Advanced analysis of membrane-bioreactor performance with aerobic-anoxic cycling

D. G.V. De Silva; V. Urbain; D. H. Abeysinghe; B. E. Rittmann

doi:10.1016/S0273-1223(98)00551-4

Advanced analysis of membrane-bioreactor performance with aerobic-anoxic cycling

D. G.V. De Silva, V. Urbain, D. H. Abeysinghe, B. E. Rittmann

Research output: Contribution to journal › Conference article › peer-review

50 Scopus citations

Abstract

Mathematical modeling and intensive chemical analysis are used to quantify the relationships among the heterotrophic bacteria, autotrophic bacteria, and key inorganic (NH₄⁺-N and NO₃^--N) and organic (COD) compounds of municipal wastewater treated in a pilot-scale membrane bioreactor (MBR) operated with aerobic-anoxic cycles. Key features of the model for MBR are no biomass in the effluent, partial removal of biomass-associated products by the membrane, and D.O. cycling with 9 mg/L during aeration period and 0.5 mg/L for the anoxic period. The model explains the key trends in the cyclic data: NH₄⁺-N is consumed only during aerobic periods and rises steadily during anoxic period; NO₃^--N is produced only during aerobic periods, but declines in anoxic periods; The soluble COD in treated water mainly consists of BAP and is relatively constant through the cycle. Advantages of introducing an anoxic cycle to the continuous-flow MBR process are reduction of total effluent nitrogen, oxygen consumption, and sludge production as a consequence of denitrification. On the other hand, the anoxic period causes an increase in the average effluent NH₄⁺-N.

Original language	English (US)
Pages (from-to)	505-512
Number of pages	8
Journal	Water Science and Technology
Volume	38
Issue number	4-5 -5 pt 4
DOIs	https://doi.org/10.1016/S0273-1223(98)00551-4
State	Published - Dec 2 1998
Externally published	Yes
Event	Proceedings of the 1998 19th Biennial Conference of the International Association on Water Quality. Part 1 (of 9) - Vancouver, Can Duration: Jun 21 1998 → Jun 26 1998

Keywords

Activated sludge
Denitrification
Membrane bioreactor
Modeling
Nitrification
Soluble microbial products (SMP)

ASJC Scopus subject areas

Environmental Engineering
Water Science and Technology

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10.1016/S0273-1223(98)00551-4

Cite this

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abstract = "Mathematical modeling and intensive chemical analysis are used to quantify the relationships among the heterotrophic bacteria, autotrophic bacteria, and key inorganic (NH4+-N and NO3--N) and organic (COD) compounds of municipal wastewater treated in a pilot-scale membrane bioreactor (MBR) operated with aerobic-anoxic cycles. Key features of the model for MBR are no biomass in the effluent, partial removal of biomass-associated products by the membrane, and D.O. cycling with 9 mg/L during aeration period and 0.5 mg/L for the anoxic period. The model explains the key trends in the cyclic data: NH4+-N is consumed only during aerobic periods and rises steadily during anoxic period; NO3--N is produced only during aerobic periods, but declines in anoxic periods; The soluble COD in treated water mainly consists of BAP and is relatively constant through the cycle. Advantages of introducing an anoxic cycle to the continuous-flow MBR process are reduction of total effluent nitrogen, oxygen consumption, and sludge production as a consequence of denitrification. On the other hand, the anoxic period causes an increase in the average effluent NH4+-N.",

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T1 - Advanced analysis of membrane-bioreactor performance with aerobic-anoxic cycling

AU - De Silva, D. G.V.

AU - Urbain, V.

AU - Abeysinghe, D. H.

AU - Rittmann, B. E.

PY - 1998/12/2

Y1 - 1998/12/2

N2 - Mathematical modeling and intensive chemical analysis are used to quantify the relationships among the heterotrophic bacteria, autotrophic bacteria, and key inorganic (NH4+-N and NO3--N) and organic (COD) compounds of municipal wastewater treated in a pilot-scale membrane bioreactor (MBR) operated with aerobic-anoxic cycles. Key features of the model for MBR are no biomass in the effluent, partial removal of biomass-associated products by the membrane, and D.O. cycling with 9 mg/L during aeration period and 0.5 mg/L for the anoxic period. The model explains the key trends in the cyclic data: NH4+-N is consumed only during aerobic periods and rises steadily during anoxic period; NO3--N is produced only during aerobic periods, but declines in anoxic periods; The soluble COD in treated water mainly consists of BAP and is relatively constant through the cycle. Advantages of introducing an anoxic cycle to the continuous-flow MBR process are reduction of total effluent nitrogen, oxygen consumption, and sludge production as a consequence of denitrification. On the other hand, the anoxic period causes an increase in the average effluent NH4+-N.

AB - Mathematical modeling and intensive chemical analysis are used to quantify the relationships among the heterotrophic bacteria, autotrophic bacteria, and key inorganic (NH4+-N and NO3--N) and organic (COD) compounds of municipal wastewater treated in a pilot-scale membrane bioreactor (MBR) operated with aerobic-anoxic cycles. Key features of the model for MBR are no biomass in the effluent, partial removal of biomass-associated products by the membrane, and D.O. cycling with 9 mg/L during aeration period and 0.5 mg/L for the anoxic period. The model explains the key trends in the cyclic data: NH4+-N is consumed only during aerobic periods and rises steadily during anoxic period; NO3--N is produced only during aerobic periods, but declines in anoxic periods; The soluble COD in treated water mainly consists of BAP and is relatively constant through the cycle. Advantages of introducing an anoxic cycle to the continuous-flow MBR process are reduction of total effluent nitrogen, oxygen consumption, and sludge production as a consequence of denitrification. On the other hand, the anoxic period causes an increase in the average effluent NH4+-N.

KW - Activated sludge

KW - Denitrification

KW - Membrane bioreactor

KW - Modeling

KW - Nitrification

KW - Soluble microbial products (SMP)

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Advanced analysis of membrane-bioreactor performance with aerobic-anoxic cycling

Abstract

Keywords

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