Composting

Manage organic waste beneficially by encouraging biological processes to decompose material and return nutrients to soil, so you send less garbage to incinerate or landfill and flush less water to septic or sewer systems.

Composting Practices

Intermediate

202: Outdoor Bottomless Bin Composting
203: Outdoor Underground Composting

Expert

301: Indoor Worm Bin Composting
302: Outdoor Worm Bin Composting
303: Kitchen Appliance Composting
304: Composting Toilets
305: Outdoor Hot Composting

Composting Terms

Browns: organic material with high available carbon content
Compost (noun): organic material that has decomposed to resemble soil
Compost (verb): to encourage organic material to decompose into compost
Decompose: to break apart large molecules into smaller molecules
Garbage: solid waste that is not composted or recycled
Greens: organic material with high available nitrogen content
Liquid waste: liquids you no longer want
Organic material: high-molecular-weight substances that naturally decompose into smaller-molecule substances
Recycle: return waste to manufacturers for use to produce valuable goods
Solid waste: solid material you no longer want

Composting 101: Outdoor Pile Composting

Description
Make a compost pile outdoors to keep organic materials on-site to decompose naturally. Rather than transporting organic materials off site and losing soil-building nutrients, use your compost to improve local soil and increase biodiversity.
Pathways
Goals
  1. Save the environmental costs of:
    1. storing, transporting, incinerating, and landfilling solid waste; and
    2. flushing, holding, and treating liquid waste.
  2. Keep organic material out of landfills, septic tanks, and treatment plants.
  3. Enrich local soil with compost.
  4. Enhance your backyard biodiversity without creating a nuisance or hazard.
  5. Learn more about your local environment.
Equipment and Materials
  • Kitchen sink strainer [Optional]
  • Kitchen compost pail [Optional]
  • An outdoor area, one to three square meters, for a compost pile
  • Wire, wood, or similar material to build a composting bin [Optional]
  • “Brown” ingredients (dried leaves, paper, cardboard, wood chips, etc.)
  • “Green” ingredients (kitchen scraps, grass clippings, chicken poop, etc.)
  • Liquid organic waste (drinks, sauces, urine, etc.) [optional]
  • Garden hose or watering can [optional]
  • Gardening tools (shovel, pitch fork, rake, wheel barrel, etc.) [optional]
Steps
  1. Allocate an outdoor area, one to three square meters, for a compost pile.
  2. Build a composting bin in this area. [Optional]
  3. Collect “browns” and “greens.”
  4. Layer “greens” covered by “browns” on your compost pile.
  5. Pour liquid organic waste on your pile, cover with “browns.” [Optional]
  6. Keep your pile moist. [Optional]
  7. Turn your pile so materials in it all get exposed to air. [Optional]
  8. Allow decomposition to occur naturally, producing compost.
  9. Use this compost to amend soil.
Measurements
  • How many liters of solid and liquid waste you compost on site.
  • How many liters of garbage you send to incinerate or landfill.
Outcomes
  1. Increase the volume of solid and liquid waste you compost on site.
  2. Reduce the volume of garbage you send to incinerate or landfill.
  3. Reduce the volume of water you flush to your septic or sewer.
  4. Amend your soil with compost.
Discussion

The practice of outdoor pile composting handles organic waste beneficially by encouraging biological decomposition to break down material and return nutrients to soil, so you send less garbage to incinerate or landfill and flush less water to septic or sewer systems. This composting 101 practice is suitable for pathogen-free plant-based material and requires at least a square meter of outdoor area for a compost pile. Outdoor pile composting can be a daily practice, but decomposition slows or stops during cold weather, so this practice may require months or several years to produce compost. Intermediate and expert composting practices can produce compost much faster than this practice.

This practice is a step along these pathways:

  • Goods: Manage Waste Well to compost or recycle 100% of your solid waste, incinerating or landfilling zero percent of your waste.
  • Food: Grow Organic Food to replace synthetic pesticides and fertilizers with integrated pest management and compost.
  • Habitat: Conserve Habitat to increase biodiversity in your local ecosystem.
  • Community: Demonstrate Best Practices for family, friends, and neighbors.

