From Poop to Fuel

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This is my first science project. Next year lasers!!

This is my first science project. Next year lasers!!

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  • 1. BioFuel
    From Food Scrapes to Sustainable Fuel Source
  • 2. What’s biomass and How Can You Get Energy Out of it?
    Is it hard to get energy out of biomass? No, people have been doing it for thousands of years.
    Biomass is made of organic remains from plants and animals which are taken mostly from harvesting and processing of agricultural and forestry crops.
    Biomass are wastes and by-products that could be used as fuels for producing energy, instead of becoming landfill waste.
  • 3. Want to see a cool video of a biofuel plant here in the bay area?
    Visit Water and Video Center
  • 4. What is Biogas and What Kinds of Biomass Are Good at Making Biogas
    Biogas- Organic matter, especially plant matter, that can be converted to fuel and is therefore regarded as a potential energy source.
    Biomass is all plant material, or vegetation, either raw or processed, wild or cultivated. Like trees, grass, corn and vegetables.
    Even though the smell of manure from cows can be strong and disgusting, the waste is a rich source of energy that can be used to make electricity.
  • 5. Materials
    9 empty 2-litre bottles of soda
    40.75 grams of cow manure (as fresh as possible)
    15.25 grams of mashed bananas
    25.2 liters of distilled water or sometimes more, depending on the exact volume of the bottle
    18 large-mouthed (about 3.5cm in diameter) latex balloons
    Metric tape ruler
    Scale, capable of distinguishing between 1g quantities
    Duct tape
  • 6. Procedure
    Clean the nine 2L bottles
    Fill nine bottles with 5 grams of cow manure
    Fill 3 of the bottles with another 5 grams of cow manure
    Fill 3 of the bottles with 5 grams of raw vegetables
    Fill the last 3 bottles with 5 grams of mashed bananas
  • 7. Procedures continued
    Each bottle contains 10g of biomass
    Fill up all the bottles to the top with distilled water
    Place the latex balloon over the soda bottle, un-inflated
    Secure the balloon with some Duct tape
    Measure the diameter of the balloon twice a day for a period of two weeks
  • 8. Results
  • 9. Conclusion and Things to try next time
    Experiments involving bacteria can be very difficult to grow.
    I think this experiment would produce better results if it was done on a bigger scale. More Cow Poo!
    I think that pH had something to do with how much biogas my experiment made. It was either too low or too high. If the pH was around 7 that probably would have been better.
  • 10. Conclusion and things to try next time
    I think temperature had an effect on my experiment. Bacteria only grow at specific temperatures. For example when we brought the experiment inside they seemed to start producing biogas.
    Next Time
    Monitor pH in each bottle
    Monitor the temperature in each set of bottles
    Make bigger biodigesters, and use more manure.
  • 11. Chopping vegetables
    for Test #2
  • 12. Weighing manure
    Starting Test #1
  • 13. Adding distilled water
    Manure has to be fresh.
    Thanks Little Farm
  • 14. Thank you