PRODUCTION AND HANDLING OF DEHALOCOCCOIDES BIOAUGMENTATION CULTURES - Bioaugmentation for Groundwater Remediation - page 101

7.4

7.2

7

6.8

6.6

Nitrogen Sparge

6.4

6.2

6

0 5 10 15 20 25 30 35 40

Time (d)

Figure 3.5. Change of pH during growth of SDC-9 TM in a 4,000-L reactor. YE (0.1%) was added at
the beginning of the fermentation and again on day 22. Nitrogen sparging was conducted on days
25, 31, 32 and 33 to increase culture pH.

8

PCE-10,000 mg/L TDS
TCE-10,000 mg/L TDS
cis -DCE-10,000 mg/L TDS
VC-10,000 mg/L TDS
PCE-RAMM

7

6

TCE-RAMM

cis -DCE-RAMM

VC-RAMM

5

4

3

2

1

0

0 50 100 150 200 250 300

Time (min)

Figure 3.6. Effect of elevated concentration of TDS on SDC-9 TM dechlorination rates. NaCl was
added to RAMM medium to a final TDS concentration of 10,000 mg/L. The control samples were
prepared with only RAMM medium.