13.15 Fermentations:Energetic and redox consideration ATP synthesis:Substrate-level phosphorylation底物水平磷酸化产生ATP Organic substrates ADP ATP ADP ATP Substrate-level phosphorylation Cell biomass Fermentation products (acids,alcohols,CO2,H2,NH3) Figure 17-49 Brock Biology of Microorganisms 11/e 2006 Pearson Prentice Hall,Inc.Chen Feng, Microbiology, SJTU 13.15 Fermentations: Energetic and redox consideration ATP synthesis: Substrate-level phosphorylation底物水平磷酸化产生ATP