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High Solids Anaerobic Digestion - International Biomass 2013
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High Solids Anaerobic Digestion - International Biomass 2013

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  • **Title?? ** Be sure to enter the name of the show and the title of the panel. Also, your name and title.
  • Anaerobic Digestion – We take the icky stuff out of garbage, turn it into a gas that can power cars, heat homes, or turn on the lights.
  • Cow and Digesters are similar Feedstock selection Grinding/pulping Digestion Biogas and soil amendment production Digestion is a multiple phase process including many kinds of microbes.
  • Where does the 57.5% of recovered yard trimmings go? – It doesn’t say specifically, but from other things and things that are said about yard waste on ABC site, I think most is composted.
  • Not all feedstocks are the same to anaerobic digestion. You’ll notice foods are listed to the bottom with higher gas yields and manures are to the top. This makes sense because to be perfectly frank, manure has already been digested once.
  • Added some that I think are good to point out for high solids – gas yield and stability. Also added two from our report for Mars – if you don’t like them, you can delete them.
  • Can handle higher solids, thicker liquids. May also make sense to include if the tip fee is strong.
  • Can include either solid or membrane roof depending on customer’s wants.
  • If asked, the panels on the side of the digester is an access door.
  • **Do we know what the percentage of total solids is for this plant? That would be a good point **Is there anything else about this plant that makes it a good story to tell?
  • **Do we know the percentage of total solids? **Anything else about this plant that make it a good story to tell?
  • **Do we know the percentage of total solids? **Anything else about this plant that make it a good story to tell?
  • **Do we know the percentage of total solids? **Anything else about this plant that make it a good story to tell? **Is there anything else we should include in the substrate?
  • Environmental Technology Air and water treatment Anaerobic Digestion General Finishing Painting auto bodies, wood, plastics Material Handling Moving autobodies and parts through factories Pallet distribution systems Process and High Temp High temp kilns Ceramic firing lines
  • Established in 1951 outside of Stuttgart Germany. Since, we have grown to 12 locations globally. Our US Office was one of the first locations outside of Germany and has been successfully completing projects for over 35 years. We are in Crystal Lake IL in the greater Chicago area. As I like to say it, we are where Chicago meets cornfields. We have 3,600 employees with the fast majority of engineers. To Date, we have 90 biogas facilities. And we are one of the founding members of the American Biogas Council who’s goals are promoting environmental stewardship, promoting greenhouse gas reduction, and policy development
  • **Should we include something here about Eisenmann being the biogas expert, or something along the lines that speaks to our experience? I don’t want it to be a sales pitch, but since this is at the very end. Thoughts?
  • **Change to your information.

High Solids Anaerobic Digestion - International Biomass 2013 High Solids Anaerobic Digestion - International Biomass 2013 Presentation Transcript

  • Anaerobic Digestion for High Solids Content2013 International Biomass Conference & Expo -The Dilution Solution: Using High Solids Anaerobic Digestion to Diversify Feedstock OptionsJohn McDowell, Sales Engineer www.eisenmann.com www.eisenmann.us.com © Eisenmann AG 2013 © Eisenmann 2013
  • Agenda 1 Anaerobic Digestion 2 High Solids Feedstock 3 High Solids Digestion 4 Reference Plants 5 About Eisenmann 6 Conclusions and Questions 2
  • Agenda 1 Anaerobic Digestion 2 High Solids Feedstock 3 High Solids Digestion 4 Reference Plants 5 About Eisenmann 6 Conclusions and Questions 3 View slide
