Operation and model description of a sequencing batch reactor treating reject water for biological nitrogen removal via nitrite

Dosta, J.; Galí, A.; El-Hadj, T. Benabdallah; Macé, S.; Mata‐Alvarez, J.

doi:10.1016/j.biortech.2006.04.033

Cited by 69 publications

(51 citation statements)

References 17 publications

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“…Such waste stream of reject water is normally recycled back to the main wastewater process for treatment due to the low quality. This will accordingly contribute from 10-80% of P load, 20-30% of N load and 3-5% of COD load to the BNR process (Pitman, 1999;Loosdrecht and Salem, 2006;Dosta et al, 2007). As a result, P and N removal efficiency can be considerably affected.…”

Section: Introductionmentioning

confidence: 99%

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A promising approach of reject water treatment using a tidal flow constructed wetland system employing alum sludge as main substrate

Yang

Zhao

Wang³

et al. 2011

Water Science and Technology

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This study examined a novel reuse of alum sludge, an inescapable by-product of drinking water treatment process when aluminium salt is added as a coagulant, as the main medium in a laboratory-scale multi-stage constructed wetland (CW) system for reject water treatment. Such reject water is a main concern in municipal wastewater treatment plant (MWWTP) for increasing the organic and nutrient loading. A ‘tidal flow’ strategy was employed to enhance the wetland aeration to stimulate organic matters (OM) and ammoniacal-nitrogen (N) oxidation while the ‘step feed’ operation was adopted to supply the necessary amount of carbon source for denitrification. The results reveal that alum sludge acting as P adsorbent can secure the P removal. Meanwhile, high removals of N and OM can also be obtained due to the active bacteria growth on the alum sludge surface. The results show that average removal efficiencies of 65.4 ± 12.3% for chemical oxygen demand (COD), 67.8 ± 9.2% for five-day biochemical oxygen demand (BOD5), 33.6 ± 17.0% for N and 99.5 ± 0.49% for P can be achieved over a period of 190 days. This indicates that novel reuse of alum sludge as medium in CW system can provide a promising approach for reject water treatment. Therefore, it will significantly reduce the amount of pollutant feedback through reject water recycling in a MWWTP.

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Section: Introductionmentioning

confidence: 99%

“…These include SHARON process, ANAMMOX process, BABE process (Loosdrecht and Salem, 2006), sequencing batch reactor (SBR) and membrane bioreactor (MBR) (Dosta et al, 2007 ) and biofilter (Hwang et al, 2000). Meanwhile, chemical aids and/or physical-chemical processes have also been used for this purpose.…”

Section: Introductionmentioning

confidence: 99%

A promising approach of reject water treatment using a tidal flow constructed wetland system employing alum sludge as main substrate

Yang

Zhao

Wang³

et al. 2011

Water Science and Technology

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“…The quality and the validity of the simulations depend on the quality of the initial variables. Efforts to identify ASM state variables in SBR systems are rarely reported, most authors preferring to use literature data (COELHO et al, 2000) or online calibration of ASM parameters (ANDREOTTOLA et al, 1997;DOSTA et al, 2007). Different methods of identifying or calibrating ASM1 state variables and parameters can be found in the literature.…”

Section: Introductionmentioning

confidence: 99%

Influent fractionation for the use of ASM1 to optimize urban wastewater treatment: Application to the removal of C and N in a SBR

Casellas¹,

Dagot²,

Pons

et al. 2008

rseau

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A simulation of a SBR using Benchmark procedure was done prior to field operation in order to optimize the cycle and phases lengths. The accurate identification of ASM1 variables is a prerequisite to achieve a good prediction. A fractionation procedure was applied to samples, corresponding to dry and rainy weather conditions, for taking into account the ASM1 state variable characteristics of specific wastewater (mixture of domestic and industrial wastewater), which differ largely from the default ones used in ASM1. The choice of the ASM1 state variables identification methodology is very important as it influences the results. Two methods were carried out: a batch test in closed reactors, and a coagulation/flocculation procedure. An optimal 12‑hour cycle length was determined, in terms of discharged water quality and reactor productivity. The described methodology led to valuable results in terms of carbon and nitrogen removal: respectively more than 90% of COD removal and more than 80% on total nitrogen removal.

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“…A menor demanda de matéria orgânica tem viabilizado a aplicação do processo de nitritação/desnitritação para o tratamento de águas residuárias com baixa relação carbono/nitrogênio (C/N), a exemplo do efluente de digestores anaeróbios, lixiviados de aterros sanitários, efluentes de reatores anaeróbios tratando esgoto doméstico e algumas águas residuárias industriais (MULDER et al, 2001; VAN KEMPEN et al, 2001;HANNER et al, 2003;GEE e KIM, 2004;FUX e SIEGRIST, 2004;JENICEK et al, 2004;MOSQUERA-CORRAL et al, 2005;AKERMAN, 2005;VAN LOOSDRECHT e SALEM, 2006;FUX et al, 2006;DOSTA et al, 2007;GUSTAVSSON et al, 2008;QUEIROZ et al, 2008) sem a necessidade de adição de alguma fonte externa de carbono.…”

Section: Tratamento Biológico De áGuas Residuárias De Coqueriasunclassified

Tratamento de despejo de coqueria via nitritação/desnitritação operando um sistema de lodo ativado em bateladas sequenciais.

Queiroz¹

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Operation and model description of a sequencing batch reactor treating reject water for biological nitrogen removal via nitrite

Cited by 69 publications

References 17 publications

A promising approach of reject water treatment using a tidal flow constructed wetland system employing alum sludge as main substrate

A promising approach of reject water treatment using a tidal flow constructed wetland system employing alum sludge as main substrate

Influent fractionation for the use of ASM1 to optimize urban wastewater treatment: Application to the removal of C and N in a SBR

Tratamento de despejo de coqueria via nitritação/desnitritação operando um sistema de lodo ativado em bateladas sequenciais.

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