北京化工大学：《生物工艺学》课程电子教案（PPT课件）Chapter 11 Microbial Energy Conversion Processes

0时 Chapter 11 Microbial Energy Conversion Processes

Chapter 11 Microbial Energy Conversion Processes

Bioenergy Renewable:fossil fuel Environmental friendly Waste reduction Ethanol Biodiesel H2 Methane

Renewable: fossil fuel Environmental friendly Waste reduction Ethanol Biodiesel H2 Methane Bioenergy

11.1 Methane 11.1.1 Methanogens Methanogenic archaebacteria Order Order Order Methanobacteriales Methanococcales Methanomicrobiales Genus: Genus: Genus: Methanobacterium Methanococcus Methanomicrobium Methanobrevibacter Methanogenium Methanosphaera Methanospirillum Methanothermus Methanosacina Methanococcoides Methanolobus Methanococcus Halomethanococcus Methanothrix

Methanogenic archaebacteria Order Order Order Methanobacteriales Methanococcales Methanomicrobiales Genus: Genus: Genus: Methanobacterium Methanococcus Methanomicrobium Methanobrevibacter Methanogenium Methanosphaera Methanospirillum Methanothermus Methanosacina Methanococcoides Methanolobus Methanococcus Halomethanococcus Methanothrix 11.1 Methane 11.1.1 Methanogens

C02 2e- HCO-MFR HCO-H MPT H20 2e- 5,10-(=CH-H4MPT CH3-S-CoM /2e CH2=H4MPT CH3H4MPT←2e Reduction of carbon dioxide to methane in Methanobacterium thermoautotrophicu HCO-MFR formyl-MFR;HCO-H4MPT formyl-H4MPT;5,10-(=CH)-H4MPT =5,10 methenyl-H4MPT;CH2=H4MPT=methylene-H4MPT;CH3-H4MPT=methyl-H4MPT

11.1.2 Ecology of methane production Complex organic compounds Various organtsms Soluble organic compounds Fermentotive Propionate bacteria Butyrate Lactete Ethanol H2*c02 Acetogenic bacteria Acetate Methanogenic bacteria CH4+CO2 Methane production-a three stage process

11.1.2 Ecology of methane production

Glucose ADP NAD+ ATP+ NADH +H* Pyruvate .Fdox CoA NADH +H 工+ NAD* QVN H+ Fdred C02 AcetylCoA Acetaldehyde CoA+ P CoA NADH+H+ Acetyl-P ADP →NAD+ Ethanol) ATP+ Acetate Fermentation of glucose by Ruminococcus albus.Fdred=reduced ferredoxin.Fdox= oxidised ferredoxin

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甲烷的产生和制备工艺 沼气池示意图

11.2 Hydrogen gas Hydrogenase 1mol glucose----12 mol H2 Anaerobic fermentation: Aerobic fermentation: Photosynthesis:agae Formation of H2 to methane coenzyme F420,methanofuran,Coenzyme M

Hydrogenase 1mol glucose ----12 mol H2 11.2 Hydrogen gas Anaerobic fermentation: Aerobic fermentation: Photosynthesis: agae Formation of H2 to methane coenzyme F420， methanofuran， Coenzyme M

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氢能利用原理图

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