The integration of methanogenesis with shortcut nitrification and denitrification in a combined UASB with MBR

Yingyu An; Fenglin Yang; Hwee Chuan Chua; Fook Sin Wong; Bing Wu

doi:10.1016/j.biortech.2007.07.020

The integration of methanogenesis with shortcut nitrification and denitrification in a combined UASB with MBR

Yingyu An, Fenglin Yang, Hwee Chuan Chua, Fook Sin Wong, Bing Wu

Faculty of Civil and Environmental Engineering

University of Iceland

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

Abstract

A combined system consisting of an up-flow anaerobic sludge blanket (UASB) and an aerobic membrane bioreactor (MBR) was operated at 28-30 °C and pH 7.8-8.1 for the treatment of low-strength synthetic wastewater enriched with organic carbon and NH₄Cl. The MBR slurry was recirculated into the UASB with a ratio of 50-800%. It was found that nitrite was able to accumulate steadily during the nitrification step in the MBR at a low TOC / NH₄⁺-N ratio. The mixed liquid containing NO_X^--N in the MBR was recirculated to the UASB, and denitrification rather than methanogenesis became the preferred pathway. Whereas, the less carbon requirement for denitrification via nitrite rather than nitrate allowed methanogenesis to proceed simultaneously in the same reactor. The combination of membrane filtration and partial nitrification in the MBR with simultaneous denitrification and methanogenesis in the UASB could stably reach 98% TOC removal and 48.1-82.8% TN removal with recirculation ratio increasing from 50% to 800%.

Original language	English
Pages (from-to)	3714-3720
Number of pages	7
Journal	Bioresource Technology
Volume	99
Issue number	9
DOIs	https://doi.org/10.1016/j.biortech.2007.07.020
Publication status	Published - Jun 2008

Bibliographical note

Funding Information: The authors would like to express heartfelt acknowledgement to the Public Utilities Board of Singapore for providing financial support for this research (Project No. R 05-044-3). The Ulu Pandan Wastewater Treatment and Reclamation plant is equally thankful for their assistance of providing the sludge.

Other keywords

MBR
Methanogenesis
Nitrite accumulation
Shortcut nitrification and denitrification
UASB

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10.1016/j.biortech.2007.07.020

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@article{0c68467d58734878b00b051a52e96012,

title = "The integration of methanogenesis with shortcut nitrification and denitrification in a combined UASB with MBR",

abstract = "A combined system consisting of an up-flow anaerobic sludge blanket (UASB) and an aerobic membrane bioreactor (MBR) was operated at 28-30 °C and pH 7.8-8.1 for the treatment of low-strength synthetic wastewater enriched with organic carbon and NH4Cl. The MBR slurry was recirculated into the UASB with a ratio of 50-800\%. It was found that nitrite was able to accumulate steadily during the nitrification step in the MBR at a low TOC / NH4+-N ratio. The mixed liquid containing NOX--N in the MBR was recirculated to the UASB, and denitrification rather than methanogenesis became the preferred pathway. Whereas, the less carbon requirement for denitrification via nitrite rather than nitrate allowed methanogenesis to proceed simultaneously in the same reactor. The combination of membrane filtration and partial nitrification in the MBR with simultaneous denitrification and methanogenesis in the UASB could stably reach 98\% TOC removal and 48.1-82.8\% TN removal with recirculation ratio increasing from 50\% to 800\%.",

keywords = "MBR, Methanogenesis, Nitrite accumulation, Shortcut nitrification and denitrification, UASB",

author = "Yingyu An and Fenglin Yang and Chua, \{Hwee Chuan\} and Wong, \{Fook Sin\} and Bing Wu",

note = "Funding Information: The authors would like to express heartfelt acknowledgement to the Public Utilities Board of Singapore for providing financial support for this research (Project No. R 05-044-3). The Ulu Pandan Wastewater Treatment and Reclamation plant is equally thankful for their assistance of providing the sludge.",

year = "2008",

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doi = "10.1016/j.biortech.2007.07.020",

language = "English",

volume = "99",

pages = "3714--3720",

journal = "Bioresource Technology",

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AU - An, Yingyu

AU - Yang, Fenglin

AU - Chua, Hwee Chuan

AU - Wong, Fook Sin

AU - Wu, Bing

N1 - Funding Information: The authors would like to express heartfelt acknowledgement to the Public Utilities Board of Singapore for providing financial support for this research (Project No. R 05-044-3). The Ulu Pandan Wastewater Treatment and Reclamation plant is equally thankful for their assistance of providing the sludge.

PY - 2008/6

Y1 - 2008/6

N2 - A combined system consisting of an up-flow anaerobic sludge blanket (UASB) and an aerobic membrane bioreactor (MBR) was operated at 28-30 °C and pH 7.8-8.1 for the treatment of low-strength synthetic wastewater enriched with organic carbon and NH4Cl. The MBR slurry was recirculated into the UASB with a ratio of 50-800%. It was found that nitrite was able to accumulate steadily during the nitrification step in the MBR at a low TOC / NH4+-N ratio. The mixed liquid containing NOX--N in the MBR was recirculated to the UASB, and denitrification rather than methanogenesis became the preferred pathway. Whereas, the less carbon requirement for denitrification via nitrite rather than nitrate allowed methanogenesis to proceed simultaneously in the same reactor. The combination of membrane filtration and partial nitrification in the MBR with simultaneous denitrification and methanogenesis in the UASB could stably reach 98% TOC removal and 48.1-82.8% TN removal with recirculation ratio increasing from 50% to 800%.

AB - A combined system consisting of an up-flow anaerobic sludge blanket (UASB) and an aerobic membrane bioreactor (MBR) was operated at 28-30 °C and pH 7.8-8.1 for the treatment of low-strength synthetic wastewater enriched with organic carbon and NH4Cl. The MBR slurry was recirculated into the UASB with a ratio of 50-800%. It was found that nitrite was able to accumulate steadily during the nitrification step in the MBR at a low TOC / NH4+-N ratio. The mixed liquid containing NOX--N in the MBR was recirculated to the UASB, and denitrification rather than methanogenesis became the preferred pathway. Whereas, the less carbon requirement for denitrification via nitrite rather than nitrate allowed methanogenesis to proceed simultaneously in the same reactor. The combination of membrane filtration and partial nitrification in the MBR with simultaneous denitrification and methanogenesis in the UASB could stably reach 98% TOC removal and 48.1-82.8% TN removal with recirculation ratio increasing from 50% to 800%.

KW - MBR

KW - Methanogenesis

KW - Nitrite accumulation

KW - Shortcut nitrification and denitrification

KW - UASB

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U2 - 10.1016/j.biortech.2007.07.020

DO - 10.1016/j.biortech.2007.07.020

M3 - Article

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SN - 0960-8524

VL - 99

SP - 3714

EP - 3720

JO - Bioresource Technology

JF - Bioresource Technology

IS - 9

ER -

The integration of methanogenesis with shortcut nitrification and denitrification in a combined UASB with MBR

Abstract

Bibliographical note

Other keywords

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