HR: 0830h
AN: H11G-0950    [PDF]
TI: Simulation Of An Alcohol Flushing Assisted Bioremediation System
AU: * McKay, M C
EM: mcmckay@emba.uvm.edu
AF: Research Center for Groundwater Remediation Design, University of Vermont 33 Colchester Avenue, Burlington, VT 05405 United States
AU: Pinder, G F
EM: pinder@emba.uvm.edu
AF: Research Center for Groundwater Remediation Design, University of Vermont 33 Colchester Avenue, Burlington, VT 05405 United States
AB: Bioremediation of residual DNAPL in the subsurface can be a time-consuming process due to the relatively slow mass transfer of NAPL contaminant species from the NAPL phase into the aqueous phase. It has been shown that alcohol flushing assists in raising the solubility of NAPL, thereby increasing its speed of deliverance into the aqueous phase. However, on its own, alcohol flushing does not alleviate the problem of what to do with the contaminant once it has been solubilized. It has been proposed that linking these two remediation techniques can generate an optimal system with the alcohol improving the transfer of NAPL into the aqueous phase where, in conjunction with injection of oxygen and nutrients, it can then be biodegraded readily by the existing microbes. To test this hypothesis, an existing multiphase flow and transport code was altered to accommodate the equations necessary to represent the proposed system. The species being modeled include two NAPL contaminants, oxygen, nitrogen, microbes and alcohol. Bioremediation was modeled using oxygen and nitrogen limiting Monod reaction kinetics. Constitutive relationships for the effect of the alcohol on solubility and mobility of NAPL were also added.
DE: 1800 HYDROLOGY
DE: 1829 Groundwater hydrology
DE: 1832 Groundwater transport
SC: Hydrology [H]
MN: 2003 Fall Meeting