Organic waste includes paper, cardboard, wood, food scraps, weeds, leaves, grass clippings, dishwater, and other putrescible materials. If this waste is not composted on site, it must be transported off site using trucks for solids and septic or sewer systems for liquids. Environmental savings achieved by composting organic waste:

  • No plastic bags are required to contain it.
  • No trucks are required to pick it up.
  • No air pollution is emitted to transport or incinerate it.
  • No particulate matter is created while transporting it. (As tires wear down, small pieces break off and pollute air and water as particulate matter.)
  • No transfer stations are required to sort through and route it.
  • No incinerators are required to burn it.
  • No landfills are required to bury it.
  • No landfill methane gas is created from it. (Organic material buried in landfills creates methane, an explosive and potent greenhouse gas.)
  • No water treatment plant sludge is created from it.

A backyard compost pile provides habitat for detritivores; soil amended with compost provides fertile habitat for a diversity of species below ground and above. Compost adds organic matter to soil, which improves the ability of many plants to grow in clay or sand and to tolerate infrequent watering.

Superb composting practice benefits all concerned, without creating a nuisance or hazard. Poor composting practice may create bad odors, attract vertebrate pests, grow weeds, and spread pathogens that sicken your family, guests or pets.

For pathogenic and animal-based material, practice other composting methods that reach higher temperatures and deter vertebrate pests. For decomposition to occur year round in cold climates, you'll need tens of cubic meters of material (to maintain warmth inside the pile) or practice indoor composting methods.

Definitions
Troubleshooting
  1. Your compost pile smells bad:
    1. Turn your pile to expose material to air.
    2. Increase your ratio of “browns” to “greens.”
    3. Investigate which materials cause smells; avoid composting them.
    4. Practice intermediate or expert composting methods.
  2. Materials in your compost pile decompose slowly or not at all:
    1. Outdoor temperatures may be too cold; wait for warm weather.
    2. Water your pile.
    3. Turn your pile to expose moist material to air.
    4. Increase your ratio of “greens” to “browns.”
    5. Add a compost accelerator, such as material from a hot pile.
  3. Your compost pile attracts vertebrate pests (mice, rats, raccoons, etc.):
    1. Observe whether pests are eating material in your pile; if so, stop adding those items.
    2. Observe whether pests are nesting in your pile for warmth; if so, trap pests.
    3. Practice pest-proof composting methods.
  4. Your compost pile attracts invertebrate pests (mites, flies, spiders, etc.):
    1. This is natural and unavoidable in outdoor composting; these species indicate a healthy local ecosystem.
    2. Practice indoor composting methods.
  5. You produce very little compost:
    1. This is a natural and desirable outcome; you have successfully achieved the goals of this practice.
    2. Increase the volume of material you add to your pile.
    3. Invite family, friends, and neighbors to contribute their organic waste to your compost pile.
  6. Many weeds grow in soil you've amended with compost:
    1. This may simply indicate the soil is more fertile.
    2. Avoid putting weeds that have gone to seed in your pile.
    3. Cover your pile to avoid wind-blown weed seeds accumulating.
Limitations
  • Composting aromatic food waste (including meat, dairy products, baked goods, and oils) with this method can smell bad and attract pests.
  • Cold weather inhibits composting.
  • Pathogens (viruses, fungi, bacteria, weed seeds, etc.) may persist in finished compost.
  • Waste may take a year or longer to fully decompose.
Opportunities
  • Practice intermediate or expert composting to
    • Compost aromatic food waste and pet waste
    • Compost faster
    • Compost year round
    • Mitigate pathogens
  • Practice plant-based diets to
    • Reduce aromatic food waste
References
Feedback
Report success, failure, or ideas to oursustainablepractice@gmail.com.
Revision
0.0.1 last reviewed June 2024

