Accession Number : ADA600286


Title :   A Low-Cost, Passive Approach for Bacterial Growth and Distribution for Large-Scale Implementation of Bioaugmentation


Descriptive Note : Final rept. Apr 2008-Aug 2010


Corporate Author : NAVAL FACILITIES ENGINEERING COMMAND PORT HUENEME CA ENGINEERING SERVICE CENTER


Personal Author(s) : Trotsky, J ; Wymore, R A ; Lamar, M R ; Sorenson, K S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a600286.pdf


Report Date : Dec 2010


Pagination or Media Count : 585


Abstract : This ESTCP project compared a low-cost, passive approach for bioaugmentation to an active recirculation approach for full-scale TCE source area application. The active cell operated by continuously extracting and reinjecting groundwater, while the passive system used an inject and drift approach. Electron donor was added weekly for the active cell and monthly for the passive cell. After several months of pre-conditioning, bioaugmentation was performed using a commercially available culture. Results showed that dechlorination to VC with significant production of ethene, as well as distribution of DHC, was achieved in the upgradient half of the active treatment cell (more than 35 ft from injection wells), and at monitoring wells near two of the three passive cell injection locations (more than 25 ft from injection wells). Comparison of bacterial growth and transport indicated that DHC was transported almost as quickly as a conservative tracer under both flow regimes, suggesting that retardation of bacteria was not significant. Overall, bacterial growth and dechlorination performance was similar using both approaches, but the active system was more costly.


Descriptors :   *BACTERIA , *BIODEGRADATION , *WASTE TREATMENT , BASE LINES , CONTAMINANTS , COST ANALYSIS , CULTURES(BIOLOGY) , DECONTAMINATION , DISTRIBUTION , GEOCHEMISTRY , GROUND WATER , GROWTH(PHYSIOLOGY) , HYDROGEOLOGY , PERFORMANCE(ENGINEERING) , SAMPLING , SOLVENTS , WATER WELLS


Subject Categories : Biochemistry
      Microbiology
      Water Pollution and Control


Distribution Statement : APPROVED FOR PUBLIC RELEASE