BioMed Research International / 2018 / Article / Tab 2

Research Article

Effect of Free Nitrous Acid on Nitrous Oxide Production and Denitrifying Phosphorus Removal by Polyphosphorus-Accumulating Organisms in Wastewater Treatment

Table 2

Various rates of denitrifying phosphorus removal by PAOs.

FNA concentration (mgHNO2-N/L)Phosphorus uptake rate (mgPO4-P/h·gVSS)Nitrite reduction rate (mgNO2-N/h·gVSS)The highest N2O to TN proportion (%)PHA degradation rate (mmol-C/h·gVSS)PHA consumption to TN proportion (mmol-C/mmol-N·gVSS)
Nitrite exit conditionsAverage rate of anoxic phaseNitrite exit conditionsAverage rate of anoxic phase

pH 6.092.3 × 10−3−2.08−2.081.1618.80−0.091-
pH 6.531.6 × 10−30.530.532.1426.810.067-
pH 7.010.3 × 10−36.125.384.8240.630.2780.916
pH 7.53.10 × 10−39.666.138.1578.420.5890.546
pH 8.00.96 × 10−311.108.108.2561.550.5810.532
pH 8.50.35 × 10−315.828.6211.744.040.6030.444

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