Composting 102: Off-site Composting Services

Description
Use a composting service to keep organic waste out of incinerators, landfills, septic systems, and wastewater treatment plants.
Pathways
Goals
  1. Save the environmental costs of incinerating and landfilling solid waste.
  2. Keep organic material out of landfills, septic tanks, and treatment plants.
Equipment and Materials
  • Kitchen sink strainer [Optional]
  • Kitchen compost pail [Optional]
  • Organic waste (kitchen scraps, yard waste, etc.)
  • A composting bin provided by your composting service [Optional]
Steps
  1. Use a curbside composting service or find a composting drop off location.
  2. Collect organic waste.
  3. Put waste at curbside for collection or take it to a drop off location.
Measurements
  • How many liters of solid and liquid waste you send to compost.
  • How many liters of garbage you send to incinerate or landfill.
Outcomes
  1. Increase the volume of solid and liquid waste you compost.
  2. Reduce the volume of garbage you send to incinerate or landfill.
  3. Reduce the volume of water you flush to your septic or sewer.
  4. Amend your soil with compost.
Discussion

The practice of using a composting service handles organic waste beneficially by encouraging biological decomposition to break down material, so you send less garbage to incinerate or landfill and flush less water to septic and sewer. This basic composting 102 practice is suitable for disposing of the waste materials your composting service accepts. Collecting organic waste to send to a composting service can be a daily practice, but some services stop collections during cold weather. Intermediate and expert composting practices can compost all organic waste year round.

This practice is a step along these pathways:

  • Goods: Manage Waste Well to compost or recycle 100% of your solid waste, incinerating or landfilling zero percent of your waste.

Organic waste includes paper, cardboard, wood, food scraps, weeds, leaves, grass clippings, dishwater, and other putrescible materials. If this waste is not composted, it must be incinerated or landfilled. Environmental savings achieved by composting organic waste using a service:

  • No incinerators are required to burn it.
  • No landfills are required to bury it.
  • No landfill methane gas is created from it. (Organic material buried in landfills creates methane, an explosive and potent greenhouse gas.)
  • No water treatment plant sludge is created from it.

Superb composting practice benefits all concerned, without creating a nuisance or hazard. Poor composting practice may create bad odors, attract vertebrate pests, grow weeds, and spread pathogens that sicken your family, guests or pets.

Definitions
Troubleshooting
  1. Your organic waste smells bad:
    1. Layer "greens" between "browns."
    2. Use a compost pail with an activated charcoal filter.
    3. Store waste in a freezer between pickups or drop offs.
Limitations
  • Composting services may not accept all types of organic waste.
  • Composting services may not be provided for free.
  • This practice incurs environmental costs to transport waste to compost.
Opportunities
  • Practice other composting methods to
    • Save the environmental costs of transporting waste to compost
    • Create compost on site
    • Compost all types of organic waste
    • Compost year round
  • Practice plant-based diets to
    • Reduce bad smells from your food waste
References

Composting Locator Services

See also Composting References

Feedback
Report success, failure, or ideas to oursustainablepractice@gmail.com.
Revision
0.0.1 last reviewed June 2024

Composting 103: Outdoor Primitive Composting

Description
Keep organic materials on-site to decompose naturally. Rather than transporting organic materials off site and losing soil-building nutrients, use your compost to improve local soil and increase biodiversity.
Pathways
Goals
  1. Save the environmental costs of:
    1. storing, transporting, incinerating, and landfilling solid waste; and
    2. flushing, holding, and treating liquid waste.
  2. Keep organic material out of landfills, septic tanks, and treatment plants.
  3. Enrich local soil with compost.
  4. Enhance your backyard biodiversity without creating a nuisance or hazard.
  5. Learn more about your local environment.
Equipment and Materials
  • Kitchen sink strainer [Optional]
  • Kitchen compost pail [Optional]
  • An outdoor area where you can toss or bury organic waste
  • Organic waste (leaves, paper, cardboard, wood chips, kitchen scraps, grass clippings, chicken poop, drinks, sauces, urine, etc.)
Steps
  1. Allocate an outdoor area for disposing of organic waste.
  2. Toss out, pile up, or bury organic waste in this area.
  3. Allow decomposition to occur naturally, producing compost.
  4. After waste has decomposed, garden or landscape in the area. [Optional]
Measurements
  • How many liters of solid and liquid waste you compost on site.
  • How many liters of garbage you send to incinerate or landfill.
Outcomes
  1. Increase the volume of solid and liquid waste you compost on site.
  2. Reduce the volume of garbage you send to incinerate or landfill.
  3. Reduce the volume of water you flush to your septic or sewer.
  4. Amend your soil with compost.
Discussion

