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Table 2

Electron balance of the BES process (data derived from the day 6 operation as shown in Fig. 5).

  Unit  
Working volume L 0.35
Gas inflow per reactor volume L/L/d 3.4
Actual gas inflow L/d 1.19
CH4 content % 50
CH4 inflow L/d 0.595
CH4 inflow mmol/d 24.3
Current mC/s 47.2
Electrons (e) mmol/d 42.3
Extra CH4 from e mmol/d 5.3
Extra CH4 from e L/d 0.13
Theoretical CH4 content (1) % 61
Actual CH4 content (2) % 80

(1) Theoretical CH4 content calculated from reduction of CO2 by electrons assuming no CO2 was absorbed in the process; (2) Actual CH4 content in the outflow gas.

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