Numerical model for biological fluidized-bed reactor treatment of perchlorate contaminated groundwater.

摘要: Biological fluidized-bed reactor (BFBR) treatment with 1.3 mm granular activated carbon as support medium is being used for removal of 2.6 mg/L perchlorate from contaminated groundwater in California. The California drinking-water action level 4 μg/L requires 99.9% removal. Sufficient ethanol, the electron donor, added to remove oxygen and nitrate well perchlorate, all three serve acceptors, but biological preference nitrate. A numerical BFBR model based upon basic physical, chemical, processes including reaction stoichiometry, biofilm kinetics, sequential acceptor usage was developed evaluated full-scale results. key fitting parameter bacterial detachment rate, which impacts stoichiometry. For best fit this found vary between 0.062 0.31 d-1, an average 0.22 d-1. indicates that GAC particle size, diameter, co...