Modeling of multimode anaerobic/anoxic/aerobic wastewater treatment process at low temperature for process optimization

Zhen Zhou; Xuelian Shen; Lu Man Jiang; Zhichao Wu; Zhiwei Wang; Weichao Ren; Dalong Hu

doi:10.1016/j.cej.2015.07.017

Modeling of multimode anaerobic/anoxic/aerobic wastewater treatment process at low temperature for process optimization

Zhen Zhou, Xuelian Shen, Lu Man Jiang, Zhichao Wu, Zhiwei Wang, Weichao Ren, Dalong Hu

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

This work aims at optimizing performance of the multimode anaerobic/anoxic/aerobic (AAO) system, which could be flexibly operated under AAO, reversed AAO (RAAO) and anoxic/aerobic (AO) modes, based on effluent quality and operating costs at low temperature of 12.5. °C. Influences of sludge retention time (SRT) on effluent quality, functional biomass and operating cost were evaluated for each mode. The AAO has a better performance than RAAO and AO at SRT of 5-25. d under the same operating cost for its higher pollutant removal efficiency and concentration of phosphorus-accumulating organisms. Furthermore, an operating region conforming to required discharge standards was established for the AAO mode by regulating returned activated sludge (RAS) and mixed liquor recirculation (MLR). Optimal condition was obtained using MLR ratio of 100%, RAS ratio of 50%, and SRT of 16. d. Dynamic simulation results showed that multi-criteria modeling was a useful tool in process optimization.

Original language	English
Pages (from-to)	644-650
Number of pages	7
Journal	Chemical Engineering Journal
Volume	281
DOIs	https://doi.org/10.1016/j.cej.2015.07.017
State	Published - 1 Dec 2015
Externally published	Yes

Keywords

Activated sludge
Anaerobic/anoxic/aerobic process
Mathematical model
Optimization
Wastewater treatment

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10.1016/j.cej.2015.07.017

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@article{41d9757b8db042389bb41497ad703024,

title = "Modeling of multimode anaerobic/anoxic/aerobic wastewater treatment process at low temperature for process optimization",

abstract = "This work aims at optimizing performance of the multimode anaerobic/anoxic/aerobic (AAO) system, which could be flexibly operated under AAO, reversed AAO (RAAO) and anoxic/aerobic (AO) modes, based on effluent quality and operating costs at low temperature of 12.5. °C. Influences of sludge retention time (SRT) on effluent quality, functional biomass and operating cost were evaluated for each mode. The AAO has a better performance than RAAO and AO at SRT of 5-25. d under the same operating cost for its higher pollutant removal efficiency and concentration of phosphorus-accumulating organisms. Furthermore, an operating region conforming to required discharge standards was established for the AAO mode by regulating returned activated sludge (RAS) and mixed liquor recirculation (MLR). Optimal condition was obtained using MLR ratio of 100\%, RAS ratio of 50\%, and SRT of 16. d. Dynamic simulation results showed that multi-criteria modeling was a useful tool in process optimization.",

keywords = "Activated sludge, Anaerobic/anoxic/aerobic process, Mathematical model, Optimization, Wastewater treatment",

author = "Zhen Zhou and Xuelian Shen and Jiang, \{Lu Man\} and Zhichao Wu and Zhiwei Wang and Weichao Ren and Dalong Hu",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

year = "2015",

month = dec,

day = "1",

doi = "10.1016/j.cej.2015.07.017",

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T1 - Modeling of multimode anaerobic/anoxic/aerobic wastewater treatment process at low temperature for process optimization

AU - Zhou, Zhen

AU - Shen, Xuelian

AU - Jiang, Lu Man

AU - Wu, Zhichao

AU - Wang, Zhiwei

AU - Ren, Weichao

AU - Hu, Dalong

PY - 2015/12/1

Y1 - 2015/12/1

N2 - This work aims at optimizing performance of the multimode anaerobic/anoxic/aerobic (AAO) system, which could be flexibly operated under AAO, reversed AAO (RAAO) and anoxic/aerobic (AO) modes, based on effluent quality and operating costs at low temperature of 12.5. °C. Influences of sludge retention time (SRT) on effluent quality, functional biomass and operating cost were evaluated for each mode. The AAO has a better performance than RAAO and AO at SRT of 5-25. d under the same operating cost for its higher pollutant removal efficiency and concentration of phosphorus-accumulating organisms. Furthermore, an operating region conforming to required discharge standards was established for the AAO mode by regulating returned activated sludge (RAS) and mixed liquor recirculation (MLR). Optimal condition was obtained using MLR ratio of 100%, RAS ratio of 50%, and SRT of 16. d. Dynamic simulation results showed that multi-criteria modeling was a useful tool in process optimization.

AB - This work aims at optimizing performance of the multimode anaerobic/anoxic/aerobic (AAO) system, which could be flexibly operated under AAO, reversed AAO (RAAO) and anoxic/aerobic (AO) modes, based on effluent quality and operating costs at low temperature of 12.5. °C. Influences of sludge retention time (SRT) on effluent quality, functional biomass and operating cost were evaluated for each mode. The AAO has a better performance than RAAO and AO at SRT of 5-25. d under the same operating cost for its higher pollutant removal efficiency and concentration of phosphorus-accumulating organisms. Furthermore, an operating region conforming to required discharge standards was established for the AAO mode by regulating returned activated sludge (RAS) and mixed liquor recirculation (MLR). Optimal condition was obtained using MLR ratio of 100%, RAS ratio of 50%, and SRT of 16. d. Dynamic simulation results showed that multi-criteria modeling was a useful tool in process optimization.

KW - Activated sludge

KW - Anaerobic/anoxic/aerobic process

KW - Mathematical model

KW - Optimization

KW - Wastewater treatment

UR - https://www.scopus.com/pages/publications/84937124817

U2 - 10.1016/j.cej.2015.07.017

DO - 10.1016/j.cej.2015.07.017

M3 - 文章

AN - SCOPUS:84937124817

SN - 1385-8947

VL - 281

SP - 644

EP - 650

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -

Modeling of multimode anaerobic/anoxic/aerobic wastewater treatment process at low temperature for process optimization

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Keywords

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