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Grass bioreactor Answered

Hi, I tried building a grass bioreactor out of a 5 gallon bucket. I filled the bucket all the way to the top with grass and filled it with some water, closed it up, and then I let it set for 3 days. I used a lighter to try to to burn the gas, but all I saw was the lighter burning as usual. I am trying to get a reasonable amount of flammable gas for boosting car mpg. 

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KitemanBest Answer (author)2012-06-17

If you're sticking to just grass, you need (a lot) more grass and more time.

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tgferreira184 (author)2012-06-18

you can try use a barrel or two, filled up with grass, water and a little of chicken manure. just adapt a record to the barrel's lid and a hose with a tap

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jbaker22 (author)2012-06-17

Thanks for the answers. Will I have to leave it go for 2-3 weeks to get any reasonable amount the way I am doing it or should I go with a new reactor design?

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rickharris (author)jbaker222012-06-18

Longer I would expect - adding some chicken manure will speed things up.

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steveastrouk (author)2012-06-17

Yes, you need much more volume.

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rickharris (author)2012-06-16

You shouldn't need much water just damp is Ok.

Adding animal or even human waste speeds matter up - Chicken waste is particularly good.

You would be better on a larger scale. A long 100 meters or so heavy duty plastic tube would be a good generator. tie a rope at each end and then another a bit further along to make an air lock for filling and emptying.

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rickharris (author)rickharris2012-06-16

This is also a good design but requires more work.

If your adding animal waste then you will need more liquid.

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