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Vermicomposting / Worm Composting PowerPoint Presentation
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Vermicomposting / Worm Composting

Vermicomposting / Worm Composting

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Vermicomposting / Worm Composting

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  1. Vermicomposting /Worm Composting

  2. Funded by the Indiana Department of Environmental Management Recycling Grants Program Developed by the Indiana Rural Community Assistance Program - RCAP Presentation 10:The Composting Toolkit

  3. Vermicomposting • Vermicomposting is more commonly called “worm composting” • Fruit and vegetable matter waste are eaten by redworms • The worms produce “castings” that can be utilized as a high quality compost • 1 pound of redworms can eat 4 pounds of food waste in a week

  4. Vermicomposting

  5. Redworms • Redworms: Eisenia Foetida. The worms most commonly used for worm composting. • Common names: Red wigglers, brandling worms, manure worms. • In nature redworms live and feed in the leaf litter along the surface of the soil

  6. Types of Food: The YES List • Vegetable matter and peels • Vegetables too rotten to eat • Fruit, rinds, and peels • Grains and grain products • Breads • Beans • Coffee grounds and filters • Tea leaves and tea bags • Unbleached paper products • Egg shells (well ground)

  7. Types of Food: The NO List • Leftovers heavy in oils, milk products, or any meats • Meat products and bones • Dairy products • Eggs • Oily foods • Salty foods • Vinegar

  8. Types of Food: The CAUTION List • Banana Peels (They can be a source of fruit flies) • Pineapple Rinds and Skins (Very acidic) • All citrus fruits in large quantities (Acidic) • Small amounts of eggs or cheese (Leftovers with very small amounts of either of these is okay)

  9. Worm Bins

  10. Worm Bins • There are many types of worm bins available for purchase • It is also fairly easy to construct your own worm bin out of readily available materials. • Bins made of opaque materials are better than bins made of clear materials (the worms prefer darkness)

  11. Worm Bin Dimensions • Shallow is better. Remember that redworms are surface feeders. A container depth of eight to twelve inches is ideal • 1 – 2 people: • 1 ft. X 1½ ft. X 2 ft. bin / 1 lb. worms • 2 – 3 people: • 1 ft. X 2 ft. X 2 ft. bin / 1 lb. worms • 4 – 6 people: • 1 ft. X 2 ft. X 3½ ft. bin / 2 – 3 lbs. worms

  12. Look in the Manual for Detailed Construction Instructions

  13. Look in the Manual for Detailed Construction Instructions • This bin is sized to suit a family of four-six people generating about seven pounds of food waste each week. • Materials:1½” sheet of plywood1 12' 2x41 16' 2x42 lbs. 6d galvanized nails1½ lb. 16d galvanized nails2 galvanized door hingesNote: Do not use wood that has been pressure-treated or treated with toxic preservatives. Non-toxic wood preservatives are available. • Tools:Tape measure, skill saw or rip hand saw, hammer, saw horses, long straight edge or chalk snap line, screwdriver, and drill with ½” bit. Use eye and ear protection.

  14. Examples: Homemade Bins

  15. Examples: Pre-built Bins

  16. Worm Bedding

  17. Worm Bedding • There are a variety of suitable bedding materials for worm compost bins: • Shredded newspaper • Shredded cardboard • Shredded office paper • Leaves • Peat moss

  18. Operating A Worm Bin • By following these simple steps the worms will take care of the composting process for you. • Make sure the bin is covered • Make sure moisture content stays in an acceptable range: not soaking wet, not too dry • Bury all new food waste under existing bedding • Plenty of airflow • Do not overfeed worms

  19. Ideal Conditions For Worm Bins • Temperature needs to be kept within a reasonable range: 40 F to 90 F. Freezing temperatures will kill worms as will temperatures over 90 F. • pH needs to be kept in balance. The tendency is for a bin to become acidic. Add egg shells, crushed dolomite, or crushed limestone. • Worms prefer the dark.

  20. Worm Bins: Indoors Or Outdoors? • As long as the idea conditions are met a bin can be either indoors or outdoors. • In Indiana we do not have ideal year round conditions for a small scale outdoor worm composting bin.

  21. Common Problems: Odors • Common causes for odor: lack of oxygen, too much water, or generally stinky foods • A lack of oxygen can be cured by adding more air holes to the bin and regularly turning the bedding when it becomes stinky. • For too much water, add more bedding and/or hold off adding more food waste till bin is drier. Wood bins tend to be less wet than plastic bins. • There are some foods, like onions and broccoli, that are smelly while decomposing. If these odors are offensive you might want to eliminate these offending items from the bin.

  22. Common Problems: Crawl Outs • Worms may crawl out if conditions in the bin are wrong to them. Types of problems: bin too acidic, bin too wet or too dry, atmospheric conditions. • Be aware that crawl outs may be sign of a problem needing resolution.

  23. Common Problems: Fruit Flies • Though fruit flies do not pose a health hazard, these little creatures are a nuisance.

  24. Common Problems: Fruit Flies • Some techniques to fight fruit flies: • Bury food waste in bedding • Do not overload the bin • Cover food waste with wet newspaper • Wash and scrub the skins of fruits and vegetables before placing them in the bin • Avoid banana peels • Don’t let citrus fruit dominate the bin

  25. End Product • The worm composting process leaves you with three usable and sellable products: • Worms • Vermicompost • Vermicompost Tea • Finished compost can be mixed with potting soil and used for houseplants and patio containers. It is an excellent mulch and premium soil amendment.

  26. Some Markets For Worms • Other start-up vermicomposting operations • Bait and tackle shops • Businesses that need worms as food for animals: • Fish hatcheries • Pet stores • Zoos • Bird or poultry growers • Frog farmers

  27. Some Markets For Vermicompost • Home improvement centers, nurseries, landscape contractors, greenhouses, garden supply chains, grocery chains, flower shops, general public.

  28. Some Markets ForVermicompost Tea • Your own house plants • Orchards • Nurseries • Greenhouses • Landscapers • Retailers

  29. Harvesting Finished Compost • Keep in mind that the redworms hate light. Use this to your advantage. • Place open bin under bright light • Remove top layer • Leave in light again • Repeat

  30. Worm Composting: Any Size • Worm composting can be successfully conducted as a small, medium, or large scale operation. • Larger scale programs have been successfully implemented at institutions such as cafeterias, hospitals, schools and universities, prisons, and military bases.

  31. Large Scale Worm Composting

  32. Large Scale Worm Composting

  33. Large Scale Worm Composting


  35. Thank You! • Additional Questions, Comments, or You Think You Have A Potential Pilot Community • Please Feel Free to Contact Me: Mark W. Davis Technical Assistance Provider Rural Community Assistance Program Office: 1-800-382-9895 Wireless: (812) 320-0720 E-mail: