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| Prediction model for nitrate removal efficiency of saline water in solid-phase denitrification packed-bed reactors |
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Abstract The PBS (polybutylene succinate) pellets were investigated as the simultaneous solid carbon source and the biofilm carrier for the nitrate removal of the synthetic saline wastewater. Nitrate was removed effectively when the water temperature was (29±1)℃.Based on the theory of response surface methodology (RSM), effects of influent nitrate concentrations and hydraulic retention time were explored with the nitrate removal efficiency as the response value. Influent nitrate concentration, hydraulic retention time and their corresponding relationship had significant impacts on response objective. Base on the value of multiple regressions, the predictive polynomial quadratic equation model was established. Predictions inferred from the model were in good agreement with the experimental data that obtained from actual operation by analysis of variance (ANOVA).
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Received: 15 May 2010
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