Nitrogen removal from reject water with primary sludge as denitrification carbon source

L. Zhang; S. J. Zhang; J. Zhou; S. Y. Wang; Y. P. Gan; Y. Z. Peng

doi:10.2166/wst.2010.259

Nitrogen removal from reject water with primary sludge as denitrification carbon source

L. Zhang, S. J. Zhang, J. Zhou, S. Y. Wang, Y. P. Gan, Y. Z. Peng

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

15 Scopus citations

Abstract

A novel system was used for nitrogen removal from reject water. This system includes one anoxic/oxic reactor for nitrification and a special reactor for denitrification in which primary sludge was added intermittently as electron donor. In denitrification reactor, sludge fermentation and denitrification reaction took place simultaneously and promoted each other. It was found that effluent recycle could improve nitrogen removal efficiency due to reclaiming of alkalinity. Under steady state conditions, the average solid retention time (SRT) in denitrification reactor was 12-15 d, a total nitrogen loading rate was 0.2 kg N/(m³ day) and TN removal efficiency was more than 90% without extra carbon source addition. Primary sludge was degraded so that volatile suspended solid (VSS) decreased by 50%. Further investigation showed that ORP could be taken as a control parameter for sludge addition.

Original language	English
Pages (from-to)	2965-2972
Number of pages	8
Journal	Water Science and Technology
Volume	61
Issue number	12
DOIs	https://doi.org/10.2166/wst.2010.259
State	Published - 2010
Externally published	Yes

Keywords

Denitrification
Fermentation
Nitrogen removal
Primary sludge
Reject water
VFA

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10.2166/wst.2010.259

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abstract = "A novel system was used for nitrogen removal from reject water. This system includes one anoxic/oxic reactor for nitrification and a special reactor for denitrification in which primary sludge was added intermittently as electron donor. In denitrification reactor, sludge fermentation and denitrification reaction took place simultaneously and promoted each other. It was found that effluent recycle could improve nitrogen removal efficiency due to reclaiming of alkalinity. Under steady state conditions, the average solid retention time (SRT) in denitrification reactor was 12-15 d, a total nitrogen loading rate was 0.2 kg N/(m3 day) and TN removal efficiency was more than 90% without extra carbon source addition. Primary sludge was degraded so that volatile suspended solid (VSS) decreased by 50%. Further investigation showed that ORP could be taken as a control parameter for sludge addition.",

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AU - Zhang, L.

AU - Zhang, S. J.

AU - Zhou, J.

AU - Wang, S. Y.

AU - Gan, Y. P.

AU - Peng, Y. Z.

PY - 2010

Y1 - 2010

N2 - A novel system was used for nitrogen removal from reject water. This system includes one anoxic/oxic reactor for nitrification and a special reactor for denitrification in which primary sludge was added intermittently as electron donor. In denitrification reactor, sludge fermentation and denitrification reaction took place simultaneously and promoted each other. It was found that effluent recycle could improve nitrogen removal efficiency due to reclaiming of alkalinity. Under steady state conditions, the average solid retention time (SRT) in denitrification reactor was 12-15 d, a total nitrogen loading rate was 0.2 kg N/(m3 day) and TN removal efficiency was more than 90% without extra carbon source addition. Primary sludge was degraded so that volatile suspended solid (VSS) decreased by 50%. Further investigation showed that ORP could be taken as a control parameter for sludge addition.

AB - A novel system was used for nitrogen removal from reject water. This system includes one anoxic/oxic reactor for nitrification and a special reactor for denitrification in which primary sludge was added intermittently as electron donor. In denitrification reactor, sludge fermentation and denitrification reaction took place simultaneously and promoted each other. It was found that effluent recycle could improve nitrogen removal efficiency due to reclaiming of alkalinity. Under steady state conditions, the average solid retention time (SRT) in denitrification reactor was 12-15 d, a total nitrogen loading rate was 0.2 kg N/(m3 day) and TN removal efficiency was more than 90% without extra carbon source addition. Primary sludge was degraded so that volatile suspended solid (VSS) decreased by 50%. Further investigation showed that ORP could be taken as a control parameter for sludge addition.

KW - Denitrification

KW - Fermentation

KW - Nitrogen removal

KW - Primary sludge

KW - Reject water

KW - VFA

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JO - Water Science and Technology

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Nitrogen removal from reject water with primary sludge as denitrification carbon source

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Keywords

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