ccc workshop - part 2: small-scale composting systems/processing bmps [jean bonhotal, cornell waste...
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Jean BonhotalCornell Waste Management Inst.cwmi.css.cornell.edu
Compost OperationsCompost OperationsIntegrating Composting into Waste Management Plans
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Easy On-site Composting!Turn lawn and yard trimmings and food scraps into rich compost your plants
will love.
Main Working Pile
Finished Compost
Composting at School
Making compost takes some care; add greens, brown, water and air.
Keep a store of browns near to add throughout the year.
Make your pile come alive. Encourage microbes to help it thrive.
You need a lot, to get it hot.
If your pile gets too dry, add water, don’t let it die!
Let fresh air flow through your pile, for an earthy smell all the while. Mix or turn to add more air to make fresh compost you can share.
Cornell Waste Management Institute cwmi.css.cornell.edu
Take it slow, nice and steady, give compost time to get ready.
Curing Pile
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Composting – How It Works
Ingredients - Kitchen•Vegetable peels & seeds•Fruit peels & seeds•Coffee grounds•Egg shells•Nut shells•Any other vegetable or fruit scraps•Waste paper
1. Microorganisms are the key to composting. Creating the proper habitat for them, with a balance of moisture, air and food, makes them more efficient at processing organics. Decomposers differ in their need for temperature zones and types of organics.
2. Diverse types of organic material will provide the habitat for many decomposers. Layer the material: start with a layer of carbon (dry brown material) then a layer of nitrogen (manure, food scraps). Continue in this manner until your pile or container is 1 cubic meter or larger. If you have a large amount of organic material, you will build a windrow, a long narrow pile, 1-2 meters high x 2 meters wide x as long as there is space.
3. The organics should be moist so the microorganisms can digest the material. Moisture comes from the wet, nitrogen rich materials in the pile. Some piles may need more. Rain may help give the compost pile the moisture it needs. If you want to capture more moisture from rain, keep the top of the pile flat or make an indentation to channel the water. If the pile has too much moisture make a peak on top and the rain will run-off. To check the moisture, take a handful of the compost mixture and squeeze it in your hand. If water runs out it is too wet, if the mixture falls apart when you open your hand it is too dry, if the ball holds its shape and only a drop or two of water comes out, it is the correct moisture level to produce compost.
4. Make sure enough air is getting into the pile. The pile or window can work without turning if the material has enough natural airspace, that is why we mix or layer carbon (dry, brown materials) with nitrogen (wet manure, food scraps). If the material is too dense, the pile may need to be turned to break the material up which will increase airspace. Turning also serves to mix the material which can speed the process.
5. When the microorganisms are working they give off heat. As there are millions of them processing organics, the temperature of your pile will increase to 104-149°F. This indicates that the process is working. As long as there is food, air and moisture the pile will stay hot. When it cools down that indicates the pile is going into a curing phase and completing the cycle.
6. The compost process can take 6 months to 2 years depending on all of the variables: air, moisture, food and amount of undigested carbon in the pile.
Do Not Add:*Grease, fats, oils*Fish, meat, bones*Dairy*Pet or human feces*Treated wood
Cover with brown layerGreen
Brown
Third layer: green
Second layer: brown (dry leaves)First layer: sticks 4”-6”
Feed Your Soil!
Ingredients - Yard or Garden •Waste hay or straw•Sticks & leaves•Clean sawdust•Rice hull•Weeds & other garden waste•Manure
A. Wood chip or stick base with plenty of air space.B. Leaves and/or straw or other carbon completely covering green material.C. Steam rising off the pile.D. Air pulled in/out from chimney effect* (arrows).
D
C
A
B
* Chimney effect: as the pile heats up, warm air rises upward creating a partial vacuum and, fresh air flows in to replace it. This requires air space in the base of the pile.
Grass & yard
trimmings
Leaves
Coffee grounds, egg shells, peels
Food scraps
Cornell Waste Management Institute cwmi.css.cornell.edu
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CornellWaste Management Institute
-Static Pile or Windrow -Forced Air Compost-Turned Windrow -Rotating Drums-Combo Static/Turned -Vermicompost units
Many options are available for producing compost:
Composting Composting SystemsSystems
D
C
A
B
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CornellWaste Management Institute
Which system works where?• Space available- neighbors• Containment or not• Time and energy available• Static, Turned or Vermi-compost• Finances• How putrescible(odiferous)is the waste
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CornellWaste Management Institute
All Methods Require Balance:
• Moisture• Aeration• C:N Ratio• Temperature
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Compost Bin Sales
D
C
A
B
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CornellWaste Management Institute
Holding bins
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CornellWaste Management Institute
Restaurant worm bin
New Orleans
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CornellWaste Management Institute
Three bin turning unit with removable front boards.
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Simple Containment
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Plans for 2-binSystem -6’x6’x6’
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Students at South Lewis Composting-These have been installed Some in North country school Districts
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CornellWaste Management Institute Rotating drums Candor Schools
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CornellWaste Management Institute
St. John’s University
Rotating Drums
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CornellWaste Management Institute
Composting Drum @ boarding school with 300 people in
residence, livestock, and green
residuals
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CornellWaste Management Institute
Vokashi-Fermentation
Process
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CornellWaste Management Institute
Earth Tub- institutions
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CornellWaste Management Institute
Earth Bin
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CornellWaste Management Institute
West Irondequoit Central School – Earth Bin
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CornellWaste Management Institute
Tropical Vermi-Composting
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CornellWaste Management Institute
Slabwood vermi compost container
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CornellWaste Management Institute
Vermi in an old feed trough
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CornellWaste Management Institute
Vermi compost in an old water container with an outlet hole to collect nutrient rich leachate
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CornellWaste Management Institute
Cayuga Compost
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NYS Prisons42 Compost Sites
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Multi Bin System
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Cornell Compost site installed
in 92 expanded 2002
Cornell Waste Management InstituteCornell Waste Management Institute http://cwmi.css.cornell.eduhttp://cwmi.css.cornell.edu
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CornellWaste Management Institute
Composting at the urban
farm in Brooklyn
Forced aeration
Turned
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CornellWaste Management Institute
Gov’s Island
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CornellWaste Management Institute
Aerated Compost
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Forced Air Composting --Ulster
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Heat Transfer
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Simple Aeration SystemSunset View Acres
x
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Adding Manure Bank
Diamond Hill Custom Heifers4-5 million BTU/day
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CornellWaste Management Institute
Recycling Recycling Organics Makes Organics Makes
Good Sense!Good Sense!
Healthy Soils = Healthy Food!http://cwmi.css.cornell.eduhttp://cwmi.css.cornell.edu