A modified version of the IWA task group Activated Sludge Model n°1 has been applied to predict the performances of a SBR operated in the pre-denitrification mode to remove organic carbon and nitrogen from a municipal wastewater. Several mathematical simulations have been carried out in order to investigate the effect of different influent characteristics (in terms of COD to NH4-N ratio) and operational conditions (in terms of number of cycles per day and ratio between the mixed react anoxic period and the total effective react period) on the reactor volume required to achieve the desired nitrogen removal efficiency. The data collected from these simulations have been elaborated to obtain a mathematical explicit expression, which can be used for the design of SBRs treating municipal wastewaters. The proposed logarithmic expression gives the appropriate reactor size as an explicit function of the COD to NH4-N ratio and the number of cycles per day. This mathematical expression also includes 4 coefficients, which depend on the kinetic parameters of the biological system and, slightly, on the ratio between the mixed react anoxic period and the total effective react period.

A Mathematical Explicit Expression for the Design of Nitrogen Removal in SBRs Treating Domestic Wastewater / L., Petta; Pirozzi, Francesco; G., Esposito; A., Giordano; Esposito, Giovanni. - STAMPA. - (2008), pp. 131-134. (Intervento presentato al convegno SBR4 - 4th Sequencing Batch Reactor Conference tenutosi a Roma nel 7-10 Aprile 2008).

A Mathematical Explicit Expression for the Design of Nitrogen Removal in SBRs Treating Domestic Wastewater

PIROZZI, FRANCESCO;ESPOSITO, GIOVANNI
2008

Abstract

A modified version of the IWA task group Activated Sludge Model n°1 has been applied to predict the performances of a SBR operated in the pre-denitrification mode to remove organic carbon and nitrogen from a municipal wastewater. Several mathematical simulations have been carried out in order to investigate the effect of different influent characteristics (in terms of COD to NH4-N ratio) and operational conditions (in terms of number of cycles per day and ratio between the mixed react anoxic period and the total effective react period) on the reactor volume required to achieve the desired nitrogen removal efficiency. The data collected from these simulations have been elaborated to obtain a mathematical explicit expression, which can be used for the design of SBRs treating municipal wastewaters. The proposed logarithmic expression gives the appropriate reactor size as an explicit function of the COD to NH4-N ratio and the number of cycles per day. This mathematical expression also includes 4 coefficients, which depend on the kinetic parameters of the biological system and, slightly, on the ratio between the mixed react anoxic period and the total effective react period.
2008
A Mathematical Explicit Expression for the Design of Nitrogen Removal in SBRs Treating Domestic Wastewater / L., Petta; Pirozzi, Francesco; G., Esposito; A., Giordano; Esposito, Giovanni. - STAMPA. - (2008), pp. 131-134. (Intervento presentato al convegno SBR4 - 4th Sequencing Batch Reactor Conference tenutosi a Roma nel 7-10 Aprile 2008).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/304608
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