Presentation on theme: "Dr. Hemant Pendse Michael Bilodeau Amy Luce February 4, 2015"— Presentation transcript:
1 Dr. Hemant Pendse Michael Bilodeau Amy Luce February 4, 2015 Technology Review of the Fiberight Process Submitted to the Municipal Review Committee (MRC)Dr. Hemant PendseMichael BilodeauAmy LuceFebruary 4, 2015
2 Scope of EffortLimited to conversion of MSW to biofuels and other productsDoes not include financial analysisKey aspects of the Fiberight technology reviewedSimilarity of equipment and process to existing commercial processes.Scaling of demonstrated technology to commercial scale.Demonstrated conversion of MSW organics to commercial products.Issues related to air or odor emissions, solid or liquid wastes.
4 Front-End Separation System Initial step separates ‘recovered recyclables’ from land fill stream.Hot water pulping aids in separation of organic and recyclable fractions.Both Separation steps use standard MRF equipment.Organic fraction is washed separating biomass intoSoluble fraction which is fed to anaerobic digesterInsoluble, cellulose-rich fraction which is fed to hydrolysis reactorInorganic waste stream which is land filled.
5 Conversion of MSW Organics Evaluated following proposed MSW organic conversion technologiesSoluble OrganicsWash water rich in soluble sugars converted to biogas via AD.Methane-rich biogas upgraded to pipeline gas standards or CNG.Insoluble OrganicsWashed, pre-treated cellulose solids enzymaticly hydrolyzedConcentrated sugar solution sold as product, orFermented into biofuels or other biomaterials.Biofuels from separated-MSW feedstock quality for RIN credits
6 Anaerobic DigestionA “liquid-only” anaerobic digestion (AD) system proposed.AD process producesclean water - internally reused in wash systemgenerates minimal digestatePilot operating experience with small commercial Voith AD unitVoith R2S reactor - 8,000 gallonCapacity of 1,320 lb COD/dayFeed limit of 500 ppm suspended solidsFiberight evaluating a Hydrothane AD systemExpanded Granular bed (EGB) AD systems.Higher suspended solids feed limit - up to 2,500 ppmTo be deployed in Fiberight’s Iowa plant
7 Enzymatic HydrolysisEnzymatic hydrolysis proposed to produce fermentable sugars.Thermo-mechanical pretreatment of washed MSW-derived pulp press cakepH adjustmentcooking at 260°F for 30 min in a pressurized vessel.Followed by low consistency refining and dewateringProduces clean and sterile MSW-derived pulp press cake.Very similar to Old Town plan for sugar production from Kraft pulp.Fiberight efficiency % vs % for virgin pulpLess efficient due to hornification of fibersUnhydrolyzed solids separated and dewatered to burn onsiteNo scale-up issues are anticipated for these operations.
8 Options for MSW derived sugars Conversion of MSW derived sugars to ethanolFiberight and Novozymes have completed bench scale conversions.C6 sugar conversion to ethanol is within industry standards.Ethanol from MSW derived sugarsProposed for Fiberight’s plant in IowaBut not for Fiberight’s plant in Maine.Concentrated simple sugar solution potential product for Maine plant.Alternative is supplemental biogas production via ADOpportunity in Maine due to high natural gas prices in winter monthsAlternatives avoid capital investment associated with ethanol production.Potential RisksCellulosic sugars are an emerging market.Transportation costsContamination during transport
9 Site infrastructure and permitting needs Mass and energy balance should be obtained and reviewed.Identify on-site waste water treatment and solid waste disposal needs.Emerging markets in Maine for end productsBiogas produced from ADCellulosic sugarsUnhydrolyzed biomassPossibility of accepting pulp or paper mill sludge to supplement MSWPermitting process could take 6 months to one year.Begin as soon as FEL 3 level completedProximity to Acadia National Park and Moosehorn Preserve could raise air emissions concerns.
10 Technology Readiness and Project Implementation Considerations Scale up risk for proposed Fiberight technology is low.Process equipment for converting MSW derived organicsDemonstrated at Fiberight’s Lawrenceville, VA pilot plantSufficiently similar to pulp and paper industry deploymentStrategic equipment suppliersVickers Seerdrum - continuous pulperMilnor - two stage washing unitAndritz - cooking and refiningProquip – mixingHydroThane - expanded granular bed reactors for the AD plantNovozymes - enzyme and technical supportNext steps for Maine projectDefine the scope of the projectReview final products – markets and end users/customers.Allocate resources required for planning, permitting and equipment purchase and installation
11 SummaryThe scope was limited to biological and chemical conversion of MSW to biofuels and other products.Economics of the Fiberight operation are outside the scope and have not been evaluated.FBRI conducted a detailed study including a site visit to Fiberight’s demonstration facility in Lawrenceville, VA.Subject matter experts were consulted for comparison to similar biofuel processes and to identify potential site location and permitting issues.
12 Summary (cont.)Fiberight’s processing technology is sound and capable of converting MSW organics to a simple sugar solution and biogas.Fiberight’s MSW-derived sugars have been converted to ethanol on a laboratory scale.Selection of final products will have a significant impact on project economics.Proposed equipment and processing steps are similar to those found in the pulp and paper and related process industries.
13 Summary (cont.)No extraordinary issues are anticipated in scaling the Fiberight technology to commercial scale.Potential odor issues are primarily limited to the front end - trash storage and processing.Air emissions would be associated with combustion technology selected for residual biomass and post hydrolysis solids.Fiberight’s experience in Iowa should prepare them in addressing winter operation issues.
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