Mechanisms and microbial structure of partial denitrification with high nitrite accumulation

Du, Rui; Peng, Yongzhen; Cao, Shenbin; Li, Baikun; Niu, Meng

doi:10.1007/s00253-015-7052-9

Cited by 201 publications

(75 citation statements)

References 34 publications

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“…The latter might have been related to the seed sludge for denitrifiers used during both experiments. The high PdN results using acetate and glycerol were consistent with other studies where nitrite accumulation as indicator of PdN has been reported (Baideme et al., ; Bill et al., ; Du et al., ; Ge et al., ; Gong et al., ; Park, Brotto, van Loosdrecht, & Chandran, ; Sharp, Niemiec, Khunjar, Galst, & Deur, ; Uprety, ; van Rijn et al., ; Yang, Wang, & Zhou, ).During the batch experiments, sludge under low carbon loading (from wastewater) was used without acclimation to any of the carbon sources tested while for the long‐term testing methanol acclimated sludge was used. Previous work by Cao et al.…”

Section: Discussionsupporting

confidence: 90%

Impact of carbon source and COD/N on the concurrent operation of partial denitrification and anammox

Peng

et al. 2019

Water Environment Research

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In this study, concurrent operation of anammox and partial denitrification within a nonacclimated mixed culture system was proposed. The impact of carbon sources (acetate, glycerol, methanol, and ethanol) and COD/NO3 − -N ratio on partial denitrification selection under both short-and long-term operations were investigated. Results from short-term testing showed that all carbon sources supported partial denitrification. However, acetate and glycerol were preferred due to their display of efficient partial denitrification selection, which may be related to their different electron transport pathways in comparison with methanol. Long-term operation confirmed results of batch tests by showing the contribution of partial denitrification to nitrate removal above 90% after acclimation in both acetate and glycerol reactors. In contrast, methanol showed challenges of maintaining efficient partial denitrification. COD/NO3 − -N ratio mainly controlled the rate of nitrate reduction and not directly partial denitrification selection; thus, it should be used to balance between denitrification rate and anammox rate. © 2018 Water Environment Federation • Practitioner points• The authors aimed to investigate the impact of carbon sources and COD/NO3 − -N ratio on partial denitrification selection. • All the carbon sources supported partial denitrification as long as the nitrite sink was available. • 90% partial denitrification could be achieved with both acetate and glycerol in long-term operations. • COD/NO3 − -N ratio did not directly control partial denitrification but can be used to balance between denitrification rate and anammox rate.

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Section: Discussionsupporting

confidence: 90%

Impact of carbon source and COD/N on the concurrent operation of partial denitrification and anammox

Peng

et al. 2019

Water Environment Research

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“…While the AnAOB process is easily controlled whenever nitrite is available, PdN selection has become a critical step determining success of the PdN‐AnAOB approach (Kumar & Lin, ). Nitrite accumulation as indicator of PdN has been reported in many studies when fast carbon sources such as acetate (Du et al, ; Ge et al, ; Gong et al, ; Le et al, ; Van Rijn, Tal, & Barak, ; Yang, Wang, & Zhou, ) or glycerol (Baideme et al, ; Bill et al, ; Park, Brotto, Loosdrecht, & Chandran, ; Sharp et al, ; Uprety, ) were used for denitrification. Furthermore, other research also showed that COD/N ratio, pH, DO level, and SRT could be important factors impacting PdN performance (Almeida, Júlio, Reis, & Carrondo, ; Beccari, Passino, Ramadori, & Tandoi, ; Glass & Silverstein, ; Obaja, MacÉ, & Mata‐Alvarez, ).…”

Section: Introductionmentioning

confidence: 99%

Nitrate residual as a key parameter to efficiently control partial denitrification coupling with anammox

Peng

et al. 2019

Water Environment Research

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Despite the increased research efforts, full-scale implementation of shortcut nitrogen removal strategies has been challenged by the lack of consistent nitrite-oxidizing bacteria out-selection. This paper proposes an alternative path using partial denitrification (PdN) selection coupled with anaerobic ammonium-oxidizing bacteria (AnAOB). A nitrate residual concentration (>2 mg N/L) was identified as the crucial factor for metabolic PdN selection using acetate as a carbon source, unlike the COD/N ratio which was often suggested. Therefore, a novel and simple acetate dosing control strategy based on maintaining a nitrate concentration was tested in the absence and presence of AnAOB, achieving PdN efficiencies above 80%. The metabolic-based PdN selection allowed for flexibility to move between PdN and full denitrification when required to meet effluent nitrate levels. Due to the independence of this strategy on species selection and management of nitrite competition, this novel approach will guarantee nitrite availability for AnAOB under mainstream conditions unlike shortcut nitrogen removal approaches based on NOB out-selection. Overall, a COD addition of only 2.2 g COD/g TIN removed was needed for the PdN-AnAOB concept showing its potential for significant savings in external carbon source needs to meet low TIN effluent concentrations making this concept a competitive alternative. • Practitioner points• Nitrate residual is the key control parameter for partial denitrification selection. • Metabolic selection allowed for flexibility of moving from partial to full denitrification. • 2.2 g COD/g TIN removed was needed for partial denitrification-anammox process.

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“…The type of carbon source can significantly influence the NO 2 --N accumulation performance. It could be attributed by diverse organics affected the selection and enrichment of NO 2 --N-accumulating bacteria [24], and the discrepency of NO 3 --N and NO 2 --N reduction rates would also emerge [7,25]. Previous literatures have evidenced that simple micromolecule organic materials could easily harvest NO 2 --N accumulating organisms compared with complex carbon source.…”

Section: Carbon Sourcesmentioning

confidence: 99%

New Insight into Partial Denitrification (PD)-based Anammox Process and Potential Engineering Application: A Review

Bahtiar¹,

Zhang²,

Wang³

et al. 2020

JHER

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Mechanisms and microbial structure of partial denitrification with high nitrite accumulation

Cited by 201 publications

References 34 publications

Impact of carbon source and COD/N on the concurrent operation of partial denitrification and anammox

Impact of carbon source and COD/N on the concurrent operation of partial denitrification and anammox

Nitrate residual as a key parameter to efficiently control partial denitrification coupling with anammox

New Insight into Partial Denitrification (PD)-based Anammox Process and Potential Engineering Application: A Review

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