The practice of primitive outdoor composting handles organic waste beneficially by allowing biological decomposition to break down material and return nutrients to soil, so you send less garbage to incinerate or landfill and flush less water to septic or sewer systems. This primitive composting 103 practice is suitable for rural properties without close neighbors or composting ordinances. Primitive outdoor composting can be a daily practice, but decomposition slows or stops during cold weather, so this practice may require months or several years to produce compost. Intermediate and expert composting practices can produce compost much faster than this practice with less risk of nuisances or hazards.

This practice is a step along these pathways:

  • Goods: Manage Waste Well to compost or recycle 100% of your solid waste, incinerating or landfilling zero percent of your waste.
  • Food: Grow Organic Food to replace synthetic pesticides and fertilizers with integrated pest management and compost.
  • Habitat: Conserve Habitat to increase biodiversity in your local ecosystem.
  • Community: Demonstrate Best Practices for family, friends, and neighbors.

Organic waste includes paper, cardboard, wood, food scraps, weeds, leaves, grass clippings, dishwater, and other putrescible materials. If this waste is not composted on site, it must be transported off site using trucks for solids and septic or sewer systems for liquids. Environmental savings achieved by composting organic waste:

  • No plastic bags are required to contain it.
  • No trucks are required to pick it up.
  • No air pollution is emitted to transport or incinerate it.
  • No particulate matter is created while transporting it. (As tires wear down, small pieces break off and pollute air and water as particulate matter.)
  • No transfer stations are required to sort through and route it.
  • No incinerators are required to burn it.
  • No landfills are required to bury it.
  • No landfill methane gas is created from it. (Organic material buried in landfills creates methane, an explosive and potent greenhouse gas.)
  • No water treatment plant sludge is created from it.

Decomposing organic waste provides habitat for detritivores; soil amended with compost provides fertile habitat for a diversity of species below ground and above. Compost adds organic matter to soil, which improves the ability of many plants to grow in clay or sand and to tolerate infrequent watering.

Superb composting practice benefits all concerned. Poor composting practice may create a nuisance or hazard. Bury pathogenic and animal-based material to mitigate the spread of diseases and discourage vertebrate pests.

Definitions
Troubleshooting
  1. Your compost attracts vertebrate pests (mice, rats, raccoons, dogs, coyotes, bears, etc.):
    1. Bury waste deeper.
    2. Practice pest-proof composting methods.
  2. Your compost attracts invertebrate pests (mites, flies, spiders, worms, etc.):
    1. This is natural and unavoidable in outdoor composting; these species indicate a healthy local ecosystem..
    2. Practice more advanced indoor composting methods.
  3. You produce very little compost:
    1. This is a natural and desirable outcome; you have successfully achieved the goals of this practice.
    2. Increase the volume of material you add to your pile.
    3. Invite family, friends, and neighbors to contribute their organic waste to your compost pile.
  4. Many weeds grow in soil you've amended with compost:
    1. This may simply indicate the soil is more fertile.
    2. Deeply bury weeds that have gone to seed.
Limitations
  • This practice is not suitable if your neighbors object.
  • Composting aromatic food waste (including meat, dairy products, baked goods, and oils) with this method can smell bad and attract pests.
  • Sufficient outdoor area is required.
  • Burying organic waste may not be possible in rocky soil.
  • Organic waste buried close to wells may contaminate water supplies.
  • Cold weather inhibits composting.
  • Pathogens (viruses, fungi, bacteria, weed seeds, etc.) in organic waste may persist in finished compost.
  • Waste may take a year or longer to fully decompose.
Opportunities
  • Practice other composting methods to
    • Respect local composting ordinances (if applicable)
    • Compost faster
    • Mitigate nuisances (sights and smells) and hazards (pathogens).
  • Practice plant-based diets to
    • Reduce aromatic food waste
References
Feedback

