Tools to Measure Sustainability: Life Cycle Assessment
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1 Tools to Measure Sustainability: Life Cycle Assessment March 7, 2012 Dr. Anahita Williamson, Director Kate Winnebeck, LCACP, Senior EHS Specialist New York State Pollution Prevention Institute at RIT
2 Life Cycle Assessment Life Cycle Assessment (LCA) is a technique used to quantify the environmental impact of a product from raw material acquisition through end of life disposition (cradle-to-grave) Material Extraction Processing Component Fabrication Product Assembly Packaging & Distribution Use End of Use Processing Recycle Reuse Remanufacture Waste Treatment
3 LCA Methodology A Life Cycle Assessment is carried out in four distinct phases: (ISO 14040, 14044) Step 1: Goal definition and scoping. Identify the LCA's purpose, the products of the study, and determine the boundaries. (what is and is not included in the study) Step 2: Life-cycle inventory. Quantify the energy and raw material inputs and environmental releases associated with each life cycle phase. Step 3: Impact analysis. Assess the impacts on human health and the environment. Step 4: Report results. Evaluate opportunities to reduce energy, material inputs, or environmental impacts at each stage of the product life-cycle.
4 LCA Standards ISO & Internationally accepted standards for performing LCA Includes guidance for inventory collection, performing the impact assessment, interpreting results, reporting, and peer reviews Additional requirements for comparative assessments intended to be disclosed to the public Life cycle assessment certified professional (LCACP) US certification program Administered by the American Center for Life Cycle Assessment in accordance with ISO For more information, visit
5 Why use LCA? Quantify environmental benefits of products Provide credible evidence for marketing claims Identify opportunities to improve the environmental performance of products at various points in their life cycle Inform decision-makers in industry, government or nongovernmental organizations Select relevant indicators of environmental performance, including measurement techniques Validate product marketing claims Instill life cycle thinking within businesses
6 Methods of Conducting LCA (1) Manual (2) Software (3) Consultant Advantages of cradle-to-grave analysis for products/processes vs. analysis of only 1 stage of LCA (ie manufacturing)
7 Manual Calculations
8 Xerography
9 Step 1: Goal Definition and Scoping Define the goal: Intended application of the study Intended audience Define the scope: Identify the product system to be studied Define the functional unit Define the boundaries of the product system Identify assumptions and limitations of the study Select impact categories to be included
10 Toner Manufacturing Process Functional Unit = 1 metric tonne of toner produced Two Key Recycling Loops: Internal/External Ref: A.Ahmadi,et.al, J.Clean.Prod., 2003
11 Defining the Boundaries Material Input Carbon Black Production Wastes Produced Resin Production Toner Manufacturing Consumer Use Energy Magnetite Production End-of-Use Processing By-products Ref: A.Ahmadi,et.al, J.Clean.Prod., 2003
12 Toner Life-cycle Inventory Ref: A.Ahmadi,et.al, J.Clean.Prod., 2003
13 The System Material Input Carbon Black Production Wastes Produced Resin Production Toner Manufacturing Consumer Use Energy Magnetite Production End-of-Use Processing By-products Ref: A.Ahmadi,et.al, J.Clean.Prod., 2003
14 Post-production Processing To Indefinite Storage From Toner Manufacturing Customer Use Toner on Paper Deinking of Recycled Paper To Toner Manufacturing Toner Recycling To Solid Waste Management Post production processes begin once the toner is sent to the customer and include: Use of the toner in the xerographic machines Destination of waste toner left in the machines Final destination of the toner that is transferred to the paper
15 Step 2: Life Cycle Inventory Example of Life Cycle Inventory (LCI): Toner Published in Journal of Cleaner Production, 2003 Highly data intensive Detailed mass & energy balances performed over life-cycle Advantages: measure data & define baseline metrics of life-cycle processes Challenges: Assumptions made when data unavailable
16 Step 2: Life Cycle Inventory Inventory collected from multiple sources Inputs Materials Outputs Energy Manufacturing Products database Raw Materials Distribution Customer use Air, Water and Solid Emissions End of use processing
17 Results Energy Use Fossil Fuel Electricity CO2 Units 10 6 kj 10 6 kj 10 6 kj 10 3 kg kg kg kg kg m 3 kg Carbon Black Production min min min Magnatite Production min NaOH min min Magnatite min Resin Production Ethane S.C min min min min Ethylbenzene min min min min Styrene min min min min Butadiene 0.1 min min min Resin Toner Manufacturing 22 min min 23 Consumer Use 150 min min 34 End of Use Processing Toner Recycle min min min min min min min min min 9.2 De-inking of Paper Toner on Paper to Landfill min min min min min min min min min 320 Transportation min min min Raw Materials to T. Man min min min Toner to Customer min min min Toner Waste Recycle min min min Total NOx SO2 VOC's Particulates Wastewater Solid Waste
18 Toner Life-cycle Inventory Ref: A.Ahmadi,et.al, J.Clean.Prod., 2003
19 Step 3: Impact Assessment Converts the inventory into impact categories or end points which explain the environmental effect Impact categories include: carcinogens, respiratory organics and inorganics, climate change, radiation, ozone layer, ecotoxicity, acidification/eutrophication, land use, minerals, fossil fuels Can apply weights to impact categories
20 Impact Assessment Life Cycle Inventory Impact Categories Category Indicators Damage Categories Single Score Indicator NOx SOx Pesticides Heavy metals CO2 VOCs Particulates Chemicals Concentration in air, water, food Concentration greenhouse gases Changed ph and nutrient availability Change in habitat Fossil fuel availability Local effects on species Climate change Ozone layer depletion Radiation Respiratory effects Cancer cases and types Surplus energy Human Health Ecosystem Quality Mineral & Fossil Resources Fate analysis Exposure & effect analysis Damage analysis Normalization & weighting
21 Eco-Indicator 99 Manual for Designers, Ministry of Housing, Spatial Planning, and the Environment, The Netherlands, Oct2000.
