Bioslurping technology applications at naval middle distillate fuel remediation sites
- Naval Facilities Engineering Services Center, Port Hueneme, CA (United States)
- Battelle Columbus, OH (United States)
Bioslurping technology, a combination of bioventing and vacuum-enhanced free-product recovery of light, nonaqueous-phase liquid (LNAPL), has been employed at Fallon Naval Air Station, Nevada, for over 2 years and was initiated at Marine Corps Base Hawaii and a radar station near Hofn, Iceland. These sites have low-volatility fuels on the groundwater table in low- to medium-permeability soils. LNAPL recovery rates from 48 wells in silty fine sand to clay loam profiles at Fallon have ranged from 57 to 227 L/day with an average of 170 L/day at 10 to 30 cm of mercury vacuum. Mass discharge from the bioslurper system for LNAPL and vapor averaged 97% and 2.7%, respectively, with an average soil gas extraction rate of 0.024 m{sup 3}/min. Based on periodic soil gas analyses from 90 isolated soil gas sampling points in the vadose zone of the treatment plot, bioslurping appeared to satisfy O{sub 2} limitations i the contaminated soil profile. Despite no apparent O{sub 2} limitations in the contaminated soil profile. Despite no apparent O{sub 2} limitation for fuel biodegradation, low oxygen utilization rates were observed while performing in situ respiration tests following system shutdown. Preliminary in situ respirometry, soil gas, laboratory microcosm, stable carbon isotope, and soil characterization data indicate that both a low fuel surface area to volume ratio and bacterial cell damage may be involved in the observed low LNAPL bioemulsification and biodegradation rates.
- OSTI ID:
- 490951
- Report Number(s):
- CONF-950483--; ISBN 1-57477-007-1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Bioslurping: Combined vacuum-enhanced free fuel removal and bioventing
Results of a multi-site field treatability test for bioslurping: A comparison of LNAPL rates using vacuum-enhanced recovery (bioslurping), passive skimming, and pump drawdown recovery techniques. Field test report