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Revision
0.0.1 last reviewed June 2024

Composting 201: Outdoor Tumbling Bin Composting

Description
Install a tumbling bin outdoors to keep organic materials on-site to decompose naturally. Rather than transporting organic materials off site and losing soil-building nutrients, use your compost to improve local soil and increase biodiversity.
Pathways
Goals
  1. Save the environmental costs of:
    1. storing, transporting, incinerating, and landfilling solid waste; and
    2. flushing, holding, and treating liquid waste.
  2. Keep organic material out of landfills, septic tanks, and treatment plants.
  3. Enrich local soil with compost.
  4. Enhance your backyard biodiversity without creating a nuisance or hazard.
  5. Learn more about your local environment.
Equipment and Materials
  • Kitchen sink strainer [Optional]
  • Kitchen compost pail [Optional]
  • An outdoor area, at least one square meter, to place a compost bin
  • A single- or dual-chamber or continuous-flow tumbling bin
  • “Brown” ingredients (dried leaves, paper, cardboard, wood chips, etc.)
  • “Green” ingredients (kitchen scraps, grass clippings, chicken poop, etc.)
  • Liquid organic waste (drinks, sauces, urine, etc.) [optional]
  • Garden hose or watering can [optional]
  • Gardening tools (shovel, pitch fork, rake, wheel barrel, etc.) [optional]
Steps
  1. Allocate one square meter or more outdoors for a compost bin.
  2. Buy or build a tumbling compost bin and place it in this area.
  3. Collect “browns” and “greens.”
  4. Put “greens” and “browns” in your bin and give it a spin.
  5. Pour liquid organic waste into your bin, add “browns.” [Optional]
  6. Check the moisture level of material in your bin. [Optional]
  7. Spin your bin every few days to mix material thoroughly. [Optional]
  8. Allow decomposition to occur naturally in your bin.
  9. Remove material when your bin is full.
  10. Finish composting the material you remove from your bin. [Optional]
  11. Use this compost to amend soil.
Measurements
  • How many liters of solid and liquid waste you compost on site.
  • How many liters of garbage you send to incinerate or landfill.
Outcomes
  1. Increase the volume of solid and liquid waste you compost on site.
  2. Reduce the volume of garbage you send to incinerate or landfill.
  3. Reduce the volume of water you flush to your septic or sewer.
  4. Amend your soil with compost.
Discussion

The practice of tumbling bin outdoor composting handles organic waste beneficially by encouraging biological decomposition to break down material and return nutrients to soil, so you send less garbage to incinerate or landfill and flush less water to septic or sewer systems. This method can decompose most kinds of organic waste, and requires an outdoor area one square meter or more for a tumbling compost bin, which are available in many materials and styles:

  • Plastic bins are lighter and more affordable, but rodents and bears can chew through them.
  • Metal bins are more rugged but more expensive.
  • Uninsulated bins are lighter and more affordable, but make compost more slowly; insulated bins are heavier and more expensive, but make compost quicker and can continue decomposition during cold weather.
  • Single-chamber designs are simple and affordable, but require a batch method or finishing compost in a separate step.
  • Dual-chamber designs are more expensive, but allow continuous composting without buying a second single-chamber bin.
  • Continuous-flow designs allow you to add fresh material in the entry port and remove decomposed material from the exit port.

Tumbling bin outdoor composting can be a daily practice, but decomposition slows or stops during cold weather, so this practice may require many months or a year to produce compost unless you have an insulated bin. Expert composting practices can produce compost much faster than this practice.

This practice is a step along these pathways:

  • Goods: Manage Waste Well to compost or recycle 100% of your solid waste, incinerating or landfilling zero percent of your waste.
  • Food: Grow Organic Food to replace synthetic pesticides and fertilizers with integrated pest management and compost.
  • Habitat: Conserve Habitat to increase biodiversity in your local ecosystem.
  • Community: Demonstrate Best Practices for family, friends, and neighbors.

