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Anaerobic Digestion Sybil Sharvelle Associate Professor Colorado State University
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Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

Jul 20, 2020

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Page 1: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

AnaerobicDigestion

SybilSharvelleAssociateProfessor

ColoradoStateUniversity

Page 2: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

PresentationOverview

• Anaerobicdigestion(AD)process• ADtechnology• Usesforbiogas

Page 3: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

AnaerobicDigestionProcess

AnaerobicDigester Liquid

Fertilizer

Compost

CH4

Page 4: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

ADProcess

•BiologicalProcess•Applicableforhighorganiccontentwaste

• Inabsenceofoxygen,carbonisconvertedtomethane

•Worksbestat35oC

Source: Renewable Energy Association

Page 5: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

ADProcessSchematic

Hydrolysis

Acido/Acetogenesis

Methanogenesis

Solubleorganiccompounds

Methanebiogas

Aceticacid

Biodegradablewaste

Page 6: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

TechnologyDependsonWasteQuality

• OrganicFractionMunicipalSolidWaste• Highsolids• InorganicContaminants

• Manure• Dependsonmanagementpractice

• LiquidWastewater(e.g.foodprocessing)• Lowsolidsandhighorganicmatter

Page 7: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

MunicipalSolidWastes

Page 8: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

MunicipalSolidWastes:LandfillBasedDigester

YoloCounty,California

Page 9: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

MunicipalSolidWastes:AdditiontoAnaerobicDigester

EastBayMunicipalUtilityDistrict

Page 10: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

https://erams.com/AD_feasibility/

Page 11: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

AD:HighOrganicLiquidWasteMaterial

Upflow SludgeBlanket FixedFilm

FixedFilmAnaerobicDigester

0-1%TS

Inlet

Outlet

UpFlowAnaerobicSludgeBlanket

Digester1-5%TS

Inlet

Outlet

SludgeBlanket

Page 12: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

NewBelgiumBreweryAnaerobicDigester

Page 13: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

RegionalBiodigester:HeartlandBiogas

•WeldCountynearLaSalleCO

•4,700MMBtu•PowerPurchaser:SacramentoMUD

Page 14: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

UsesforBiogas

MethaneGas

Cogeneration

Electricity Hot Water

Purification to SupplyNatural Gas Lines Boiler

Purification and

Liquifaction

Page 15: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

PurificationforNaturalGasPipeline

• Organics(siloxane),waterremoved

• H2Sreducedto5ppm• CO2 Removal

Source: SEECO

Page 16: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

VehicleFuel

Page 17: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

Comparision toOtherFuels

Source:NGVA,2009

Fuel LHV (MJ/kg) CO2 (g/kWh) TheoreticalCO2Reduction (%)

Methane/Biomethane 50.0 198.0 29.2

Propane 45.6 236.8 15.3

Butane 45.3 241.2 13.7

Diesel 42.7 267.5 4.3

Gasoline 42.4 279.5 0.0

Page 18: Anaerobic Digestion - Yampa Valley Sustainability Council · 2017-03-07 · biogas Acetic acid Biodegradable waste. ... Purification to Supply Natural Gas Lines Boiler Purification

Summary

• Anaerobicdigestioncreatesvaluableproductsfromwastematerial

• Technologyselectiondependsonwastematerial• Manyusesforbiogas