Search found 302 matches
- Thu Jun 05, 2008 9:04 am
- Forum: About Biorealis Systems, Inc.
- Topic: Am I in the right place?
- Replies: 1
- Views: 16247
Re: Am I in the right place?
Nothing here on methanol, yet, Chad. Mostly just about biogas.
- Sun Jun 01, 2008 6:26 pm
- Forum: Anaerobic Digester
- Topic: Can I use straw as a raw material input?
- Replies: 5
- Views: 27536
Re: Can I use straw as a raw material input?
Whoa! A Nathan sighting.
- Sun May 25, 2008 11:22 am
- Forum: Composting Toilet
- Topic: A new and "better"? batch composting toilet design
- Replies: 14
- Views: 46489
Re: A new and
Hi Eliza, Nice to see you here. I would need to know more about your specific site conditions to be able to say if, or how well my rotating drum, urine-separating design would work for you. Probably the single most important criterion is to have accessible space for it directly below the toilet. How...
- Tue May 13, 2008 6:33 pm
- Forum: Biofilter
- Topic: Drum Biofilter
- Replies: 6
- Views: 32518
Re: Drum Biofilter
I am trying to figure out how to do it without using electrical pumps. I also tried to figure out some way to eliminate pumps, but could find no way to achieve the present functions without them. Even moving water from tank 1 to tank 2 by gravity would create a difficult maintenance problem, and it...
- Mon May 12, 2008 10:44 am
- Forum: Anaerobic Digester
- Topic: Can I use straw as a raw material input?
- Replies: 5
- Views: 27536
Re: Can I use straw as a raw material input?
Here is a link to an FAO Document about the feasibility of treating straw for animal feeding. I would guess that the methods required to make it digestible by microbes would be similar.
- Mon May 12, 2008 10:25 am
- Forum: Anaerobic Digester
- Topic: Can I use straw as a raw material input?
- Replies: 5
- Views: 27536
Can I use straw as a raw material input?
Here is a message copied from Private Messages to new public topic: A couple of in principle questions about methane digestion. Can I use straw as a raw material input? Can straw be chopped up and added to the input to systems where the predominant input is say cow manure? My idea is to take straw t...
- Fri Apr 25, 2008 10:48 am
- Forum: General Catchall
- Topic: Aerobic Digestor Design
- Replies: 1
- Views: 16712
Re: Aerobic Digestor Design
Hi andrew. I have two different aerobic systems developed: a composter for human feces (but waterless, with urine separation), and an aerobic treatment unit for graywater. I'm not sure if either fit your description. (My own approach is to just not put feces in water in the first place. That simplif...
- Sat Mar 01, 2008 7:22 pm
- Forum: Anaerobic Digester
- Topic: Digesting crude biodiesel glycerol
- Replies: 14
- Views: 59792
- Fri Feb 29, 2008 5:20 pm
- Forum: Anaerobic Digester
- Topic: Digesting crude biodiesel glycerol
- Replies: 14
- Views: 59792
Speaking of biodiesel, here is a design I developed a few years ago as one component of a fully sustainable, renewable energy four-season food production facility for a rural Alaska village. The project wasn't fully funded, so this part didn't get built. What's unique about it is that it uses waste ...
- Fri Feb 29, 2008 4:20 pm
- Forum: Anaerobic Digester
- Topic: Digesting crude biodiesel glycerol
- Replies: 14
- Views: 59792
- Fri Feb 29, 2008 4:12 pm
- Forum: Anaerobic Digester
- Topic: Feedstock prep, what sort of pump?
- Replies: 1
- Views: 18058
What sort of prep are you doing on the front end? Would passing the feedstocks through a garbage disposal be effective mastication? I use a diaphragm pump -- commonly use for RV or boat holding tanks. But if the feedstock is fibrous, it will be a maintenance headache. And a nasty one. The extra ene...
- Fri Feb 29, 2008 4:01 pm
- Forum: Anaerobic Digester
- Topic: Methane Digester for village households
- Replies: 8
- Views: 34968
How do you think this would do in temperate climates? I am envisioning building an insulated house for the bag, then looping radiant heat tubing around the base of the bag to keep it around 90F... I guess that all depends on the ambient temperatures (which will determine how much of a building you ...
- Sun Feb 17, 2008 5:38 pm
- Forum: Anaerobic Digester
- Topic: Horizontal versus vertical
- Replies: 1
- Views: 18048
- Sun Feb 17, 2008 5:34 pm
- Forum: Anaerobic Digester
- Topic: Methane Digester for village households
- Replies: 8
- Views: 34968
I found it again at:
http://crat.africa-web.org/Biogas/technology.htm
(it's hard to keep up with link-rot...)
http://crat.africa-web.org/Biogas/technology.htm
(it's hard to keep up with link-rot...)
- Sat Feb 16, 2008 10:52 am
- Forum: Anaerobic Digester
- Topic: mini digester...?
- Replies: 32
- Views: 128822
- Sat Feb 09, 2008 7:24 pm
- Forum: Anaerobic Digester
- Topic: AD Thoughts
- Replies: 1
- Views: 18062
Hi kjankows, (I just discovered your message, posted here almost 2 weeks ago -- but overlooked.) Thanks for the insights -- and the pointer to the online pdf document. It looks excellent. (When I get a chance, I'll print it out and read it in detail.) re comments and/or corrections, I appreciate you...
- Tue Jan 29, 2008 10:25 am
- Forum: Anaerobic Digester
- Topic: Methane Production Vs. C.O.D
- Replies: 3
- Views: 23877
- Tue Jan 08, 2008 6:19 pm
- Forum: Anaerobic Digester
- Topic: fixed film in AD
- Replies: 5
- Views: 26539
Are you familiar with the USEPA's Agstar program? They have some design software and a comprehensive handbook free for downloading, that may fit your application better than my smaller scale stuff.
http://www.epa.gov/agstar/resources.html
http://www.epa.gov/agstar/resources.html
- Tue Jan 08, 2008 4:52 pm
- Forum: Anaerobic Digester
- Topic: fixed film in AD
- Replies: 5
- Views: 26539
Hi Angus, The online calculator waste composition data is taken from Other Homes and Garbage by Leckie, Masters & Young. A screenshot of the lookup table is posted in this topic . (Scroll down to to near the bottom of the thread.) It shows 30 lb/day for horse manure. At an estimated 60-65 lb/cu ft, ...
- Sat Jan 05, 2008 7:08 pm
- Forum: Anaerobic Digester
- Topic: fixed film in AD
- Replies: 5
- Views: 26539
Hi Angus, Adding fixed film media wouldn't actually add hydraulic retention time, but it should achieve a similar effect by giving the microorganisms something to hang on to. That said, though, I've found fixed film media to add cost and complexity. But of course there are all kinds of media, some m...