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. 2021 May 29;14:125. doi: 10.1186/s13068-021-01968-0

Table 3.

Isotopic composition of carbon in substrates and products of Experiment 1 and Experiment 2, M1—domination of lactate, M2—domination of butyrate, M3—domination of propionate, M4—domination of acetate

Bioreactor δ13CSUB [‰] δ13C(CH4) [‰] δ13C(CO2) [‰] α13CCO2-CH4
Experiment 1
 M1 − 23.0 − 40.3 1.1 1.043
 M2 − 26.3 − 46.6 0.6 1.050
 M3 − 31.8 − 51.0 − 6.8 1.047
 M4 − 45.4 − 53.3 − 20.9 1.034
Experiment 2
 M1 − 23.0 − 36.2 4.1 1.042
 M2 − 26.3 − 46.1 6.6 1.055
 M3 − 31.8 − 57.0 − 5.4 1.054
 M4 − 45.4 − 57.2 − 33.4 1.026