Figure 1. Growth (◊), concentrations of glucose (∆), nitrate (■) and nitrite (●) in batch denitrification tests of Paracoccus pantotrophus P16 grown in a synthetic medium containing 700 mg NO₃^--N/l and 800 mg C/l glucose (batches 1-4) or 1,600 mg C/l glucose (batches 5-6). Standard deviations of growth, glucose concentrations did not exceed 5% while for nitrate and nitrite concentrations did not exceed 10% of their corresponding values.