1 / 23

Porto, September 23 rd , 2009

Ricardo Cavalcanti Furtado Environmental Planning Manager Empresa de Pesquisa Energética. Porto, September 23 rd , 2009. Biomass for Energy Generation: Environmental Issues. Empresa de Pesquisa Energética.

wilda
Télécharger la présentation

Porto, September 23 rd , 2009

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ricardo Cavalcanti Furtado Environmental Planning Manager Empresa de Pesquisa Energética Porto, September 23rd , 2009 Biomass for Energy Generation: Environmental Issues

  2. Empresa de Pesquisa Energética Government-owned company, linked to the Ministry of Mines and Energy, instituted by Law n° 10.847/2004 EPE has been created to develop studies and research to support the energy sector planning in the areas of electric energy, oil and natural gas and its derivatives, mineral coal, renewable energy sources and energy efficiency

  3. Energy Planning in Brazil

  4. Brazilian Power Sector Planning HIGH PROPORTION OF HYDRO POWER LONG TRANSMISSION LINES INTENSIVE CAPITAL LONG TERM INVESTMENTS HIGH UNCERTANTIES MULTIPLE OBJECTIVES COMPLEMENTARY GENERATION SEASONALITY ENVIRONMENTAL ISSUES RISK ANALYSIS FAIR TARIFF DIVERSITY INTEGRATION ENERGY SECURITY

  5. Planning Process STRATEGY VIEW LONG TERM STUDIES (30 YEARS AHEAD) NATIONAL ENERGY PLANNING NATIONAL ENERGY OUTLOOK PROGRAMMING VIEW SHORT AND MEDIUM TERM STUDIES (10 YEARS AHEAD) TEN YEAR ENERGY PLANNING AUCTIONS Crude Oil and Natural Gas Electric Power Transmission Biofuels

  6. Scenarios for Electricity 2030 (GW) 7,9 GW Source: PNE 2030

  7. Energy in Brazil – Energy Sources Share Source: National Energy Balance. EPE, 2008

  8. Energy in Brazil – Energy Sources Share Ethanol Bagasse Straw Vehicles Cogeneration Charcoal consumed by blast furnaces. Source: National Energy Balance. EPE, 2008

  9. TransmissionLines Existing System Planned System - 2017

  10. Biomass

  11. Biomass participation in the Energy Auctions Environmental Information Analysis in the auctions • Plant carachteristics • Environmental licensing • Reserve of water availability and allowance for water use

  12. Main environmental issues: Food competition Land use on expansion areas Energy Balance Emissions Solid waste Liquid effluents Water consumption Employment (quantity and quality) The ethanol/sugar production chain

  13. Caatinga Amazon Savanna Pantanal Mata Atlântica Current sugarcane production and expansion perspectives Source: EPE, 2009 based on Municipal Agricultural Research developed by IBGE 2006 Source: EPE, 2009. PDE 2008-2017

  14. The National Agro-ecologic Zoning for the sugarcane harvesting will determine the most appropriate areas to expand the sugarcane production (under development – coming soon) Soil Climate Environmental issues Where to expand? Agroecologic zoning - SP • It’s desirable that the expansion occurs on non-productive areas such as abandoned crop fields and pasture areas Suitable Suitable with environmental limitations Suitable with environmental constraints inappropriate Example of Agro-ecologic zoning developed by SP Government (2008)

  15. Sugarcane can be considered as food (sugar and other products), but the part destined to ethanol (today ~55%) doesn’t compete with this purpose Some studies, based on satellite images (INPE/CANASAT), have found that the last 4-year expansion occurred mainly over consolidated agriculture and pasture areas The production of grains, rice, fruits (almost all) has increased continuously Currently, in Brazil, the sugarcane production does not influence food prices Food competition

  16. Energy Balance • The sugarcane provides one of the best energy balances in bioethanol production • The energy “Output/Input” index in the Life Cycle of sugarcane ethanol = 8.1 • The bagasse cogeneration ensures the energy self-consumption (power, mechanic and thermal) in the sugar/ethanol plants • The power excess can be sold for the Interconnected System (Auctions)

  17. Emissions • In Brazil, ethanol (hydrous and anhydrous) substitutes a great amount of gasoline consumption. As consequence, even taking into account the life cycle emissions, it avoids significant amounts of GHG emissions • The use of biofuels also reduces the SOx, particulates and VOC emissions in comparison with gasoline and diesel • Burning of straw in the field facilitates manual sugarcane picking. However it causes air pollution in regional scale. Recently, regulation and agreements established a schedule to gradually mechanize the sugarcane picking

  18. Solid waste and liquid effluents • Technically, bagasse and straw can be considered as co-products of sugarcane production. Both can be used for energetic purposes. Part of the straw is also important for soil covering • Currently, the vinasse (high BOD) produced is destined for the crop field in substitution for chemical fertilizers • Other liquid effluents can be easily treated before released on the environment (rivers) Vinasse sluice - Usina Coruripe, AL

  19. Water consumption • In Brazil, sugarcane harvesting doesn’t need irrigation. However, sugar/ethanol plants consume a significant amount of water • Water consumption – national average • 1997 = 5,0 m3/t.sc • 2008 = 1,0 – 2,0 m3/t.sc • New plants = 0,7 – 1,0 m3/t.sc Sugarcane washing • The water availability is one of the main environmental constraints on new plants licensing, particularly in the Southeast Region

  20. Employment • Sugarcane manual picking requires a large number of workers. However, these jobs are extremely exhaustive and don’t need schooling (low level income) • The mechanization of sugarcane picking will certainly reduce the number of jobs in the sector. This will create better jobs (salubrity and level income) Sugarcane manual picking • There are public and private initiatives to regulate the social aspects of sugar/ethanol production chain in Brazil. An international certification system could guarantee this goal

  21. Other possibilites in bioenergy • Increasing the use of sugarcane straw in cogeneration • Ligno-celullose ethanol • Biogas from sewage, biodigestors and landfill • Woodchips and agriculture scraps • Elephantgrass for power generation • Biodiesel from vegetable oil, fried oil, tallow and other fatty raw materials

  22. Conclusions • Today, biomass power generation in Brazil uses predominantly sugarcane bagasse as fuel • Sugarcane bagasse is a co-product of the sugar/ethanol production chain • Currently, the sugarcane production does not affect the Amazon and Pantanal areas • The expansion areas for sugarcane will be determined by the Agro-ecologic Zoning • The Brazilian sugar/ethanol industry manages the most of environmental impacts in sugar/ethanol production chain • Brazil has a great potential on bioenergy

  23. Ricardo Cavalcanti Furtado Superintendente de Meio Ambiente Empresa de Pesquisa Energética www.epe.gov.br

More Related