METODE LCA: LIFE CYCLE ANALYSIS dalam KAJIAN LINGKUNGAN

1. METODE LCA: LIFE CYCLE ANALYSISdalamKAJIAN LINGKUNGAN Diabstraksikanoleh: Nunuk L.H., N. Akhmad, E. Sunaryono, danSoemarno PSDL-PDKL-PPSUB Januari 2013

2. LIFE CYCLE ANALYSIS Analysis of Environmental, Financial and Social Impacts throughout the Life-cycle of Products and Processes

3. LCA • The Concept of Environmental LCA • Methodology of Environmental LCA; • Goal and Scope • Inventory Analysis • Impact Assessment • Interpretation • Extending the scope of Environmental LCA; • Economic LCA • Social LCA

4. KONSEP LCA • Products do no pollute, but their production, use and disposal do! • Product systems are composed of interrelated processes Life Cycle of Product Systems (Source: USEPA, 2006. Life Cycle Assessment: Principles and Practice, Cincinnati, Ohio report no. 45268

5. KONSEP LCA Some products have a dominating environmental load in production, some in use, some in disposal: Examples: cars, television, airco etc. Examples: Ni-Cd batteries, household chemicals, fireworks etc. Examples: books, furniture, art etc.

6. KONSEP LCA • Environmental LCA is the quantitative assessment of environmental impacts of products or processes over their life cycle. • LCA is the analysis of the contribution of lifecycle stages, product parts or processes to environmental burden. • LCA is often used to compare between products or design alternatives. • Applications of LCA: • Product improvement • Support for strategic choices • Benchmarking • External communication

7. KONSEP LCA • LCA is a model of a complex reality! • …of an average lifecycle of a mass product • …of the effect of all impacts that occur • …of their interaction. • Any model is a simplification of reality: If you make a model, you must specify the goal and scope describing why you want to make the model.

8. METODOLOGI LCA • Goal and Scope definition • Inventory Analysis • Impact Assessment • Interpretation The official LCA framework according to the International Standards: ISO 14040:2006 and ISO 14044:2006

9. METODOLOGI LCA • Questions: • What is the intended application of the LCA? • How much effort do you want to invest? • Who are interested parties? • What methodology will you use? • Why is a goal and scope definition important? • guidance in data collection phase • communication base for data providers • reference for data quality management. • afterwards, to explain how choices have been made during the various LCA phases.

10. METODOLOGI LCA • Definition of functional unit, initial system boundaries and procedural aspects • Functional unit: comparison of products on the basis of equivalent function, for example: comparison of 2 packaging systems for 1000 litres of milk by (a) 1000 disposable cartons or (b) 100 reusable bottles; instead of comparison of 1 carton and 1 bottle. • Functional unit is basis for comparison “Compare environmental impacts of packaging of 1000 litres milk in carton packages or glass bottles” ? =

11. METODOLOGI LCA • Definition of functional unit, initial system boundaries and procedural aspects • System boundaries: definition of processes that are included in the investigation, e.g. material extraction, processing and transport; energy production; disposal processes. Production of capital goods (equipment used for production and transportation) are often excluded from the system. System boundaries are further defined during the inventory process. • Procedural aspects: organizational arrangements such as a critical review to guarantee consistency, scientific validity, transparency of the final report and how various stakeholders will be involved in the process (LCA is a participatory process)

12. METODOLOGI LCA: INVENTORY Also referred to as Life Cycle Inventory (LCI) phase Compiling and quantifying of inputs and outputs Collecting of data, determination of total emissions and resource use Detailed defining of product system and economy-environment boundary. Only data collection for processes that are controlled by human beings (economic processes). Examples: coal mining, electricity production, controlled dumping of solid waste etc. Visualizing connected processes in product system Scaling of available technical data (e.g. fromdata libraries) to functional unit Aggregating the inputs and outputs in Inventory Table

13. METODOLOGI LCA: Inventory Example of Product system and Inventory Table electricity incineration steel production distribution use dump plastic reuse recycling

14. METODOLOGI LCA: Inventory • Difficulties: • Data availability and quality • Data rarely available, usually special data gathering studies needed • Measurement procedures rarely standardized • Geographic variations • quality of raw materials/energy sources • production methods • relevant environmental impacts • Technology • Which type of electricityproduction? • Salt Electrolysis with Mercury or Membrane process? • Oldest, average or modern Waste Incineration Plant?

