Sludge bulking in a high-rate denitrifying automatic circulation (DAC) reactor

Li, Wei; Zheng, Ping; Wu, Yanan; Zhan, En-chao; Zhang, Zonghe; Wang, Ru; Xing, Yajuan; Abbas, Ghulam; Zeb, Bibi Saima

doi:10.1016/j.cej.2013.11.071

Cited by 28 publications

(1 citation statement)

References 26 publications

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“…S1) confirmed that filamentous bacteria were less common during this phase. The poor sludge settleability during Phase M2 might have been attributed to viscous bulking caused by insufficient C sources for denitrification (Auterska and Novak, 2006) or excessive production of extracellular polymers (Li et al ., 2014b).…”

Section: Resultsmentioning

confidence: 99%

Impact of dissolved oxygen and loading rate on NH₃ oxidation and N₂ production mechanisms in activated sludge treatment of sewage

Zhang

Zheng

et al. 2020

Microbial Biotechnology

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Summary Microaerobic activated sludge (MAS) is a one‐stage process operated at 0.5–1.0 mg l−1 dissolved oxygen (DO) aiming at simultaneous nitrification and denitrification. We used molecular techniques and a comprehensive nitrogen (N)‐transformation activity test to investigate the dominant NH3‐oxidizing and N2‐producing mechanism as well as the dominant ammonia‐oxidizing bacteria (AOB) species in sludge samples individually collected from an MAS system and a conventional anoxic/oxic (A/O) system; both systems were operated at a normal loading rate (i.e. 1.0 kg chemical oxygen demand (COD) m−3 day−1 and 0.1 kg NH4+‐N m−3 day−1) in our previous studies. The DO levels in both systems (aerobic: conventional A/O system; microaerobic: MAS system) did not affect the dominant NH3‐oxidizing mechanism or the dominant AOB species. This study further demonstrated the feasibility of a higher loading rate (i.e. 2.30 kg COD m−3 day−1 and 0.34 kg NH4+‐N m−3 day−1) with the MAS process during sewage treatment, which achieved a 40% reduction in aeration energy consumption than that obtained in the conventional A/O system. The increase in loading rates in the MAS system did not affect the dominant NH3‐oxidizing mechanism but did impact the dominant AOB species. Besides, N2 was predominantly produced by microaerobic denitrification in the MAS system at the two loading rates.

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Section: Resultsmentioning

confidence: 99%

Impact of dissolved oxygen and loading rate on NH₃ oxidation and N₂ production mechanisms in activated sludge treatment of sewage

Zhang

Zheng

et al. 2020

Microbial Biotechnology

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Effects of different carbon sources on 2,4,6-trichlorophenol degradation in the activated sludge process

Wang

Sun

2020

Bioprocess Biosyst Eng

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A review of partial nitrification in biological nitrogen removal processes: from development to application

Wang

Liu

et al. 2021

Biodegradation

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Sludge bulking in a high-rate denitrifying automatic circulation (DAC) reactor

Cited by 28 publications

References 26 publications

Impact of dissolved oxygen and loading rate on NH₃ oxidation and N₂ production mechanisms in activated sludge treatment of sewage

Impact of dissolved oxygen and loading rate on NH₃ oxidation and N₂ production mechanisms in activated sludge treatment of sewage

Effects of different carbon sources on 2,4,6-trichlorophenol degradation in the activated sludge process

A review of partial nitrification in biological nitrogen removal processes: from development to application

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Sludge bulking in a high-rate denitrifying automatic circulation (DAC) reactor

Cited by 28 publications

References 26 publications

Impact of dissolved oxygen and loading rate on NH3 oxidation and N2 production mechanisms in activated sludge treatment of sewage

Impact of dissolved oxygen and loading rate on NH3 oxidation and N2 production mechanisms in activated sludge treatment of sewage

Effects of different carbon sources on 2,4,6-trichlorophenol degradation in the activated sludge process

A review of partial nitrification in biological nitrogen removal processes: from development to application

Contact Info

Product

Resources

About

Impact of dissolved oxygen and loading rate on NH₃ oxidation and N₂ production mechanisms in activated sludge treatment of sewage

Impact of dissolved oxygen and loading rate on NH₃ oxidation and N₂ production mechanisms in activated sludge treatment of sewage