Biological Reduction of Perchlorate from Spent Modified Reed Mediated by an Enriched Microbial Culture

Table 2

Perchlorate removal during EMC enrichment and during the establishment of steady-state removal.

Stage cycle date	Days in culture	ClO4^− (mg/L)
Initial acclimatization
Cycle #1
1/22/2009	0	847.15 ± 3.43
1/27/2009	5	BD
Cycle #2
1/27/2009	5	802.47 ± 2.10
1/30/2009	8	BD
Cycle #3
1/30/2009	8	807.15 ± 1.40
2/2/2009	11	BD
Cycle #4
2/2/2009	11	804.65 ± 2.34
2/4/2009	13	BD
Approaching steady state
Cycle #9
1/22/2009	32	798.15 ± 1.77^†
1/27/2009	33	BD
Cycle #10
1/27/2009	33	788.15 ± 2.33
1/30/2009	34	BD
Cycle #11
1/30/2009	34	782.18 ± 2.20
2/2/2009	35	BD

BD, below detection; EMC, enriched microbial biomass.