TABLE 1

Summary of experimental design, bulk 13C incorporation, substrate utilization and accumulation levels, and sequenced samples

TABLE 1
  • a Run 1 was initiated with inoculum 1, and run 2 was initiated with inoculum 2.

  • b Removal and accumulation rates were estimated from daily NH4+, NO2, and NO3 measurements. NO2 removal was calculated based on ammonium removed (except for columns 5 and 6, where it was based on influent nitrite). NO3 accretion was calculated based on ammonium removed (except for columns 5 and 6, where it was based on nitrite removed). ND, differences between influent and effluent NO3 concentrations were not significant, and accretion could not be calculated. NA, not applicable.

  • c Bulk ratio in columns after 15 days, as determined by EA-IRMS.