Search found 302 matches

by Bob
Wed Mar 02, 2011 6:03 pm
Forum: Gasifying, Biochar producing Wood Stove
Topic: updated wood gas tech kit
Replies: 4
Views: 10942

Re: updated wood gas tech kit

Looks pretty nice, Jed,

Thanks for the pointer...
by Bob
Sat Jan 22, 2011 9:12 am
Forum: Announcements
Topic: Spammers!
Replies: 0
Views: 8028

Spammers!

I'm getting so overwhelmed with forum spammers (recently a flood coming from eastern European addresses -- about 100 to 1 ratio to legitimate users.) that I'm disabling self-registration on the forum. To register, please just send me an email with your desired username and email address. I'll set up...
by Bob
Sat Jan 22, 2011 8:16 am
Forum: General Catchall
Topic: using methane as vehicle fuel
Replies: 3
Views: 11161

Re: using methane as vehicle fuel

Here are links to a couple of earlier discussions on this forum about the practicability (and thermodynamics) of compressing gas. http://biorealis.com/phpBB3/viewtopic.php?f=19&t=201&p=1219&hilit=compress*#p1219 http://biorealis.com/phpBB3/viewtopic.php?f=3&t=193&p=1104&hilit...
by Bob
Sat Jan 22, 2011 8:04 am
Forum: Gasifying, Biochar producing Wood Stove
Topic: updated wood gas tech kit
Replies: 4
Views: 10942

Re: updated wood gas tech kit

Thanks, Jed. They are doing probably the best work of anybody. Here is a good forum thread, including some questions I asked (I'm "dacroz") http://www.gekgasifier.com/forums/showthread.php?p=1645#post1645 Bottom line, the whole topic turns out to be vastly more complicated than I (and, fro...
by Bob
Sat Jan 22, 2011 7:42 am
Forum: Composting Toilet
Topic: installed the sunmar composter NE3000
Replies: 2
Views: 9280

Re: installed the sunmar composter NE3000

i ought to write a book on the trials and tribulations (legal and disappointments with the claims of the manufacturer as well as some of my own mistakes) Yeah, I'd read that book -- and add some comments of my own. The flush toilet I used with one of these type of composters (Biolet) was a Sealand....
by Bob
Sat Jan 22, 2011 7:30 am
Forum: Anaerobic Digester
Topic: biodigester in costa rica
Replies: 2
Views: 3878

Re: biodigester in costa rica

Thanks, Jed,

I'm in Costa Rica right now, returning to Alaska in April. There are a lot of these digesters around, but I've seen only one that is producing burnable gas. I think there is huge demand/opportunity in teaching/learning how to start them and keep them running.
by Bob
Mon Oct 11, 2010 9:52 am
Forum: About Biorealis Systems, Inc.
Topic: Great Workshops in PA this month!
Replies: 1
Views: 9355

Re: Great Workshops in PA this month!

Wow. Nice to see (read) you here, Matt. Wish I could make it to David's presentation.
by Bob
Fri Mar 26, 2010 2:07 pm
Forum: Anaerobic Digester
Topic: Questions Regarding Digester Basics
Replies: 1
Views: 4135

Re: Questions Regarding Digester Basics

After 3 days in the acidogenesis compartment, is the sludge then transferred to the methanogenesis compartment? And is this methanogenesis compartment initially empty? Is the sludge transferred from the acidogenesis tank to the methanogenesis tank via displacement following feeding the reactor afte...
by Bob
Thu Mar 11, 2010 10:12 am
Forum: Biofilter
Topic: Alaska Greywater
Replies: 1
Views: 9866

Re: Alaska Greywater

Hi Chet, Good questions. Yeah, Alaska does present a set of unique challenges. Are you aware of any state laws regarding DIY water treatment, outdoor humanure storage, greywater, etc? I'm not familiar with all the details, but here is a link to ADEC wastewater treatment and disposal regulations . Gi...
by Bob
Sun Jan 24, 2010 9:59 am
Forum: Anaerobic Digester
Topic: Anaerobic Digester using Horse Manure
Replies: 1
Views: 4035

Re: Anaerobic Digester using Horse Manure

1) Why can't old waste be used? Can't it? 2) When the manure is mixed with water prior to placing in digester what consistency should be attained? About 6% solids -- like thick whipping cream. 3) Does the AD process need to be dosed with bacteria initially or are the different kinds of bacteria nat...
by Bob
Sat Jan 02, 2010 3:52 pm
Forum: Anaerobic Digester
Topic: What quantities of gas would i require for this....
Replies: 3
Views: 4790

Re: What quantities of gas would i require for this....

