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. 2015 Oct 14;5:15138. doi: 10.1038/srep15138

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(A) Model simulation of the steady-state N₂O accumulation and PHB production of a SBR performing denitrification as a function of the length of filling time. The simulation conditions are: Reactor volume = 8 L, cycle time = 6 h, SRT = 15 d, filling time = 12–180 min, decanting time = 3 min, influent loading = 16 L/d, influent Ss = 300 mg-COD/L, influent nitrate = 50 mg-N/L. In addition, extra simulation was carried out in a continuous denitrifying system with the same SRT and influent loading conditions; and (B) the linear relationship between the fraction of N₂O accumulation and maximum PHB production based on the simulation results.