TABLE 1.

First-order biodegradation constants and half lives

Treatment groupMean TCE and cDCE reduction and production biodegradation constants (day) ± SEMa
TCE reductioncDCE productioncDCE reductionVC production
Protists absent−0.120 ± 0.018 (5.7)+0.184 ± 0.024NDND
Protists presentNDNDNDND
KB-1 + protists−0.589 ± 0.190 (1.2)+0.817 ± 0.263−0.184 ± 0.018 (3.8)+0.059 ± 0.013
  • a ND, not detected. Half-life values are indicated in parentheses in days.