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Module 6: |
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Unit 5 > Introduction |
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| Unit 5: Ash Content and Management |
| Introduction |
| Ash from woody biomass comes from the minerals present in the structure of trees and shrubs in addition to any soil contamination. Properties of wood ash depend on a variety of factors including: |
- type of tree or shrub,
- part of the tree or shrub (bark, wood, leaves),
- type of waste (wood, pulp, or paper residue),
- combination with other fuel sources,
- type of soil and climate and conditions of combustion (5).
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Source: D.E. Wieprecht |
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| Ash presents both a problem and an opportunity: |
- Disposal of ash in landfill areas incurs economic, environmental, and social costs for energy firms/facilities as well as the forest products industry.
- However, if ash is recycled in forest or agricultural ecosystems or used to reclaim mine spoils, depletion of vegetation nutrients, other than nitrogen, and acidification associated with intensive biomass removal can be radically reduced.
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Lessons in this unit include:
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