Approximate heat content of methane (not biogas, but methane) is about 1,000 Btu/cu ft. So 200 CF/day would be about 200,000 Btu/day A small burner on a gas range consumes about 5,000 Btu/Hr (or ~ 5 CF methane). A large burner about 12,500 Btu/Hr. I'm not familiar with small residential scale absorp...
by Bob
Thu Dec 31, 2009 12:25 pm
Forum: Anaerobic Digester
Topic: What quantities of gas would i require for this....
Replies: 3
Views: 4790

Re: What quantities of gas would i require for this....

This calculator can give you a ball-park estimate.
by Bob
Sat Dec 19, 2009 4:48 pm
Forum: Anaerobic Digester
Topic: Materials List For Anaerobic Digester
Replies: 2
Views: 4602

Re: Materials List For Anaerobic Digester

Aloha, helenasophia, Did you see the links at the bottom of this page ? The one labeled Construction will take you to a drawing that has parts called out on it -- as well as construction photos. That said, however, I have moved beyond the design described here. After building it and using it for a f...
by Bob
Thu Oct 29, 2009 1:42 pm
Forum: About Biorealis Systems, Inc.
Topic: Thanks for this site
Replies: 8
Views: 19158

Re: Thanks for this site

Whoa. A Nathan sighting!

Thanks for the ping, Nathan. I have tons of new stuff I could by putting up here, but...

How goes it on your end? (I still think your agwaste -> H2 idea was worth pursuing).
by Bob
Tue Sep 01, 2009 8:15 am
Forum: Biofilter
Topic: Drum Biofilter
Replies: 6
Views: 6654

Re: Drum Biofilter

Most interesting, Nathan. Thanks for the pointer.
(Nice to see you here!)
by Bob
Wed May 13, 2009 9:16 am
Forum: Biofilter
Topic: Drum Biofilter
Replies: 6
Views: 6654

Re: Drum Biofilter

regarding drinking water power requirements

Thanks for the pointer to the Berkey filter, blimpyway. Interesting.

(In case there is any confusion, the drum biofilter described here is not just for drinking water, but will handle up to 50-60 GPD.)
by Bob
Tue Apr 28, 2009 12:31 pm
Forum: Anaerobic Digester
Topic: Digesting crude biodiesel glycerol
Replies: 14
Views: 17956

Re: Digesting crude biodiesel glycerol

Good question. Probably the most important thing is to be sure that you have a good live population of methanogens. And enough buffering capacity to keep the pH from dropping if you overload it.
by Bob
Mon Apr 27, 2009 6:31 pm
Forum: Anaerobic Digester
Topic: Digesting crude biodiesel glycerol
Replies: 14
Views: 17956

Re: Digesting crude biodiesel glycerol

re my "where did you see it question: I saw it on this site... someplace. Now that I'd like to point you to the thread, I can't find it Hah. I found it -- thanks to Mathew's intervening post. Searching for his earlier posts I stumbled across it in this thread . Even tho methanol is toxic to org...
by Bob
Sat Apr 25, 2009 12:41 pm
Forum: Anaerobic Digester
Topic: Digesting crude biodiesel glycerol
Replies: 14
Views: 17956

Re: Digesting crude biodiesel glycerol

...am thinking there's got to be a better use for converting this to energy that I can use... I agree -- which is the motivation for developing a couple of products, including the lab-scale digester shown in the attached pic, and a how-to construction manual to go with it. (A work in progress...) W...
by Bob
Sat Feb 07, 2009 10:59 am
Forum: General Catchall
Topic: Small scale solar thermal electricity/refrigeration
Replies: 1
Views: 5324

Re: Small scale solar thermal electricity/refrigeration

Hi Ben,

Thanks for posting that. Most interesting. I am also most interested in the small-scale ORC technology. Do you know if any of those are on the market yet?

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