Archive:000/Crop residues: Difference between revisions
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Nearly every food crop has some parts that are too fibrous for people to eat. These are referred to as [[crop residues]] or ''biomass waste.'' | |||
'''Examples:''' | '''Examples:''' | ||
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* peanut shells | * peanut shells | ||
* coconut shells | * coconut shells | ||
* empty corn cobs with no kernels | * empty corn cobs with no kernels | ||
* rice husks | |||
* sunflower seed husks | |||
* [[straw]] | * [[straw]] | ||
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'''Abundance:''' | '''Abundance:''' | ||
* Production is roughly equal to food production, because about half of the average food crop is biomass waste (the other half is food). | * Production is roughly equal to food production, because about half of the average food crop is biomass waste (the other half is food). | ||
* This page needs more precise numbers. | * This page needs more precise numbers. | ||
--> | |||
'''Uses:''' | '''Uses:''' | ||
# All biomass waste can be burned for [[energy]]. | # All biomass waste can be burned for [[energy]]. | ||
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3 and 4 are both ways to convert fiber into human-edible protein & calories. Help figure out which of these processes is more efficient overall. This page doesn't have enough information yet - join the {{talk}}. | 3 and 4 are both ways to convert fiber into human-edible protein & calories. Help figure out which of these processes is more efficient overall. This page doesn't have enough information yet - join the {{talk}}. | ||
==Supply== | ==Supply== | ||
{{dp | {{dp | ||
| Line 48: | Line 49: | ||
|4 kalorie/gram | |4 kalorie/gram | ||
}} | }} | ||
{{dp | |||
|power_plant.efficiency | |||
|33% | |||
|How much of the fuel combustion heat becomes electricity | |||
|This applies to any power plant that runs on biomass, coal, nuclear fission, or in some cases natural gas. The fuel heats water which generates steam to drive a turbine that generates electricity. | |||
}} | |||
How much does the world produce: | |||
{{calc | {{calc | ||
|crop_residues / world.population | |crop_residues / world.population | ||
| Line 53: | Line 63: | ||
|dry_mass | |dry_mass | ||
}} | }} | ||
If all of it was burned for [[energy]], it would be equivalent to burning: | |||
{{calc | {{calc | ||
|dry_mass * fiber.energy_by_mass | |dry_mass * fiber.energy_by_mass | ||
|cups gasoline/day per capita | |||
}} | |||
If it was burned in a power plant, the electricity generated would be: | |||
{{calc | |||
|dry_mass * fiber.energy_by_mass * power_plant.efficiency | |||
|watts per capita | |watts per capita | ||
}} | }} | ||
<!-- | '''Biomass energy is nowhere near enough to power the world.''' | ||
<!--But it's still better than nothing, and at least it's not the same as [[biofuel|burning edible food]].--> | |||
--> | |||
Revision as of 21:20, 5 April 2023
Nearly every food crop has some parts that are too fibrous for people to eat. These are referred to as crop residues or biomass waste.
Examples:
- banana leaves
- peanut shells
- coconut shells
- empty corn cobs with no kernels
- rice husks
- sunflower seed husks
- straw
Uses:
- All biomass waste can be burned for energy.
- Some kinds of biomass waste can be converted into packaging.
- Some kinds of biomass waste can be fed to ruminants (cows).
- Some kinds of biomass waste can be used for cultivating mushrooms.
- If there's no other use, biomass waste can be composted back into the soil.
3 and 4 are both ways to convert fiber into human-edible protein & calories. Help figure out which of these processes is more efficient overall. This page doesn't have enough information yet - join the discussion discussion.
Supply
Soybean meal is not counted here, because it can be turned into human food (soy flour).
Source:
Breewood, H. & Garnett, T. (2020). What is feed-food competition? (Foodsource: building blocks). Food Climate Research Network, University of Oxford.
Page 10
References primary source:
Mottet, A., de Haan, C., Falcucci, A., Tempio, G., Opio, C., & Gerber, P. (2017). Livestock: On our plates or eating at our table? A new analysis of the feed/food debate. Global Food Security.
How much does the world produce:
(calculation loading)
If all of it was burned for energy, it would be equivalent to burning:
(calculation loading)
If it was burned in a power plant, the electricity generated would be:
(calculation loading)
Biomass energy is nowhere near enough to power the world.