CCC Workshop - Part 2: Small-Scale Composting Systems/Processing BMPs [Jean Bonhotal, Cornell Waste Management]
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Jean Bonhotal of Cornell Waste Management presented this at ILSR's Cultivating Community Composting workshop.
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CCC Workshop - Part 2: Small-Scale Composting Systems/Processing BMPs [Jean Bonhotal, Cornell Waste Management]
- 1. Jean Bonhotal Cornell Waste Management Inst. cwmi.css.cornell.edu Compost OperationsCompost Operations Integrating Composting into Waste Management Plans
- 2. 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
- 3. 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 layer Green 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 Leave s Coffee grounds, egg shells, peels Food scraps Cornell Waste Management Institute cwmi.css.cornell.edu
- 4. Cornell Waste 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: CompostingComposting SystemsSystems D C A B
- 5. Cornell Waste 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
- 6. Cornell Waste Management Institute All Methods Require Balance: • Moisture • Aeration • C:N Ratio • Temperature
- 9. Cornell Waste Management Institute Restaurant worm bin New Orleans
- 10. Cornell Waste Management Institute Three bin turning unit with removable front boards.
- 12. Plans for 2-bin System -6’x6’x6’
- 13. Students at South Lewis Composting-These have been installed Some in North country school Districts
- 15. Cornell Waste Management Institute Rotating drums Candor Schools
- 16. Cornell Waste Management Institute St. John’s University Rotating Drums
- 17. Cornell Waste Management Institute Composting Drum @ boarding school with 300 people in residence, livestock, and green residuals
- 19. Cornell Waste Management Institute Earth Tub- institutions
- 21. Cornell Waste Management Institute West Irondequoit Central School – Earth Bin
- 22. Cornell Waste Management Institute Tropical Vermi-Composting
- 23. Cornell Waste Management Institute Slabwood vermi compost container
- 24. Cornell Waste Management Institute Vermi in an old feed trough
- 25. Cornell Waste Management Institute Vermi compost in an old water container with an outlet hole to collect nutrient rich leachate
- 27. NYS Prisons 42 Compost Sites
- 28. Multi Bin System
- 29. Cornell Compost site installed in 92 expanded 2002 Cornell Waste Management InstituteCornell Waste Management Institute http://cwmi.css.cornell.eduhttp://cwmi.css.cornell.edu
- 30. Cornell Waste Management Institute Composting at the urban farm in Brooklyn Forced aeration Turned
- 31. Cornell Waste Management Institute Gov’s Island
- 32. Cornell Waste Management Institute Aerated Compost
- 33. Forced Air Composting --Ulster
- 34. Heat Transfer
- 35. Simple Aeration System Sunset View Acres xx
- 36. Adding Manure Bank Diamond Hill Custom Heifers 4-5 million BTU/day
- 37. Cornell Waste Management Institute RecyclingRecycling Organics MakesOrganics Makes Good Sense!Good Sense! Healthy Soils = Healthy Food! http://cwmi.css.cornell.eduhttp://cwmi.css.cornell.edu
Editor's Notes
- Jean work on text.
- Jean work on text.