Nitrogen removal in submerged MBR with intermittent aeration

Ćurko, Josip; Matošić, Marin; Jakopović, Helena Korajlija; Mijatović, Ivan

doi:10.5004/dwt.2010.1118

Cited by 16 publications

(3 citation statements)

References 17 publications

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“…According to Moussa et al ., nitrite‐oxidizing bacteria are remarkably more resistant to salinity than ammonia‐oxidizing bacteria 31 . As the MBR system was operated with extreme aeration (without having an anoxic condition), the ammonium‐N in the MBR tank could be mostly converted to nitrate, which is a stabilized form for nitrogen transformation 32,33 …”

Section: Resultsmentioning

confidence: 99%

“…31 As the MBR system was operated with extreme aeration (without having an anoxic condition), the ammonium-N in the MBR tank could be mostly converted to nitrate, which is a stabilized form for nitrogen transformation. 32,33 Figure 5 shows the distribution of the bacterial population at the class and order levels within the predominant phylum with relative abundances higher than 10%. Within Gammaproteobacteria, there were three predominant orders: KF-JG30-C25, Xanthomonadales, and Burkholderiales; Burkholderiales were the most dominant (Fig.…”

Section: Treatment Performance Under Different Salinity Concentrationsmentioning

confidence: 99%

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Impact of saline valorization in contaminated municipal wastewater on the treatment performance and bacterial community dynamics of a membrane bioreactor

Ittisupornrat

Theepharaksapan

krasaesueb

et al. 2022

J of Chemical Tech & Biotech

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Background: Due to salt intrusion and the improper use of seawater for cleaning and flushing in food shops along coastal regions, the aerobic biological wastewater treatment process may have an adverse effect on treatment performance. This study demonstrates membrane bioreactor (MBR) performance for treating saline-contaminated municipal wastewater. The aim of this study is to determine how much salt affects the efficiency of the process and how the functional bacterial community evolves in an MBR for treating actual municipal wastewater.Results: An MBR was applied for actual municipal wastewater treatment by increasing the NaCl concentration from 0 to 20 g L −1 with a hydraulic retention time of 12 h and complete sludge retention. High removal efficiencies of chemical oxygen demand (COD) (ranging from 80.3 to 82.8 mgL −1 ) and ammonium-N (ranging from 40.8 to 44.4 mgL −1 ) were found at salinity concentrations of up to 7.8 ± 0.8 g L −1 . However, the removal efficiency of COD was below 50% at high salinity concentrations of 17.9 ± 1.3 g L −1 , whereas the removal rate of ammonium-N had slightly changed with the value of 90%. In terms of bacterial composition, the largest dominant bacterial communities were Proteobacteria and Planctomycetota, both of which may be the predominant halotolerant/halophilic bacteria group. Additionally, Rhizobiales, Planctomycetales, Pirellulales, and Gemmatales (all of which are members of these phyla) were increased, suggesting that they played an important role in the biodegradation process. Conclusion:The MBR operation showed a good performance for treating municipal wastewater with high salinity concentrations, with a salt tolerance threshold of 7.8 g L −1 . The experimental results indicate that the MBR system can be applied for treating municipal wastewater that is occasionally contaminated with seawater.

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Section: Resultsmentioning

confidence: 99%

Section: Treatment Performance Under Different Salinity Concentrationsmentioning

confidence: 99%

Impact of saline valorization in contaminated municipal wastewater on the treatment performance and bacterial community dynamics of a membrane bioreactor

Ittisupornrat

Theepharaksapan

krasaesueb

et al. 2022

J of Chemical Tech & Biotech

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“…Fouling reduction and 50 % energy saving were also reported by Fan and Zhou who employed a cyclic aeration of 10 s on and 10 s off. In addition, intermittent aeration can significantly increase nutrient removal in MBRs by enriching microorganisms that are responsible for nitrogen and phosphorus reduction . On the other hand, it was found that cyclic aeration induces sludge deflocculation and thereby changes the fouling rates .…”

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confidence: 99%

Current Status and Future Prospects of Membrane Bioreactors (MBRs) and Fouling Phenomena: A Systematic Review

et al. 2018

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Membrane bioreactors (MBRs) have been widely used for municipal and industrial wastewater treatment around the world due to their advantages, which include higher efficiency, smaller footprint, and lower sludge production over other conventional activated sludge (CAS) processes. However, membrane fouling that results from physicochemical interactions between the membrane and the components of the mixed liquor still remains the most challenging matter preventing the broad application of MBR technology. Recently, a considerable number of experimental and modelling investigations have been conducted concerning MBRs and membrane fouling. Despite the development of low‐fouling membrane systems, more research and engineering activities with a focus on surface modification, wastewater specifications, pre‐treatment and treatment conditions, and efficient fouling control and remedy strategies are still needed to minimize the probability of the occurrence of fouling. It is vital to investigate important aspects of the characterization and mechanisms of the fouling phenomenon to find reliable and long‐term solutions. This review provides a detailed survey of the main aspects of the MBR processes, configurations, advantages and disadvantages, fouling phenomenon, and fouling control strategies in MBRs. Past research and engineering activities in this area are critically reviewed such that pros and cons of recent developments in fouling inhibition and mitigation approaches are also discussed. The main practical and theoretical challenges for the effective utilization of MBRs in various municipal and industrial sectors are then addressed. At the end, we offer useful practical guidelines and recommendations for the better design and operation of MBRs in industrial and public communities.

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Research Background and Literature Review

Wang

2020

Development of Novel Bioelectrochemical Membrane Separation Technologies for Wastewater Treatment and Resource Recovery

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Nitrogen removal in submerged MBR with intermittent aeration

Cited by 16 publications

References 17 publications

Impact of saline valorization in contaminated municipal wastewater on the treatment performance and bacterial community dynamics of a membrane bioreactor

Impact of saline valorization in contaminated municipal wastewater on the treatment performance and bacterial community dynamics of a membrane bioreactor

Current Status and Future Prospects of Membrane Bioreactors (MBRs) and Fouling Phenomena: A Systematic Review

Research Background and Literature Review

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