15. METODOLOGI LCA: Inventory • Difficulties: • Allocation of environmental interventions in case of multiple output processes; • Many processes are ‘multifunctional’ (e.g. co-production, combined waste treatment.) and interventions can be allocated to more outputs: • Recycling and reuse • Allocation determined by number of reusetimes and fraction of materials that can be recycled at a certain quality Recycling Electricity production Chlorine Plastic bag use Plastic production Salt electrolysis Paint production Old plastic Caustic Soda

16. METODOLOGI LCA: PendugaanDampak LCI result Depletion Raw materials Land use CO2 VOS P SO2 NOx CFC Cd PAH DDT Land use Climate change Acidification Eutrophication Ecotoxicity Humantoxicity • Also referred to as Life Cycle Impact Assessment (LCIA) • Linkage (long) list of LCI results to environmental impacts, like climate change, acidification, eco-toxic impacts etc.

17. METODOLOGI LCA: PendugaanDampak • Steps: Characterization, Classification and Normalization: • Determine which LCI results contribute to which impact category, e.g. CO2 and CH4 to climate change • Multiply environmental interventions (resources, emissions etc.) from LCI with a characterisation factor to get indicator results • Normalize to understand the relative magnitude of the indicator results and to get dimensionless score (useful for comparison) Impact category Cat. Indicator result (kg CO2 equivalent) Char. Factor (Global Warming Potential)

18. METODOLOGI LCA: PendugaanDampak Intervention Effect Damage CO2 P SO2 NOx DDT Dust VOC Cd PAH CFC Greenhouse effect Eutrophication Damage to Eco-systems Acidification Pesticides Indicator Winter smog Summer smog Damage to human health Heavy metals Carconogenics Ozone layer depl. • Category indicators are quantifiable representations of impact categories (ISO) and are defined according standards, such as CML-IA, Eco indicator 99, Impact 2002+ etc.)

19. METODOLOGI LCA: PendugaanDampak • A ‘high’ contribution to a certain impact category (a high normalized score) does not automatically mean an ‘important’ contribution  weighing of results is needed • Weighing is a valuation of results and thus a normative process, depending on preferences of researcher; which environmental impact is most important? • Procedure of LCIA according to ISO: • Classification and characterisation are an obligatory step. • Normalisation is an optional step. • Weighing is only permitted for internal decision making, and not for comparison of products to the public.

20. METODOLOGI LCA: Interpretasi • “Phase of life cycle assessment in which the findings of either the inventory analysis or the impact assessment, or both, are combined consistent with the defined goal and scope in order to reach conclusions and recommendations” (ISO) • To interpret an LCA, you must check the goal and scope: • Are the the general assumptions reasonable? • Is the functional unit well chosen? • Are ISO standards applied? • Has a peer review been conducted?

21. METODOLOGI LCA: Interpretasi • Conduct a sensitivity analysis: analyze the impact of important choices or assumptions • What if other allocations are applied. • What if other boundaries are applied. • What if other impact assessment method is used. • By recalculating the LCA with other assumptions, we can verify how the conclusionsconnect with the assumptions.

22. LCA diperluas: • LCA is often associated with environmental impacts, but scope can be extended to include economic and social impacts. • Financial LCA = Life Cycle Costing (LCC); • Analysis of life cycle costs • Social LCA • Social impacts throughout life cycle of products and processes

23. LCA diperluas: • What are the costs and revenues incured during the life cycle of a product or process? • R&D • Production • Marketing • Sales • Etc. • Sometimes external costs included as well (costs that are ‘imposed’ on society or the environment): • Monetary valuation of environmental LCI and LCIA results…but is it possible to monetise all environmental services?

24. LCA diperluas: • Social LCA analyses social impacts, such as employment and health: • Job quality • Quality physical health • Quality social health • Earthly possessions • Challenging to model social life cycle impacts, because social conditions do change more rapidly • impacts from changes in employment conditions may dissipate • emotions resulting from changes disappear with time • diseases get cured • people who are laid off may find new jobs)