  • Anaerobic Digestion Process…the degradation and stabilization of organicmaterial generating a mixture of methane andcarbon dioxide (called Biogas) by bacteria inan oxygen free environment. Biogas For electricity, heat, vehicles, pipeline Organic Digestion System Co-Products Material Soil amendments, Food and yard waste, nutrients, compost, agriculture waste livestock bedding 4 View slide
  • Biogas ProductionHydrolysis Acidogenesis Acetogenesis Methanogenesis Acidification phase Acetic acid formation Methane formation Pre-treatment Anaerobic fermentation Output Digested (in 4 phases) substrate Substrate input to anaerobic fermentation 5
  • Agenda 1 Anaerobic Digestion 2 High Solids Feedstock 3 High Solids Digestion 4 Reference Plants 5 About Eisenmann 6 Conclusions and Questions 6
  • Input Materials Organic input substrates supplied from:  Agriculture  Food processing facilities  Restaurant waste  Yard waste and grass clippings  Waste management facilities10 7
  • Municipal Solid WasteTotal MSW Generation (by Material)250 Million Tons (Before Recycling) 34 Million Tons of Foodwaste 33 Million Tons of Yard TrimmingsSource: US EPA, 2010 8
  • Municipal Solid Waste RecoveryTotal MSW Generation (by Material)Generated and Recovered Foodwaste • 34.76 million tons generated • 0.97 recovered • 2.8% recovery rate Yard Trimmings • 33.40 million tons generated • 19.20 recovered • 57.5% recovery rateSource: US EPA, 2010 9
  • ProblemIssues Vast number of organic substrates naturally occur around a level of 30% solids and higher Dilution is not desired as it increases the amount of effluent • Recirculating effluent can concentrate inhibitorsLow Solids Digestion Technology Requires low solids feedstock – up to 15% total solids Requires dilution of feedstock to allow mixing and avoid sedimentation in large vessels 10
  • Biogas Yield Biogas Yield Varies by Feedstock  Higher solid based feedstocks tend to yield a higher gas rate  Feedstock age also impacts Biogas Yield11 11
  • Agenda 1 Anaerobic Digestion 2 High Solids Feedstock 3 High Solids Digestion 4 Reference Plants 5 About Eisenmann 6 Conclusions and Questions 12
  • Benefits of High Solids Digestion Minimized feedstock dilution and recirculation rates Feedstock flexibility Allows for smaller footprint Maximum gas yield System stability Seamless system integration Increasing close-loop systems 13
  • Process Overview High Solids Contaminate Walking Floor Receiving Hall Wastes Removal Container Biogas Main Digester Substrate Receiving Substrate Preparation Storage Liquid Effluent Substrate Dosing Separator Biogas Composting Press Cake Digestate 14
  • High Solids Flow Schematic Post Digester Solids Separation Biogas Substrate Feed Consumer SubstrateConditioning Pump Room Main Digester Biowaste AD System 3D-Model 15
  • Substrate Conditioning - GrindingQuick grinding of larger size, inhomogeneous substrates Suited for yard and landscape waste 16
  • Substrate Conditioning - ScreeningLoosening, sieving, transport, removal of oversize contaminants Suited for green bin, yard, and landscape waste Star screen 17
  • Substrate Conditioning - ChainmillRotating chain links depackage and macerate substrateAvoids overshredding of packaging material for easier removal Suited for green bin waste streams 18
  • Substrate Conditioning - HammermillSubstrate is macerated and homogenized with hammermillOrganic material is macerated; packaging and contaminants are separated Suited for packaged pre- and post-consumer food waste and slaughterhouse waste 19
  • Substrate Feed System - SolidsProvides buffer storage of conditioned, high solids organic waste Suited for stackable and bulk materials 20
  • Substrate Feed System - LiquidReceiving pit and/or tanks for liquid organic materialsReceives and provides buffer storage Suited for all pumpable organic material 21
  • Main Digester - SteelContinuously mixed horizontal plug-flow digester for high solids organic wasteModular designInsulated with an internal heating system 22
  • Main Digester - ConcreteContinuously mixed horizontal plug-flow digester for high solids organic wasteModular designPrecast or cast in place constructionInsulated with an internal heating system 23
  • Horizontal agitatorContinuously mixes and homogenize substrateDesigned to continuously mix substrates with high total solids contentOptimizes proper gas releaseExternal bearings, low RPM 24