22 Impact Assessment Results Impact assessment converts the inventory into impact categories or end points which details the human health and environmental effects.
23 Step 4: Report Results Life cycle interpretation: findings of the inventory analysis or impact assessment are evaluated in relation to the goal and scope of the study to reach conclusions and recommendations 1. Identify significant issues 2. Evaluate results for completeness, consistency, and sensitivity of the data 3. Draw conclusions & make recommendations consistent with the goal & scope of the study
24 Software Calculations
25 Software Calculations Ability to translate the inventory data to environmental impact Used to facilitate life cycle assessments Useful for relatively quick comparisons or complex studies Process User collects input and output data Imbedded inventories populate the associate energy, materials, and wastes associated with materials and processes Impact assessment translates the inventory to environmental damage Two ways to input data: 1. Actual data can be input 2. Select data from the imbedded database Commercially available software options SimaPro, developed by PRé Consultants, GaBi, developed by PE International, Umberto, developed by ifu Hamburg GmbH, Web-based: Earthster ( & LinkCycle (
26 LCA to Support Product Design Compare the energy and environmental impact of three disposable blood pressure cuffs used in a single patient use model, manufactured by Welch Allyn, in order to 1. Leverage environmentally friendly designs to increase revenue and competitiveness 2. Understand the relative contribution of each life cycle stage to the total environmental impact 3. Understand how product design decisions influence environmental impact 4. Determine the optimal end of life option for each cuff
27 Cuff A Cuff Design Available with one or two attached tubesets Primarily made of PVC and nylon Cuff B FlexiPort eliminates tube set Primarily made of PVC, nylon, & polycarbonate Weighs 15% less than Cuff A Cuff C FlexiPort eliminates tube set Recyclable, made of 100% polypropylene Eliminate separate base material and loop Weighs 68% less than Cuff A & 61% less than Cuff B
28 Functional Unit 200 single patient use blood pressure cuffs, size adult large, with all required packaging Cuffs perform equally and perform the same function Cuffs manufactured by Welch Allyn in Skaneateles Falls, NY Cuffs are shipped through the same distribution channel to the customer, cuff distribution is the same for the cuff models, and the study is limited to US sales only Landfill and incineration end of life options were modeled Life cycle inventory data ecoinvent data v2.0 for: cuff and packaging materials & conversion processes, transportation impacts, energy impacts, landfill and incineration end of life impacts BUWAL 250 used for recycling processes: Welch Allyn & supplier manufacturing scrap, supplier component packaging, finished cuff packaging SimaPro 7.2 used to model the life cycles Impact Assessment Method: EcoIndicator 99 (H) to model Environmental Impact
29 System Boundaries Energy Raw Materials Process Chemicals Component Packaging Energy Raw Materials Process Inputs Hook & Loop Port Top & bottom Medical fluid Ink Energy Finished Cuff Packaging Transport Transport Transport Transport Transport Transport Scrap EOL Scrap EOL Cuff EOL Processes included in the boundary Processes excluded from the boundary Cuff Assembly (Welch Allyn operations) Transport Transport Transport Customer Transport Finished Cuff Packaging EOL Component Packaging Materials EOL Assembly Scrap EOL
30 Results Summary Life Cycle Environmental Impact Category Results
31 Results Summary Contribution to Life Cycle Environmental Impact, Incineration End of Life Cuff materials are the largest contributor Assembly energy is the smallest contributor Impact of packaging design decisions Dematerialization of Cuffs B & C results in transportation impact differences
32 How Design Affects Material Impact reduced part a eliminated part d eliminated part b
33 How Design Affects End of Life dematerialization (68% less matl vs Cuff A) + material change
34 Conclusions Mass and material type chosen in the design phase can significantly affect the cuff s environmental impact and energy demand Improvements in mass and material choice can affect the life cycle impact more than the EOL management strategy Future work to recycle the green cuff has the potential to further reduce its impact
35 Benefits of LCA Results used internally to understand & improve env impact of the cuffs Validate dematerialization and material choices made by product designers Understand the influence of Welch Allyn manufacturing operations and finished cuff packaging on the life cycle Identify operations throughout the life cycle that contribute significant impact which allows the design team to focus on those processes to further reduce the impact of future designs Results used externally to communicate env impact of the cuffs Validate & support environmental claims made by Welch Allyn Educate & assist customers in making more informed purchasing and end of life management decisions Additional benefits Educate internal employees and engage other departments and processes that were not involved in the LCA Through the inventory collection, Welch Allyn realized those suppliers dedicated to working with them to collect data and those that are not
36 Data collection Complex supply chains LCA Challenges How far back in the life cycle is data collected? Analysis can be time consuming, if data not readily available Engaging suppliers & end-of-use processors in data analysis Is data representative of the time? Geography? Production processes? Accuracy of results dependent on quality of inventory data Communicating results can be tricky Comparative LCA results are representative of one specific case and do not represent population of a product
37 LCA Recommendations Educate and rally team to understand LCA as a tool and reasons for its use Clearly define the goal & scope of the LCA Ensure the functional unit is clearly defined Build the LCA model with best data physically available Complete sensitivity analysis Use experienced and trained LCA practitioners Follow the ISO process to validate marketing claims and bring recognition to the study Stay up to date on LCA research, data sources, and modeling techniques
38 Questions & Discussion Anahita Williamson, PhD Director Phone: Kate Winnebeck, LCACP Sr. Environmental Health & Safety Specialist Phone: New York State Pollution Prevention Institute
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