11 2 Composting

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11 2 Composting

  1. 1. Waste Management Term: Composting Website – EPA - composting
  2. 2. Composting <ul><li>The purposeful biodegradation of organic matter, such as yard and food waste </li></ul>
  3. 3. Google Composting – Go to the EPA site <ul><li>Go to Basics </li></ul><ul><li>What percentage of the US waste stream is made up of materials that could be composted? </li></ul><ul><li>Make a list of what can be and what cannot be composted. </li></ul>
  4. 4. Composting <ul><li>Do’s </li></ul><ul><li>Animal manure </li></ul><ul><li>Cardboard rolls </li></ul><ul><li>Clean paper </li></ul><ul><li>Coffee grounds and filters </li></ul><ul><li>Cotton rags </li></ul><ul><li>Dryer and vacuum cleaner lint </li></ul><ul><li>Eggshells </li></ul><ul><li>Fireplace ashes </li></ul><ul><li>Fruits and vegetables </li></ul><ul><li>Grass clippings </li></ul><ul><li>Hair and fur </li></ul><ul><li>Hay and straw </li></ul><ul><li>Houseplants </li></ul><ul><li>Leaves </li></ul><ul><li>Nut shells </li></ul><ul><li>Sawdust </li></ul><ul><li>Shredded newspaper </li></ul><ul><li>Tea bags </li></ul><ul><li>Wood chips </li></ul><ul><li>Wool rags </li></ul><ul><li>Yard trimmings </li></ul><ul><li>Don’ts </li></ul><ul><li>Black walnut tree leaves or twigs </li></ul><ul><li>Coal or charcoal ash </li></ul><ul><li>Dairy products </li></ul><ul><li>Diseased or insect-ridden plants </li></ul><ul><li>Fats, grease, lard, or oils </li></ul><ul><li>Meat or fish bones and scraps </li></ul><ul><li>Pet wastes (e.g., dog or cat feces, soiled cat litter) </li></ul><ul><li>Yard trimmings treated with chemical pesticides </li></ul>
  5. 5. Research <ul><li>What is the appropriate moisture level for compost? </li></ul><ul><li>What are the carbon ingredients </li></ul><ul><li>What are the nitrogen ingredients </li></ul><ul><li>What is the correct ratio of C to N? </li></ul><ul><li>How do you make a hot pile? </li></ul><ul><li>What is the difference between a hot pile and a cold pile? </li></ul>
  6. 6. Passive or Cold <ul><li>No special requirements </li></ul><ul><li>Pile it up and let it sit </li></ul><ul><li>Add more material at any time </li></ul><ul><li>Takes 6 mos – 1 year </li></ul>
  7. 7. Active or Hot Compost <ul><li>Fast or &quot;active&quot; composting can be completed in two to six weeks. </li></ul><ul><li>This method requires three key activities </li></ul><ul><ul><li>1) &quot;aeration,&quot; by turning the compost pile, </li></ul></ul><ul><ul><li>2) moisture </li></ul></ul><ul><ul><li>3) the proper carbon to nitrogen (C:N) ratio </li></ul></ul><ul><li>Raise the temperature to around 130 -140 </li></ul>
  8. 8. Steps to hot compost <ul><li>Build the pile </li></ul><ul><ul><li>Layer brown & green – chopped up is best </li></ul></ul><ul><ul><li>Don’t add anything after it is built </li></ul></ul><ul><ul><li>Store until you have enough </li></ul></ul><ul><li>Turn every 3-5 days </li></ul><ul><ul><li>Or when temp drops below 120 </li></ul></ul><ul><li>4-5 weeks in summer </li></ul><ul><li>6-8 weeks in fall </li></ul><ul><li>? In winter </li></ul>
  9. 9. Today <ul><li>Build a 3 stage pile </li></ul><ul><li>Make a sign to begin collecting wastes </li></ul><ul><li>Need volunteer to take bucket to cafeteria for lunch every day </li></ul><ul><li>Make a poster/sign to go with it </li></ul><ul><ul><li>Why collecting </li></ul></ul><ul><ul><li>What to/not to add </li></ul></ul>

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