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Life Cycle Analysis of Yard, Food, and Wood Waste Management Options

Life Cycle Analysis of Yard, Food, and Wood Waste Management Options. Dr. Jeffrey Morris Sound Resource Management jeff.morris@zerowaste.com BioCycle West Coast Conference – March 20, 2006. Greenhouse Gas Reductions for Yard Debris and Food Scraps – I.

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Life Cycle Analysis of Yard, Food, and Wood Waste Management Options

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  1. Life Cycle Analysis of Yard, Food, and Wood Waste Management Options Dr. Jeffrey Morris Sound Resource Management jeff.morris@zerowaste.com BioCycle West Coast Conference – March 20, 2006

  2. Greenhouse Gas Reductions for Yard Debris and Food Scraps – I

  3. Greenhouse Gas Reductions for Yard Debris and Food Scraps - II

  4. Critical Estimates/Assumptions • Methane capture efficiency rate • Landfill carbon storage rate • Compost storage of carbon in soils • Rate of substitution of compost for synthetic fertilizers • Decrease in usage of pesticides facilitated by use of compost • Type of energy use avoided by generation of energy from landfill gas or combustion

  5. Other Health & Ecological Impacts Besides Global Warming • SOx, NOx & particulates (criteria air pollutants) • Human Toxicity • Ecological Toxicity • Acidification • Eutrophication • Ozone Depletion • Smog Formation • Habitat – land and water based

  6. Estimated Life Cycle Benefits of Compost vs. Synthetic Fertilizers & Pesticides for Lawn and Garden Care • Upstream impacts from fertilizer and pesticide manufacture • On site and downstream impacts from release of nutrients and chemicals into the atmosphere and waterways (i.e., volatilization & run-off) • Assumes no impacts from direct skin contact or direct inhalation during application • Does not include impacts of any associated changes in lawn mowing method or frequency • Impacts are per ton of yard debris material composted

  7. Economic Value Of Pollution Reductions From Lawn & Garden Composting

  8. Economic Value of Pollution Reductions From Lawn & Garden Composting

  9. Value of Pollution Decreases from Pesticide/Fertilizer & Gasoline Reductions

  10. Estimated Life Cycle Benefits of Dimensional Lumber Reuse or Fuel Use vs. Landfill Disposal • For reuse includes reduced upstream impacts from manufacture of virgin lumber • For fuel use includes reduced upstream impacts from mining of energy equivalent amount of coal • For fuel use includes reduced/increased impacts from combustion of wood in place of coal at energy generation facilities • For reuse includes increased carbon sequestration in forests • Impacts are per ton of dimensional lumber recovered from the waste stream

  11. Economic Value Of Pollution Reductions From Lumber Reuse & Use as Fuel

  12. fossil carbon dioxide methane hydrogen chloride sulfur oxides nitrogen oxides particulates acetaldehyde cadmium chromium dioxin selenium nitrous oxide antimony arsenic benzene beryllium carbon tetrachloride formaldehyde lead manganese mercury naphthalene phenol Higher Emissions from Fuel Use for:CoalWood

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