Coupling fundamental mechanisms and operational controls in mainstream partial denitrification for partial denitrification anammox applications: A review

Izadi, Parin; Sinha, Pooja; Andalib, Mehran; Samberger, Caroline; Lehman, Geno; Messologitis, Katerina; Jacangelo, Joseph G.

doi:10.1016/j.jclepro.2023.136741

Cited by 23 publications

(4 citation statements)

References 112 publications

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“…As mentioned earlier, the mainstream PNA process is faced with low temperatures and low concentrations of ammonium influent, and the need to suppress NOB activity. The PdNA process (Figure 2C ) combines partial denitrification (reduction of NO 3 − –N to NO 2 − –N by denitrifying bacteria) with anammox (Izadi et al, 2023 ). Schoepflin et al ( 2022 ) showed that PdNA‐MBBR start‐up does not require high concentrations of ammonium and nitrite and can be initiated rapidly without any inoculation of anammox biomass.…”

Section: Ifas With Anammoxmentioning

confidence: 99%

“…This is because nitrite, a key substrate for anammox, is produced by denitrification. So the technology avoids the key limiting factor for PNA and SAND development—inhibition of NOB activity—and can reduce potential N 2 O emissions (Izadi et al, 2023 ). The combination of IFAS with the PdNA process gives the process more flexibility and stability.…”

Section: Ifas With Anammoxmentioning

confidence: 99%

“…This is due to the spatial separation of microbial communities in the IFAS system and the presence of denitrifying activated sludge makes AnAOB resistant to high COD concentrations. Carbon to nitrogen rate is important for eliminating the competition between HDB and AnAOB for NO 2 − –N (Tang et al, 2014 ), and the limitation of the carbon source results in insufficient electron flow to nitrite reductase enzyme (Izadi et al, 2023 ). Setting the appropriate C/N allows HDB to express differences between feast (exogenous denitrification) and famine (endogenous denitrification) periods (Gong et al, 2013 ).…”

Section: Factors Affecting the Denitrification Process Of Ifasmentioning

confidence: 99%

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Research progress of anaerobic ammonium oxidation (Anammox) process based on integrated fixed‐film activated sludge (IFAS)

Li,

Yu,

et al. 2024

Environ Microbiol Rep

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The integrated fixed‐film activated sludge (IFAS) process is considered one of the cutting‐edge solutions to the traditional wastewater treatment challenges, allowing suspended sludge and attached biofilm to grow in the same system. In addition, the coupling of IFAS with anaerobic ammonium oxidation (Anammox) can further improve the efficiency of biological denitrification. This paper summarises the research progress of IFAS coupled with the anammox process, including partial nitrification anammox, simultaneous partial nitrification anammox and denitrification, and partial denitrification anammox technologies, and describes the factors that limit the development of related processes. The effects of dissolved oxygen, influent carbon source, sludge retention time, temperature, microbial community, and nitrite‐oxidising bacteria inhibition methods on the anammox of IFAS are presented. At the same time, this paper gives an outlook on future research focus and engineering practice direction of the process.

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Section: Ifas With Anammoxmentioning

confidence: 99%

Section: Ifas With Anammoxmentioning

confidence: 99%

Section: Factors Affecting the Denitrification Process Of Ifasmentioning

confidence: 99%

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Research progress of anaerobic ammonium oxidation (Anammox) process based on integrated fixed‐film activated sludge (IFAS)

Li,

Yu,

et al. 2024

Environ Microbiol Rep

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“…The PD process is characterized with stable NO 2 − -N accumulation, lower carbon source demand, and fewer greenhouse gas emissions [2,3]. Therefore, the synergy of the PD and anammox processes is of great importance as an energy-efficient and environmentally sustainable alternative approach improving the nitrogen removal performance in mainstream municipal wastewater treatment [4,5].…”

Section: Introductionmentioning

confidence: 99%

Insights into the Responses of the Partial Denitrification Process to Elevated Perfluorooctanoic Acid Stress: Performance, EPS Characteristic and Microbial Community

Zhang,

Feng

et al. 2023

Water

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This study aimed at investigating the potential impacts of perfluorooctanoic acid (PFOA) exposure on the partial denitrification (PD) system. Our results indicated that nitrite accumulation rates were significantly decreased to 67.94 ± 1.25%–69.52 ± 3.13% after long-term PFOA exposure (0.5–20 mg/L), while the nitrate transformation ratio was slightly impacted. The PFOA removal efficiency gradually decreased from 67.42 ± 3.39% to 6.56 ± 5.25% with an increasing PFOA dosage, indicating that the main PFOA removal pathway was biosorption. The average EPS contents increased by two folds, which suggested that exposure to PFOA significantly stimulated EPS secretion. Excitation emission matrix analysis revealed that PFOA exposure promoted the secretion of tryptophan protein-like, humic acid-like, and aromatic protein II-like substances, which may act as a protective barrier against PFOA toxicity. Moreover, significant changes in characteristic peaks after PFOA exposure were shown as indicated by Fourier transform infrared spectroscopy. High-throughput sequencing suggested that PFOA significantly decreased bacterial richness and increased evenness, indicating that toxicity effects of PFOA were more pronounced for abundant species (e.g., Thauera) than rare species. Thauera was the most dominant genus responsible for nitrite accumulation, whose abundance significantly decreased from 35.99 ± 2.67% to 18.60 ± 2.18% after PFOA exposure. In comparison, the abundances of common denitrifiers, such as Denitratisoma, Bdellovibrio, and OLB8, significantly increased, suggesting that these genera were potential PFOA-resistant bacteria. This study presents new insights into the effect of PFOA on a PD system.

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Rapid establishment of municipal sewage partial denitrification-anammox for nitrogen removal through inoculation with side-stream anammox biofilm without domestication

Yang,

Peng,

Hou

et al. 2024

Bioresource Technology

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Coupling fundamental mechanisms and operational controls in mainstream partial denitrification for partial denitrification anammox applications: A review

Cited by 23 publications

References 112 publications

Research progress of anaerobic ammonium oxidation (Anammox) process based on integrated fixed‐film activated sludge (IFAS)

Research progress of anaerobic ammonium oxidation (Anammox) process based on integrated fixed‐film activated sludge (IFAS)

Insights into the Responses of the Partial Denitrification Process to Elevated Perfluorooctanoic Acid Stress: Performance, EPS Characteristic and Microbial Community

Rapid establishment of municipal sewage partial denitrification-anammox for nitrogen removal through inoculation with side-stream anammox biofilm without domestication

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