Search found 12 matches

by davidwillis
Thu Jun 17, 2010 8:21 am
Forum: Anaerobic Digester
Topic: a new AD forum guy
Replies: 11
Views: 19099

Re: a new AD forum guy

Does anyone know a way to estimate how much energy it takes to compress the biogas?
by davidwillis
Wed Jun 16, 2010 4:01 pm
Forum: Anaerobic Digester
Topic: Questions, Thoughts, Ideas on building a digester
Replies: 1
Views: 4299

Re: Questions, Thoughts, Ideas on building a digester

I dont' have the answers to most of that... but maybe this can help you with the first question...
by davidwillis
Tue Jun 15, 2010 2:53 pm
Forum: Anaerobic Digester
Topic: Energy indepentend home
Replies: 11
Views: 13171

Re: Energy indepentend home

Ok, it has been a cold spring, but I am trying to re-learn about digesters. And I have found out that I can get grass clipping, and cow manure and grass clippings for nothing to run my digester. So I am thinking of mixing 1/2 manure with 1/2 grass clippings. From what I understand this will produce ...
by davidwillis
Wed Apr 07, 2010 9:13 am
Forum: Anaerobic Digester
Topic: Energy indepentend home
Replies: 11
Views: 13171

Re: Energy indepentend home

I took a break for a bit... I still want to do this, and may get some time this summer to work on it more.

How is yours going?
by davidwillis
Wed Feb 04, 2009 8:19 am
Forum: Anaerobic Digester
Topic: using aerobic process to heat anerobic digester?
Replies: 2
Views: 5113

Re: using aerobic process to heat anerobic digester?

Thanks bob... I didn't think about the explosive mixture!
by davidwillis
Mon Feb 02, 2009 10:05 am
Forum: Anaerobic Digester
Topic: using aerobic process to heat anerobic digester?
Replies: 2
Views: 5113

using aerobic process to heat anerobic digester?

I am working on my plan for an anaerobic digester, and just got to thinking, it may be easier to keep it heated directly by aerobic digestion. This may be simpler than burning methane to heat the digester. I have two ideas, the first one would be the easiest, but I am not sure if it would work, or i...
by davidwillis
Thu Jan 29, 2009 11:18 am
Forum: Anaerobic Digester
Topic: Energy indepentend home
Replies: 11
Views: 13171

Re: Energy indepentend home

Thanks... It looks like I will just run it, and take periodic samples with ph paper. It would be nice to be able to monitor everything, but it probably isn't necessary, and is not worth the money. I can probably just find a system that will pump hot water around the tank when it cools down from some...
by davidwillis
Wed Jan 28, 2009 3:54 pm
Forum: Anaerobic Digester
Topic: Energy indepentend home
Replies: 11
Views: 13171

Re: Energy indepentend home

Thanks Bob, that is very good information. Right now I am trying to get some plans together, and then this summer I am going to build a digester. I am excited about it. I am still trying to work out the gas cleaning and storage. I will post some drawings when I get the design down. Also, do you know...
by davidwillis
Sat Jan 17, 2009 9:23 pm
Forum: Anaerobic Digester
Topic: Energy indepentend home
Replies: 11
Views: 13171

Re: Energy indepentend home

I just ran some numbers through the Digester calculator. If I make 2.25 ton of corn, that will equate to about 15 lbs / day... Putting that in the sawdust or leaves category, it gives me 48 ft^3/day (which is about what I was figuring). However, my carbon/nitrogen ratio is 500... I know it should be...
by davidwillis
Sat Jan 17, 2009 9:12 pm
Forum: Anaerobic Digester
Topic: Energy indepentend home
Replies: 11
Views: 13171

Re: Energy indepentend home

Thanks for the comments... and this wonderful sight... I am learning more each day.... here are some of my thoughts... let me know if I am off in any of this. But it looks very promising. 1- That is good advice, but I am trying to figure out a way to produce all the energy I need using only what is ...
by davidwillis
Tue Jan 13, 2009 12:35 pm
Forum: Anaerobic Digester
Topic: Energy indepentend home
Replies: 11
Views: 13171

Energy indepentend home

I would like to make my house totally energy independent by using a Digester solar heat, and a generator (to be run off of the methane). I don't need it to be automatic, in fact I it would be good to have chores for the kids to do(although I don't want it dangerous). I have a house on a two acre lot...
by davidwillis
Tue Jan 13, 2009 10:32 am
Forum: Anaerobic Digester
Topic: saving the world and other fun stuff...
Replies: 30
Views: 40778

Re: saving the world and other fun stuff...

I am very interested in this (on a small scale). I would like to read what is in the R&D. How Do you get access to that?

Thanks
David

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