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I noticed that EMP produces 2 ATP and EDP produces 1 ATP. Does that mean that if more ATP is present that would give more energy for fermentation and lowering the pH of a system?

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    $\begingroup$ You need to explain clearly what you are talking about, avoiding abbreviations. Why do you think fermentation requires energy? What type of microorganism are you concerned about? What is the relevance of the pH? At the moment your question is incomprehensible. $\endgroup$ – David Oct 29 '19 at 20:19
  • $\begingroup$ I'm thinking about the oral community and if utilizing the Embden–Meyerhof–Parnas Pathway more than the Entner–Doudoroff pathway could result in a lower pH. $\endgroup$ – O.rka Oct 29 '19 at 21:37
  • $\begingroup$ To repeat, why do you think fermentation requires energy? It produces it. $\endgroup$ – David Oct 30 '19 at 15:52
  • $\begingroup$ @David I guess he/she meant more fuel/substrate for fermentation, or more free energy to drive the process... $\endgroup$ – The Quark Dec 1 '19 at 12:41
  • $\begingroup$ @O.rka An underlying question would be what is the limiting factor that would stop fermentation assuming a closed system. Or maybe the question is about the balanced pH in a chemostat when one or the other pathway is imposed? $\endgroup$ – The Quark Dec 1 '19 at 12:42