Hydrazine addition enhances the nitrogen removal capacity in an anaerobic ammonium oxidation system through accelerating ammonium and nitrite degradation and reducing nitrate production

Ma, Jing; Yao, Hong; Hai-qin, YU; Zuo, Lushen; Li, Huayu; Ma, Jingui; Xu, Yaru; Jin, Peng; Li, Xinyang

doi:10.1016/j.cej.2017.10.132

Cited by 40 publications

(14 citation statements)

References 41 publications

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“…According to the previous reports, hydrazine inhibition threshold for anammox activity was estimated on 32 mgN 2 H 4 dm −3 [16]. In the experiment, hydrazine dosage to R1 resulted in more than eight times lower concentration than mentioned the toxicity level (3.7 mgN 2 H 4 dm −3 ).…”

Section: Discussionmentioning

confidence: 90%

“…Positive effect on anammox process performance was observed in a completely autotrophic N-removal over nitrite (CANON) SBR, while hydrazine was added, with optimal concentration at 3.99 mgN 2 H 4 dm −3 . Higher doses gradually reduced the nitrogen removal rate, probably due to the inhibitory effect [18] Other report revealed that addition of 1 mM of hydrazine resulted in heterotrophic denitrification inhibition, increased anammox growth, higher rate of nitrite depletion, and lower nitrate accumulation [16].…”

Section: Start-up Strategiesmentioning

confidence: 98%

“…Hydrazine is also known for its high toxicity for living organisms; nevertheless, some bacteria can use it as an energy source. Anammox micro-organisms can tolerate and convert up to 1 mM of hydrazine [16]. The presence of N 2 H 4 increases the rate of ammonia oxidation and nitrite reduction and affects activity of nitriteoxidizing bacteria simultaneously enhancing growth of the anammox biomass [16,17].…”

Section: Start-up Strategiesmentioning

confidence: 99%

“…Anammox micro-organisms can tolerate and convert up to 1 mM of hydrazine [16]. The presence of N 2 H 4 increases the rate of ammonia oxidation and nitrite reduction and affects activity of nitriteoxidizing bacteria simultaneously enhancing growth of the anammox biomass [16,17]. Positive effect on anammox process performance was observed in a completely autotrophic N-removal over nitrite (CANON) SBR, while hydrazine was added, with optimal concentration at 3.99 mgN 2 H 4 dm −3 .…”

Section: Start-up Strategiesmentioning

confidence: 99%

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Fast start-up of anammox process with hydrazine addition

et al. 2019

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The anammox process is an economically favourable nitrogen removal process; however, low growth rates of anammox biomass block its more widespread application. As different approaches on techniques for anammox bacteria growth acceleration were tested, this study focused on long-term evaluation of hydrazine addition in the start-up phase. Effect of hydrazine addition (dose 3.7 mgN 2 H 4 dm −3 ) was investigated in a pilot-scale SBR treating ammonia-rich reject water from sludge dewatering after partial nitritation process, and effects were compared to a reference reactor. Hydrazine addition resulted in much higher anammox biomass enrichment observed as higher nitrogen removal rate [0.512 kgN (m 3 d) −1 with hydrazine versus 0.256 kgN (m 3 d) −1 without reagent]. Sludge from chemically stimulated reactor revealed also higher (by 22.6%) specific anammox activity rate than the reference. After the hydrazine addition was stopped, observed process rates remained stable and no regression in the nitrogen removal efficiency could be noticed. In the final phase, nitrogen removal rate was only 48.7% of process rate in the reactor previously stimulated by hydrazine. Results of the experiment confirmed positive effect of hydrazine presence on anammox bacteria enrichment process.

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Section: Discussionmentioning

confidence: 90%

Section: Start-up Strategiesmentioning

confidence: 98%

Section: Start-up Strategiesmentioning

confidence: 99%

Section: Start-up Strategiesmentioning

confidence: 99%

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Fast start-up of anammox process with hydrazine addition

et al. 2019

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“…Some methods for nitrite degradation have been developed, including oxidation, reduction, physical adsorption, bacteria decomposition, use of water fertiliser and microbial degradation. (i) Oxidative degradation of nitrite: It has the advantages of high reaction speed, low cost, high abundance and environmental friendliness (Ma et al ., 2018). However, the method has less practical application and low oxidation efficiency in environment (Vega et al ., 2018).…”

Section: Introductionmentioning

confidence: 99%

Detection of nitrite degradation by Lactobacillus plantarum DMDL9010 through the anaerobic respiration electron transport chain using proteomic analysis

Yao

Liu

Liang

et al. 2020

Int J of Food Sci Tech

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This study aimed to investigate the mechanism of nitrite degradation by Lactobacillus plantarum DMDL9010 using the proteomic technology. The results showed that 0.276 g L−1 nitrite was degraded completely by L. plantarum DMDL9010 in 24 h. Nitrite was transported into the pericytoplasm by a two‐component system. Reduced nicotinamide adenine dinucleotide (NADH) and flavin adenine dinucleotide‐2 (FADH2) were produced during metabolism via these pathways of phosphotransferase system, glycolysis/gluconeogenesis and citrate cycle. NADH and FADH2 produced electrons catalysed by dehydrogenase. The electrons were transferred through the electron transport chain eventually to nitrite. Some molecules of nitrites gained electrons and were reduced to NH3 by nitrite reductase. Then NH3 from nitrite was converted into l‐glutamine catalysed by glutamine synthetase, which was one of the ways to generate l‐glutamine. This study can provide theoretical guidance to the research on the biological technique to reduce nitrite in food products.

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Recent Advancements in Electrochemical Hydrogen Production via Hybrid Water Splitting

Qian,

Zhu,

Ahmad

et al. 2023

Advanced Materials

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As one of the most promising approaches to producing high purity hydrogen (H2), electrochemical water splitting powered by the renewable energy sources such as solar, wind, and hydroelectric power has attracted considerable interest over the past decade. However, the water electrolysis process is seriously hampered by the sluggish electrode reaction kinetics, especially the four‐electron oxygen evolution reaction (OER) at the anode side, which induces a high reaction overpotential. At present, the emerging hybrid electrochemical water splitting strategy has been proposed by integrating thermodynamically favorable electro‐oxidation reactions with hydrogen evolution reaction (HER) at the cathode, providing a new opportunity for energy‐efficient H2 production. To achieve highly efficient and cost‐effective hybrid water splitting (HWS) towards large‐scale practical H2 production, much work has been continuously done to exploit the alternative anodic oxidation reactions and cutting‐edge electrocatalysts. This review will focus on recent developments on electrochemical H2 production coupled with alternative oxidation reactions, including the choice of anodic substrates, the investigation on electrocatalytic materials, and the deep understanding of the underlying reaction mechanisms. Finally, some insights into the scientific challenges now standing in the way of future advancement of the hybrid water electrolysis technique are shared, in the hope of inspiring further innovative efforts in this rapidly growing field.This article is protected by copyright. All rights reserved

show abstract

Hydrazine addition enhances the nitrogen removal capacity in an anaerobic ammonium oxidation system through accelerating ammonium and nitrite degradation and reducing nitrate production

Cited by 40 publications

References 41 publications

Fast start-up of anammox process with hydrazine addition

Fast start-up of anammox process with hydrazine addition

Detection of nitrite degradation by Lactobacillus plantarum DMDL9010 through the anaerobic respiration electron transport chain using proteomic analysis

Recent Advancements in Electrochemical Hydrogen Production via Hybrid Water Splitting

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