Growth of strains 2FB3, 4FB10, and 3CB2 on 2-fluorobenzoate (2FBz), 4-fluorobenzoate (4FBz), and 3-chlorobenzoate (3CBz), respectively, under denitrifying conditions. Different concentrations of halobenzoate were spiked in denitrifying medium containing 10 mM nitrate.