  • Digestate HandlingHose pumps and heavy duty piston pumps used to remove and convey digestate frommain digester vesselSuction pumps with less wear parts and easy maintenance Suited for digestate with lumpiness and high viscosity 25
  • Solids SeparationScrew press separators remove non-digestible solids Press cake – 30-35% total solids Press water – 8-20% total solids 26
  • Post digesterCovered vessel for residual gas productionProvides liquid effluent storage and biogas storageSize varies depending on storage requirementsSubmersible mixersDouble membrane gas storage 27
  • Biogas Consumer - Combined Heat & Power (CHP)Specially designed internal combustion engine powers generator for electricity productionElectricity can be used on-site or fed into utility or micro gridThermal energy used to heat digestion process, industrial processes or district heating 28
  • Biogas Consumer - UpgradingUpgrading can be achieved through highly selective membrane technologyRemoval of Carbon Dioxide to produce concentrated methane gasFed into utility pipeline system (RNG)Utilization as vehicle fuel (CNG) 29
  • Agenda 1 Anaerobic Digestion 2 High Solids Feedstock 3 High Solids Digestion 4 Reference Plants 5 About Eisenmann 6 Conclusions and Questions 30
  • Municipal Biogas PlantBuilt: Capacity: 12,000 t/yr Digester size: 212,000 gallons2010 Location: Biogas flow: 88 CFM Installed electrical capacity: 330 kW Switzerland Substrate: manure, post consumer foodwaste from green bin collection, yard waste, food manufacturing residueMain and post digester Biogas piping 31
  • Biogas Plant with Pushfloor DeliveryBuilt: Capacity: 20,000 t/yr2012 Digester size: 2 x 212,000 gallons Location: Biogas flow: 153 CFM Sweden Biogas upgraded to CNG, used to fuel public Substrate: transportation vehicles post consumer foodwaste from green bin collection, yardwaste3D Rendering Double concrete main digester with pushfloor substrate delivery system 32
  • Steel Biogas PlantBuilt: Capacity: 12,000 tons/year Digester size: 2 x 86,000 gallons2010 Biogas flow: approx. 165-176 CFMLocation: Installed electrical capacity: 620 kWItalySubstrate:slurry, chicken manure,diverse types of silage,olive press cake, waste animal feed 33
  • Urban Biogas PlantBuilt: 2013 – under constructionLocation: USA - Chicago Capacity: 5,000 tons/year (phase 1)Substrate: spent brewers grain,food waste Digester size: 86,000 gallons Biogas flow: approx. 42 CFM Installed electrical capacity: 105 kW at 30% 34
  • Agenda 1 Anaerobic Digestion 2 High Solids Feedstock 3 High Solids Digestion 4 Reference Plants 5 About Eisenmann 6 Conclusions and Questions 35
  • Leading International Supplier  Environmental technology  General finishing  Material handling & conveyor systems  Process and high-temperature technology1 36
  • Offerings  Green, sustainable engineering  Top quality and reliability  Modular and custom solutions  Detailed system and process solutions  Dedicated industrial service team  Worldwide reference installations  Global services2 37
  • Facts and Figures  Established 1951; Stuttgart, Germany  12 locations worldwide  US location since late 70‘s; Crystal Lake, IL  3,600 employees  More than 90 Biogas facilities Founding Member3 38
  • Eisenmann Biogas 39
  • Agenda 1 Anaerobic Digestion 2 High Solids Feedstock 3 High Solids Digestion 4 Reference Plants 5 About Eisenmann 6 Conclusions and Questions 40
  • Conclusions Organic waste makes up more than 27% of all municipal solid waste generated Organic waste is supplied from various sources Most organic substrates naturally occur around 30% total solids High solids digestion offers many advantages including minimum dilution, smaller footprint, and feedstock flexibility 41
  • Questions Green EngineeringSustainability is in Our System 42
  • New WebsiteIntroducing Eisenmann’s New Websitewww.eisenmann.us.com/biomass13Available for download: Today’s presentation CNG to Fuel your Fleet (white paper) Sustainability in an Urban Environment (white paper) 43
  • ContactJohn McDowellSales EngineerPhone: (815) 477-5335E-Mail: john.mcdowell@eisenmann.com150 East Dartmoor Dr. Crystal Lake, IL 60014www.eisenmann.us.comFollow Us: Eisenmann Corporation Eisenmann Corporation @EISENMANNUSA 44