Search found 10 matches

by ragadinks
Tue Jan 03, 2006 10:33 am
Forum: Anaerobic Digester
Topic: two-stage digester and plug-flow design ?
Replies: 17
Views: 18591

Hi,

have found an interesting article called:
"LIFE CYCLE COMPARISON OF FIVE ENGINEERED
SYSTEMS FOR MANAGING FOOD WASTE"

here: http://www.insinkerator.com/pdf/uwstudy.pdf

cheers,
Arno
by ragadinks
Tue Jan 03, 2006 9:40 am
Forum: Anaerobic Digester
Topic: two-stage digester and plug-flow design ?
Replies: 17
Views: 18591

http://www.keidel.com/design/select/disposers.htm : Bio-Charge? is a fresh, citrus-scented solution featuring natural microorganisms that help break down food waste.More than 300 million microorganisms start to digest food waste instantly - even before waste reaches the septic tank. (each cartridge...
by ragadinks
Tue Jan 03, 2006 7:34 am
Forum: Anaerobic Digester
Topic: two-stage digester and plug-flow design ?
Replies: 17
Views: 18591

I just wonder how the macertion process works and if it also can handle substrate like kitchen waste, grass clippings, straw etc.? It won't handle fibrous waste like straw, etc, without chopping it up further. (Using a garbage disposer, maybe?) A garbage disposer seems to be well suited for this ( ...
by ragadinks
Sat Dec 31, 2005 7:57 am
Forum: Anaerobic Digester
Topic: two-stage digester and plug-flow design ?
Replies: 17
Views: 18591

How does the human waste enter the digester ? I mean is the raw substrate somhow mixed/stirred before entering beeing pumped into the digester ? Right now, I have a 1-1/2 pint/flush marine toilet emptying into a small holding tank (holds about 1-1/2 gallons) under the floor. I pump this out every o...
by ragadinks
Wed Dec 28, 2005 6:06 am
Forum: Anaerobic Digester
Topic: two-stage digester and plug-flow design ?
Replies: 17
Views: 18591

but leave the methane-phase as a CSTR Sorry for the question, but what does CSTR mean ? I am not familiar with this term ... The 2-stage design is able to culture distinctly different populations in each stage solely by controlling the retention time in each. A 2-3 day retention time in the first s...
by ragadinks
Wed Dec 28, 2005 5:47 am
Forum: Anaerobic Digester
Topic: two-stage digester and plug-flow design ?
Replies: 17
Views: 18591

On mine (using both Firefox and IE), it increases from 95.66 to 101.46 cf/day. I'm going to guess that the problem is with font size or browser display. What browser are you using? Guess you are right - I use firefox on linux and it seems that the first digit (01.46) is cut off due to the larger fo...
by ragadinks
Wed Dec 28, 2005 5:19 am
Forum: Anaerobic Digester
Topic: two-stage digester and plug-flow design ?
Replies: 17
Views: 18591

I'm not sure of your question. The model assumes 95 degF reactor temperature, and that some percentage of the biogas generated will be used to maintain that temperature above ambient. If you will look under the section "Gas Usage", the item "Remaining Heat available for use" is the net available *a...
by ragadinks
Wed Dec 28, 2005 5:17 am
Forum: Anaerobic Digester
Topic: two-stage digester and plug-flow design ?
Replies: 17
Views: 18591

I have only used it with human waste (augmented with kitchen wastes of varying quality and quantity), and have never performed detailed analysis of either the composition of the wastes or of the biogas. That said, with these feedstocks, total gas volume produced correlates well with the model, at t...
by ragadinks
Sat Dec 24, 2005 6:10 am
Forum: About Biorealis Systems, Inc.
Topic: Thanks for this site
Replies: 8
Views: 25152

dslc1000 wrote:Hi. I'd also like to express appreciation for this site. Fair dues to Mr. Crosby! I agree with much of the philosophy outlined in the 'Statement of Purpose'.
Yeah, thats also my opinion - I like the reasoning behind you mission statement - thanks for the site !

arno
by ragadinks
Fri Dec 23, 2005 5:53 am
Forum: Anaerobic Digester
Topic: two-stage digester and plug-flow design ?
Replies: 17
Views: 18591

two-stage digester and plug-flow design ?

Hello, Have just found your this site here and must say that it is really very interesting - great job ! It's the first time that I come across the two stage digester design where the acidogenic and the methanogenic phase are seperated. I wonder if the same effect is achieved in a plug-flow digester...