Identify inputs and outputs o Relational arrangements of the processes The

Identify inputs and outputs o relational arrangements

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Identify inputs and outputs o Relational arrangements of the processes The process equipment (rows 2 & 5) o Like analyzing a product Complementary processes (row 4) o Whether the primary process needs preceding or subsequent processes
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L03 Slide 40 Case Study: Steel Making vs PET Making
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L03 Slide 41 Simplification of Steel Making Coal Mine Coke making Iron Mine Blast Furnace Coal Iron Ore Limestone Resource Provisioning Primary Process Operation Complementary Process Steel Oxygen Furnace
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L03 Slide 42 PET Production
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L03 Slide 43 Simplification of PET Production Oil Extraction Oil Distillation Ethylene Terephthalic Acid Resource Provisioning Primary Process Operation Complementary Process PET Resin Ethylene Glycol Production PET Production
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L03 Slide 44 Process SLCA Matrix Life Stage Environmental Stressor Materials Choice Energy Use Solid Residues Liquid Residues Gaseous Residues Resource Provisioning A B Process Implementation A B Primary Process Operation A B Complementary Process Operation A B Refurbishment, Recycling, Disposal A B
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L03 Slide 45 If either of the following conditions apply, the matrix element rating is 0 : For the case where materials are acquired from suppliers : Metals from virgin ores are used, creating substantial waste rock residues that could be avoided by the use of virgin material, and suitable virgin material available from recycling streams. For the case where supplier components/subsystems are used: All incoming packaging is from virgin sources and consists of three or more types of materials. If all of the following conditions apply, the matrix element rating is 4 : For the case where materials are acquired from suppliers: No solid residues result from resource extraction or during production of materials by recycling (example: petroleum ). For the case where supplier components/subsystems are used: Minimal or no packaging material is used or the supplier takes back all packaging materials. For the case where supplier components/subsystems are used: Incoming packaging is totally reused/recycled . Source: SLCA Book, by Graedel Resource Provisioning/Solid Residue (1,3)
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L03 Slide 46 Resource Provisioning/Solid Residue (1,3) Continued If neither of the preceding ratings is assigned, complete the checklist below. Assign a rating of 1 , 2 , or 3 depending on the degree to which the product meets DfE preferences for this matrix element: Is the process designed to minimize the use of materials whose extraction or purification involves the production of large amounts of solid residues (i.e., coal and all virgin metals )? Is the process designed to minimize the use of materials whose extraction or purification involves the production of toxic solid residue ? (This category includes all radioactive materials .) Has incoming packaging volume and weight, at among all levels (primary, secondary, and tertiary), been minimized ?
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  • Fall '09
  • MURRAYTHOMSON

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