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How to MakeBiomass-to-EnergyWork in Rural AlaskaJeff CoombeKeith HennAl RandallApril 29, 2014www.tetratech.com
Tetra Tech Alaskan Project Experience3 Office Locations – Anchorage, Fairbanks, JuneauHelioTech JV – Alaska Native Corporation 8(a)
Tetra Tech Works With Tribal GroupsCherokee NationCheyenne River SiouxCheyenne-Arapaho Tribes of OklahomaChippewa Cree Tribe of the Rocky BoysReservationCrow Creek Sioux Tribal CouncilFlandreau Santee Sioux TribeFort Peck TribesHo-Chunk NationIowa Tribe of Kansas & NebraskaKeweenaw Bay Indian CommunityKickapoo Tribe of KansasKickapoo Tribe of OklahomaLac Courte Oreilles Band of Lake SuperiorChippewa IndiansLac du Flambeau Band of Lake SuperiorChippewa IndiansLac Vieux Desert Band of Lake Superior andChippewa IndiansLeech Lake Band of OjibweLower Brule Sioux TribeLower Sioux Indian Community of MinnesotaMenominee Indian Tribe of WisconsinMiami Tribe of OklahomaMille Lacs Band of Ojibwe IndiansNorthern ArapahoNorthern Cheyenne TribeOglala Sioux TribeOmaha Tribe of NebraskaOsage NationOttawa Tribe of OklahomaPonca Tribe of NebraskaPrairie Band Potawatomi NationPrairie Island Indian CommunityRed Cliff Band of Lake Superior Chippewa Indians ofWisconsinRed Lake Band of Chippewa Indians of MinnesotaSac & Fox Tribe of the Mississippi in IowaSantee Sioux NationShakopee Mdewakanton Sioux Community ofMinnesotaShawnee TribeSpirit Lake NationStanding Rock Sioux Tribal CouncilTurtle Mountain Band of ChippewaThree Affiliated TribesUpper Sioux Community of MinnesotaWhite Earth Tribal CouncilYsleta del Sur Pueblo3
Selecting the Correct BoilerProject PillarFeedstockSupplyOptimal PlantSizingKey Project Attribute Source and Impacts BTU content vs moisturecontent Consistency vs. variety ofmaterials Toxics / carcinogens Energy Off TakesElectrical LoadingThermal LoadingMass & Energy BalanceSite and Project Footprint4
Feedstock - Categories Waste Biomass Municipal Solid Waste (MSW) Organics – Food waste Fiber – Paper, Cardboard, Wood(RDF) Construction & Demolition (C&D) Woody Biomass Chip wood (pulp-and-paper industrystandard chip spec) Stewardship & stand thinning Logging slash Mill residues (sawdust & other waste) Fuel wood5
Feedstock – MSW Unsorted MSW Widely available Difficult to handle / process Separation Steps Needed ! Higher quality of Feedstock - consistent, homogenous Difficult to implement / reduced capture volume Construction & Demolition Waste and UrbanWood Wood, paper, cardboard focus Potential for EPA‘Biomass’ Designation6
Material Recovery Facility (MRF) MSW MRF 20,000 tons/yr min throughput Metals recycling primary C&D MRF Aggregate recycling Shingles to hot mix Value-addedRecycling7
Feedstock - Construction & Demolition 30-50% woody materialNegative-cost feedstockValue-added byproducts Metals, aggregate, shinglesSource: Illinois Sustainable Technology Center8
Feedstock – Woody BiomassProductLoggingResidueMill ResidueThinning /StewardshipChip wood Logging Residues - Slash Mitigation Forest Hazard Mitigation Secondary Growth Market Beetle Kill9
Biomass to Energy Technology Technology spectrumBasic Combustion(Simple) Hybrid GasificationGasification(Complex)Products Produced Thermal Heat Combined Heat and Power (CHP) Electricity for Operations ( 1 to 10 MW) Heating / Hot Water / Cooling Syngas / Pyrolysis Oils / Liquid Fuels10
Thermal or Electrical Energy11
Residential Wood Gasification BoilersCourtesy: Tarm12
Multi-Fuel Boilers (Wood / Oil / Coal)Courtesy: Alternate Heating(E100 WoodGun)Courtesy: ATMOS (DC 18 SPL,DC 25 SPL, DC 32 SPL)Courtesy: Biomass NExtGen13
Community-Scale Gasifiers14
Hybrid GasificationCourtesy: Eco Waste Solutions15
Hybrid GasificationPro’s Accepts plastic andcontaminants Higher efficiency overcombustionCourtesy: EnvikraftCon’s Higher CapEx 10MM Minimum size 2MW CHP More complex16
Courtesy: Eco Waste Solutions17
Drivers for Bioenergy & Waste to EnergyEnergy, Savings & Jobs Electricity in remote locations (Kotzebue – 42 /kWh) Diesel Prices - 6 to 10 / gallon Landfills High operation costs & tipping fees SE AK – secondary growth marketsSecure Power and Landfill/Waste Diversion Local, Base load PowerRecycling, Landfill diversion, value-added byproductsJob Creation & “Economic Clusters”Funding Sources Available18
Take Home Message! Bioenergy / WtE are proven technologies Bioenergy / WtE uses local waste resources Systematic Evaluation process is requiredOne size does not fit all Bioenergy / WtE can work in many rural towns ! !19
Thank you!Jeff CoombeJeff.Coombe@tetratech.com20
Lower Sioux Indian Community of Minnesota Turtle Mountain Band of Chippewa . Material Recovery Facility (MRF) . Source: Illinois Sustainable Technology Center. Feedstock - Woody Biomass 9 Product Logging Residue Mill Residue Thinning / Stewardship Chip wood Logging Residues - Slash Mitigation Forest Hazard Mitigation Secondary Growth Market
