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CONCURRENT TREATMENT OF 1,4-DIOXANE AND CHLORINATED ALIPHATICS IN A GROUNDWATER RECIRCULATION SYSTEM VIA AEROBIC COMETABOLISM
Chu, M.-Y. J., P.J. Bennett, M.E. Dolan, M.R. Hyman, A.D. Peacock, A. Bodour, et al.
Groundwater Monitoring & Remediation 38(3):53-64(2018)

In situ aerobic cometabolic biodegradation (ACB) was field-tested for 265 days on groundwater contaminated with 1,4-dioxane (1,4-D), TCE, and 1,2-DCA at Operable Unit D of the former McClellan AFB. The in situ ACB reactor amended recirculated groundwater with propane and oxygen to stimulate the indigenous microbial population. The reactor degraded 1,4-D from 60 µg/L to <3 µg/L while TCE and 1,2-DCA degraded to 1 µg/L and 0.18 µg/L, respectively. The reactor achieved >95% removal for 1,4-D and 1,2-DCA and >90% removal for TCE. High treatment efficiencies for 1,4-D and all co-contaminants were sustained even without propane and oxygen addition for a 2-week period.



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