic: BioFilter Treatment Questions
- Replies: 20
- Views: 81015
- Wed Jul 18, 2007 9:57 am
- Forum: Biofilter
- Topic: BioFilter Treatment Questions
- Replies: 20
- Views: 81015
what is a natural step for an ecological-conscious person might be a too large leap for humankind, or at least for most people in my country Yes, very true. We in the west have such a long history of putting our shit in our drinking water that it is now taken as a given. To suggest that if we just ...
- Mon Jul 16, 2007 10:55 am
- Forum: Biofilter
- Topic: BioFilter Treatment Questions
- Replies: 20
- Views: 81015
what is the role of pvc ribbons (those you clean on the video)? Wouldnt the dissolved oxigen flowing out of trickle filter be consumed anyway in the sludge at the bottom of the 2nd tank? Good questions, cezar, and not ones I'm sure I have a good answer to. The added media was a bit of an afterthoug...