Fast start-up of partial nitritation as pre-treatment for anammox in membrane bioreactor

Huang, Xiaowu; Urata, Kohei; Wei, Qiaoyan; Yamashita, Yūki; Hama, Takehide; Kawagoshi, Yasunori

doi:10.1016/j.bej.2015.10.018

Cited by 37 publications

(10 citation statements)

References 44 publications

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“…The former partially oxidizes ammonium (NH 4 + ) to nitrite (NO 2 − ) with oxygen gas (O 2 ) as the electron acceptor, and the latter subsequently oxidizes NH 4 + to gaseous nitrogen (N 2 ) with NO 2 − as the electron acceptor (Nielsen et al, 2005). However, the CANON process is difficult to initiate and has a long start-up time, which is attributed to (1) the low growth rate of AnAOB (doubling time of 10-12 day) (Kartal et al, 2010) and (2) the differences between the growth rates and parameter demands of AOB and AnAOB (Huang et al, 2016). Several key factors, such as pH, dissolved oxygen (DO) and temperature, have been defined and optimized to rapidly enrich both AOB and AnAOB in a single reactor (Liu et al, 2016;Wang et al, 2017a,b,c), and numerous reaction systems, such as continuous stirred tank reactors, sequencing batch biofilter granular reactors, membrane bio-reactors, and sludge granular systems have already been reported and utilized (Liu et al, 2017;Wang et al, 2017a,b,c;Sun et al, 2017;Zhang et al, 2017;Morales et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Fast start-up of the CANON process with a SABF and the effects of pH and temperature on nitrogen removal and microbial activity

Yue

Liu

et al. 2018

Bioresource Technology

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Section: Introductionmentioning

confidence: 99%

Fast start-up of the CANON process with a SABF and the effects of pH and temperature on nitrogen removal and microbial activity

Yue

Liu

et al. 2018

Bioresource Technology

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“…Environmental engineers have been making efforts to reduce the start-up time of SNaD microorganisms in order to reduce biomass washout and maintain the TN removal efficiency [44]. Different reactors with low retention times have been designed and studied, including the fluidized bed reactor, the membrane reactor, the gas lift reactor, the rotating biological reactor, and the up-flow anaerobic sludge blanket; however, a portion of biomass is still washed out with the effluent in all these systems, particularly for unstable periods, due to the cases overloading to increase wastewater treatment through-put rates, which induces biomass sloughing and flotation and which results in wash-out [51].…”

Section: Prevention Of Biomass Washout During the Start-up Of Snadmentioning

confidence: 99%

Sustainable Approach to Eradicate the Inhibitory Effect of Free-Cyanide on Simultaneous Nitrification and Aerobic Denitrification during Wastewater Treatment

et al. 2019

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Simultaneous nitrification and aerobic denitrification (SNaD) is a preferred method for single stage total nitrogen (TN) removal, which was recently proposed to improve wastewater treatment plant design. However, SNaD processes are prone to inhibition by toxicant loading with free cyanide (FCN) possessing the highest inhibitory effect on such processes, rendering these processes ineffective. Despite the best efforts of regulators to limit toxicant disposal into municipal wastewater sewage systems (MWSSs), FCN still enters MWSSs through various pathways; hence, it has been suggested that FCN resistant or tolerant microorganisms be utilized for processes such as SNaD. To mitigate toxicant loading, organisms in SNaD have been observed to adopt a diauxic growth strategy to sequentially degrade FCN during primary growth and subsequently degrade TN during the secondary growth phase. However, FCN degrading microorganisms are not widely used for SNaD in MWSSs due to inadequate application of suitable microorganisms (Chromobacterium violaceum, Pseudomonas aeruginosa, Thiobacillus denitrificans, Rhodospirillum palustris, Klebsiella pneumoniae, and Alcaligenes faecalis) commonly used in single-stage SNaD. This review expatiates the biological remedial strategy to limit the inhibition of SNaD by FCN through the use of FCN degrading or resistant microorganisms. The use of FCN degrading or resistant microorganisms for SNaD is a cost-effective method compared to the use of other methods of FCN removal prior to TN removal, as they involve multi-stage systems (as currently observed in MWSSs). The use of FCN degrading microorganisms, particularly when used as a consortium, presents a promising and sustainable resolution to mitigate inhibitory effects of FCN in SNaD.

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“…As the real substrate used by AOB was NH 3 instead of NH 4 + , the change of pH would affect the process of nitrification and the composition of nitrifying bacteria. The calculation formula of FA is as follows [25]: (5) When the FA concentration was appropriate, it could be used as the ammonia oxidation matrix of AOB, but when the FA concentration reached a certain threshold value, the activity of AOB and NOB would be inhibited to different degrees. Rongsayamanont et al [26] determined that the initial concentration range of inhibition of FA on AOB and NOB was 60~120 and 0.6~60 mg/L, respectively.…”

Section: Effect Of Influent Ph On Nitrogen Transformationmentioning

confidence: 99%

“…Recently, partial nitritation (PN) and the anaerobic ammonium oxidation (ANAMMOX) process has been considered to be the most efficient and economical biological nitrogen removal method [5]. Compared with conventional nitrification and denitrification, the PN-ANAMMOX process can reduce oxygen consumption by 62.5% without additional carbon sources.…”

Section: Introductionmentioning

confidence: 99%

Regulation of Partial Nitritation in Constructed Rapid Infiltration System and Analysis of Microbial Community Structure

Chen¹,

Lü²,

Ouyang³

et al. 2019

Pol. J. Environ. Stud.

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Partial nitritation (PN) and the anaerobic ammonium oxidation (ANAMMOX) process provides a novel method to solve the problem of low TN removal efficiency in a constructed rapid infiltration (CRI) system, and PN is the prerequisite to realize the process. In this study, the feasibility of achieving PN in a CRI system by synergistic regulation of free chlorine, filter height and influent pH was investigated. The characteristics of microbial community structure during the stable operation of the PN process were also discussed. The results showed that after adding 3 mg/L of free chlorine continuously for 23 days, adjusting the effluent filter height to 75 cm and the influent pH to 8.2~8.5, the PN process successfully started with the NO 2-N accumulation rate staying stable at about 90% and effluent NO 2-N/NH 4 +-N ratio between 1.23 and 1.35, thus providing suitable influent conditions for the subsequent ANAMMOX. Based on 16S rRNA high-throughput sequencing, a total of 41 phyla, 144 classes and 310 genera were detected from the stable running PN-CRI system. The detected ammonia-oxidizing microorganisms mainly included Nitrosomonas, Nitrosovibrio and Candidatus Nitrososphaera; while only Nitrospira was detected in nitrite-oxidizing bacteria genera with its relative abundance at only 6.7~10.0% of the total abundance of ammonia-oxidizing microorganisms. This indicated that the synergistic regulation strategy could selectively eliminate nitrite-oxidizing bacteria, thus creating favorable conditions for the occurrence of PN. These findings could provide a theoretical basis and scientific reference for efficient and economical nitrogen removal in a CRI system.

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Fast start-up of partial nitritation as pre-treatment for anammox in membrane bioreactor

Cited by 37 publications

References 44 publications

Fast start-up of the CANON process with a SABF and the effects of pH and temperature on nitrogen removal and microbial activity

Fast start-up of the CANON process with a SABF and the effects of pH and temperature on nitrogen removal and microbial activity

Sustainable Approach to Eradicate the Inhibitory Effect of Free-Cyanide on Simultaneous Nitrification and Aerobic Denitrification during Wastewater Treatment

Regulation of Partial Nitritation in Constructed Rapid Infiltration System and Analysis of Microbial Community Structure

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