Assign a rating of 1 2 or 3 depending on the degree to which the product meets

Assign a rating of 1 2 or 3 depending on the degree

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Assign a rating of 1 , 2 , or 3 depending on the degree to which the product meets DFE preferences for this matrix element. - Have materials been chosen and used in light of the desired recycling/disposal option for the product (e.g., for incineration, for recycling, for refurbishment)? - Does the product minimize the number of different materials that are used in its manufacture? - Are the different materials easy to identify and separate ? Is this a battery-free product? - Is this product free of components containing PCBs or PCTs (e.g., in capacitors and transformers)? - Are major plastics parts free of polybrominated flame retardants or heavy metal-based additives (colorants, conductors, stabilizers, etc.)?
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L03 Slide 30 End-of-Life Phase Failed lightbulb Landfill or incinerator Hg Solid Waste
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L03 Slide 31 End of Life/Material Choice (5,1) CFL: Hg used Product contains significant quantities of mercury (i.e., mercury relays), asbestos (i.e., asbestos based insulations), or cadmium (i.e., cadmium or zinc plated parts) that are not clearly identified and easily removable. )?” Score: _____ Incandescent Not recyclable “Are the different materials easy to identify and separate ?” Score: ______
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L03 Slide 32 Which one emits more mercury (Hg)? Source: Laurie Ramroth, 2008
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L03 Slide 33 SLCA Considerations Results are not quantitative measurements of environmental performance More of an estimate for potential improvement Good for comparing multiple alternatives Can be performed early in the design process Precise definition of the functional unit is not essential According to Graedel 1998: [An SLCA should be] complete and rigorous enough to be a definite guide to industry and an aid to the environment, yet not so detailed as to be difficult or impossible to perform.
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L03 Slide 34 SLCA Assets and Liabilities More efficient Less costly Useable in the early stages of design Can be applied to a wide variety of products and industrial activities No or minimum capability to track overall materials flow Minimum capability to compare dissimilar approaches to fulfilling a need Minimum capability to track improvements over time Assets Liabilities
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January 25 & 28, 2019 L03 Part 2: Streamlined LCA-Process
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L03 Slide 36 Process Assessment Construct a flow diagram Evaluate the inputs and outputs Consider the implications of each stage Cooking oil E H Food waste Cooking Prepared raw food food Cooked Water Waste water Washing & Trimming Food water Raw food as received raw food Prepared
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L03 Slide 37 Process Life Cycle Stages 1a 1b 2a 2b 3
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L03 Slide 38 SLCA Matrix for Processes Life Stage Environmental Stressor Materials Choice Energy Use Solid Residues Liquid Residues Gaseous Residues Resource Provisioning (1,1) (1,2) (1,3) (1,4) (1,5) Process Implementation (2,1) (2,2) (2,3) (2,4) (2,5) Primary Process Operation (3,1) (3,2) (3,3) (3,4) (3,5) Complementary Process Operation (4,1) (4,2) (4,3) (4,4) (4,5) Refurbishment, Recycling, Disposal (5,1) (5,2) (5,3) (5,4) (5,5)
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L03 Slide 39 Approach to Process Analysis The process itself (rows 1 & 3) o Study of the actual operation o
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  • Fall '09
  • MURRAYTHOMSON

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