Presentation on theme: "Sustainable Approaches: Industrial Ecology and Pollution Prevention"— Presentation transcript:
1Sustainable Approaches: Industrial Ecology and Pollution Prevention Chapter 21Sustainable Approaches: Industrial Ecology and Pollution Prevention
21. Industrial Ecology Overview Industrial ecology refers to a multidisciplinary, systems approach to the flow of energy and materials between production and the environmentMain objectivesTo promote ways to use recycled waste from one production process as inputs in another processTo optimize material flows (i.e., achieve an efficient use of materials and energy in production)Since flow of materials is integral to industrial ecology, the materials balance model should be revisitedSustainable Approaches How to achieve sustainable development?—IE and P2
3Materials Balance Model Revisited At issue is whether the flow of materials from nature through the economy is linear, (i.e., operating in only one direction), and open OR cyclical and closed
4Conventional Linear (or Open) Materials Flow This “cradle-to-grave” open flow assumes materials run in ONE direction, entering as resources and leaving as wastes or residuals. Policy focus would have to be aimed at abating contaminants ONLY at the end of the flow.
5Linear (or Open) Materials Flow Policy based on a linear flow assumption does not fully address the long-run implications of pollutionNature’s capacity to convert matter to energy is limitedEnd-of-pipe policy controls take the form of abatement after the damage has been doneSolution should consider a cyclical flow approach
6Cyclical (or Closed) Materials Flow A cyclical flow assumes that…productive activity can be altered throughout the cycle to reduce environmental effectse.g., product design, manufacturing processes, energy useresiduals (i.e., wastes or pollution) can be brought back into useful productionImplies that policy can be aimed anywhere in the cycle of production and consumption rather than only at “end-of-pipe”
7A Closed System of Materials Flow A “cradle-to-cradle” flow that assumes materials run in a circular pattern in a closed system that allows residuals (or wastes) to be brought back into the production process.
8Using a Cyclical Flow in Practice a. Life Cycle Assessment (LCA) FYIExamines the environmental impact of a product or process at all stages from resource use to disposal4 componentsGoal definition and scoping: describes the product and environmental effects to be assessedInventory analysis: analyzes resource usage and environmental releasesImpact analysis: determines human & environmental effectsInterpretation: evaluates results and selects product/processAddressed by ISO International StandardsVoluntary standards in environmental management aimed at giving countries a common approach to environmental issues
9b. Industrial Ecosystems A Real-World Closed System Wastes from one production process are used as inputs in anotherUsually implemented through a collaborative of several firms, an eco-industrial parkReal-world examples include systems inKalundborg, DenmarkChoctaw, MS
11Industrial Ecosystem at Kalundborg, Denmark An industrial ecosystem has been established which involves an oil refinery, a wallboard plant, a pharmaceutical plant, fish farms, and a coal-fired power plant, among others.
12Industrial Ecosystem at Kalundborg, Denmark Steam and various raw materials such as sulfur, fly ash and sludge are exchanged in what is the world's most elaborate industrial ecosystem. Participating firms each benefit economically from reduce costs for waste disposal, improved efficiencies of resource use and improved environmental performance. For example, gas captured from the oil refinery which had previously been flared off is now sent to the electrical power station which expects to save the equivalent of 30,000 tonnes of coal a year.
132. Pollution Prevention (P2) Overview Pollution prevention is a long-term, front-end strategy aimed at reducing or eliminating the toxicity or the amount of residuals at their sourcePreventive objectivesSource reduction: reducing pollutants at point of generationToxic chemical use substitution: substituting less harmful chemicals for toxic ones
14How P2 Differs from Industrial Ecology P2 promotes risk reduction by eliminating or minimizing wastes, while industrial ecology uses wastes as inputsP2 solutions are aimed at a single firm, while industrial ecology is used by a collaborative of firmsP2 does not view recycling as preventive, while industrial ecology views recycling as the solutionP2 generally requires government oversight, while industrial ecology does not
15FYI P2 Techniques Source segregation Keep hazardous waste from mingling with nonhazardous wasteRaw materials substitutionUse inputs that result in little or no hazardous wasteChanges in manufacturing processesUse methods that generate fewer hazardous by-productsProduct SubstitutionUse relative safe goods instead of polluting products
16FYI P2 Legislation National Environmental Policy Act (NEPA) Encourages efforts to prevent environmental damageIntegrates pollution prevention into U.S. environmental legislationPollution Prevention Act of 1990P2 is the primary objective: “pollution should be prevented or reduced at the source, whenever feasible”The secondary objective is management of residuals through recycling, treatment, and disposal – in that orderSimilar legislation exists in other nations: EU, Canada, Australia
18Selected Corporation Examples of P2 Initiatives FYISelected Corporation Examples of P2 InitiativesDell, Inc.In 2008, reduced packaging by 5,440 tons; recycled and reused over 95 percent of nonhazardous wastes from manufacturing operations; recovered 116 million kilograms of discards. Offers free recycling of its products to customers worldwide. Committed to reducing its carbon intensity by 15 percent by 2012 relative to 2006.Anheuser-Busch Companies, Inc.Between 2003 to 2007, reduced hazardous waste by 15.8 percent and solid waste by 23.8 percent, with some of the latter accomplished through “light-weighting,” i.e., changes in packaging design. Reduced GHG emissions by 4.3 percent over the same period.Eastman KodakBetween 1999 and 2005, achieved a 44 percent emissions reduction of 30 priority chemicals and a 17 percent reduction in CO2 emissions; reduced energy use by 19 percent, water usage by 36 percent, and manufacturing waste by 47 percent.
19FYI Economics and P2 Cost-effectiveness as a criterion Whether a firm adopts P2 will depend in part on its cost relative to other options, like treatment or abatementIf P2 is chosen, cost-effectiveness can guide the selection of the appropriate strategyEfficiency as a criterionBenefit-cost analysis can be used to determine the extent to which a P2 strategy is implemented
20FYI3. Sustainable Initiatives and Programs (1) Extended Product Responsibility (EPR)Refers to efforts aimed at identifying and reducing life-cycle environmental effects of productsSometimes called Product StewardshipUnderlying premise is that all participants in the product chain—designers, manufacturers, distributors, consumers, recyclers, remanufacturers, and disposers—are responsible for a product’s effect on the environmentInvolves raw materials selection, production impacts, product use, products at end-of-life (i.e., take-back programs to achieve recycling or remanufacturing)
21(2) Design for the Environment (DfE) FYI(2) Design for the Environment (DfE)Promotes using environmental considerations with cost and performance in product development and designDirectly uses a cyclical flow of materialsUsed by BMW, Dell Computer, 3M, and others
22(3) Green Chemistry Program FYI(3) Green Chemistry ProgramPromotes development and use of chemical technologies that achieve pollution preventionSometimes known as benign chemistry or sustainable chemistry programsRecognizes the importance of a product’s life cycle in pollution preventionSeeks safer alternatives to hazardous chemicals, resulting in lower risks, safer production processes, and final products that pose less of a threat at the end of their economic lives
234. Global Information Sharing Technology Transfer FYI4. Global Information Sharing Technology TransferRefers to the advancement and application of technologies and strategies on a global scaleIs considered critical to consistent progress toward sustainable developmentRelies on interdependent factors that include research, physical capital investment, communication, financial resources, educationWho invented system? MIT played an important role.
24Achieving Environmental Literacy FYIAchieving Environmental LiteracyRefers to an awareness of the risks of pollution and natural resource depletionPromoting environmental education worldwide has grown and was an important theme at the Earth Summit in RioAgenda 21 specifically refers to the importance of education, public awareness, and training to implement the global agenda