Organic waste includes paper, cardboard, wood, food scraps, weeds, leaves, grass clippings, dishwater, and other putrescible materials. If this waste is not composted on site, it must be transported off site using trucks for solids and septic or sewer systems for liquids. Environmental savings achieved by composting organic waste:

  • No plastic bags are required to contain it.
  • No trucks are required to pick it up.
  • No air pollution is emitted to transport or incinerate it.
  • No particulate matter is created while transporting it. (As tires wear down, small pieces break off and pollute air and water as particulate matter.)
  • No transfer stations are required to sort through and route it.
  • No incinerators are required to burn it.
  • No landfills are required to bury it.
  • No landfill methane gas is created from it. (Organic material buried in landfills creates methane, an explosive and potent greenhouse gas.)
  • No water treatment plant sludge is created from it.

A tumbling compost bin provides habitat for detritivores; soil amended with compost provides fertile habitat for a diversity of species below ground and above. Compost adds organic matter to soil, which improves the ability of many plants to grow in clay or sand and to tolerate infrequent watering.

Superb composting practice benefits all concerned, without creating a nuisance or hazard. Poor composting practice may create bad odors, attract vertebrate pests, grow weeds, and spread pathogens that sicken your family, guests or pets.

This practice deters vertebrate pests. For pathogenic and animal-based material, practice other composting methods that reach higher temperatures. For decomposition to occur year round in cold climates, you'll need tens of cubic meters of material (to maintain warmth inside the pile) or practice indoor composting methods.

Definitions
Troubleshooting
  1. Your tumbling compost bin smells bad:
    1. Spin your bin to expose all material to air.
    2. Increase your ratio of “browns” to “greens.”
    3. Investigate which materials cause smells; avoid composting them.
    4. Practice expert composting methods.
  2. Materials in your compost bin decompose slowly or not at all:
    1. Outdoor temperatures may be too cold; wait for warm weather.
    2. If the contents of your bin are dry, add water.
    3. If the contents of your bin are wet and slimy, add more “browns.”
    4. Spin your bin more frequently to expose moist material to air.
    5. If “browns” persist in your bin, increase your ratio of “greens” to “browns.”
    6. Add a compost accelerator, such as material from a hot pile.
  3. Your compost bin attracts vertebrate pests (mice, rats, raccoons, etc.):
    1. Set traps. Fully enclosed, above-ground tumbling bins are the most pest-proof outdoor composting method.
    2. Practice indoor composting methods.
  4. Your compost bin attracts invertebrate pests (mites, flies, spiders, etc.):
    1. This is natural and unavoidable in outdoor composting; these species indicate a healthy local ecosystem.
    2. Practice indoor composting methods.
  5. You produce very little compost:
    1. This is a natural and desirable outcome; you have successfully achieved the goals of this practice.
    2. Increase the volume of material you put through your bin.
    3. Invite family, friends, and neighbors to contribute their organic waste to your compost bin.
  6. Many weeds grow in soil you've amended with compost:
    1. This may simply indicate the soil is more fertile.
    2. Avoid putting weeds that have gone to seed in your bin.
Limitations
  • Tumbling bins can be expensive.
  • Each bin has a finite rate (volume per time) for making compost.
  • Material may not fully compost in the bin; you may need to finish material using another composting practice. This is especially true for single-chamber bins.
  • Cold weather inhibits composting.
  • Pathogens (viruses, fungi, bacteria, weed seeds, etc.) may persist in finished compost.
  • Waste may take a year or longer to fully decompose.
Opportunities
  • Use two bins or a two-chambered bin to practice continuous composting
    • Add fresh material to one bin or chamber
    • Allow old material to finish in the second one.
  • Practice intermediate or expert composting to
    • Compost faster
    • Compost year round
    • Mitigate pathogens
  • Practice plant-based diets to
    • Reduce aromatic food waste
References
Feedback
Report success, failure, or ideas to oursustainablepractice@gmail.com.
Revision
0.0.1 last reviewed June 2024

Composting References

Composting Locator Services

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