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138 comments on DrumBeat: October 31, 2006

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eric blair on October 31, 2006 - 2:30pm Permalink | Subthread | Parent | Comments top
As you 'call bullshit', please feel free to conact these people
http://www.ashdenawards.org/media_summary06_india_arti

And tell them they need to retract their researched award because you believe it is 'bullshit'.

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Oilrig medic on October 31, 2006 - 2:52pm Permalink | Subthread | Parent | Comments top
It has to be a typo or not enough info.  The article says 1kg daily makes 500 liters but does not say per day per month etc.  So fermentation breaks stuff down.  No additions from air like carbon to CO2.  Now there is no way 1kg of any material can become 500 liters at STP.  High school chem.

So I restate my BS with the caveat of maybe they left out per month after 500 liters or something similar.  I am interested to see the device though I would build one for 500 liters per KG just so I could break laws of physics and chemistry in my own home.

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BobCousins on October 31, 2006 - 3:14pm Permalink | Subthread | Parent | Comments top
It is a typo, see here http://www.arti-india.org/content/view/45/52/. That says 500g per 2kg.

Unfortunately pretty much every press release turns useful information into gibberish, so I prefer to get the source.

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Oilrig medic on October 31, 2006 - 3:35pm Permalink | Subthread | Parent | Comments top
Don't get me wrong I compost my organic waste...if I could capture BTU's on the way to fertilizer I would but I think household size fermenters are not feasible.  Think about it could you cook your food on your previous scraps?  You need more external inputs...yard debri manure etc.
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Leanan on October 31, 2006 - 3:52pm Permalink | Subthread | Parent | Comments top
Notice in the press release that the testimonials have people saying things like, "I get all my neighbors to give me their scraps."  Suggesting that one family's waste is not enough.  
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Oilrig medic on October 31, 2006 - 4:06pm Permalink | Subthread | Parent | Comments top
Again I think conceptually it is great if we all managed all our waste streams 100% the world would be better off. My point is if someone tells you they can make straw into gold guard your 1st born child.  If you are producing that much ort maybe you need to plan your meals better.
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sendoilplease on October 31, 2006 - 11:25pm Permalink | Subthread | Parent | Comments top
That sounds about right Leanan (unless your family owns a cow or several smaller critters maybe - pool your poop?).  This is a few years old but makes an interesting point about how practical digesters would be if the corn-stover and wood-pelleters Fuel-Twitch to "Home Grown" biogas all at once:

"37. Digesters can be built in virtually any size, from a small family-sized digester (1-2 m3) producing just enough gas for cooking and lighting to a large community-sized of thousands of m3 producing sufficient gas to generate electricity.  

The technical viability of biogas technology has been repeatedly proven in many field tests and demonstration projects, but numerous problems arose as soon as mass dissemination was attempted, particularly with regard to availability of digester feedstock (animal manure and water), as well as the high investment cost (US$300-500 for 1-2 m3) ".

http://72.14.203.104/search?q=cache:wHweFyb2GKcJ:www.uneca.org/estnet/ECA_Meetings/CSD3/RETs_Paper.d oc+household+africa+size+fermenters+natural+gas+fertilizer&hl=en&gl=us&ct=clnk&cd=6

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138 comments on DrumBeat: October 31, 2006

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