Microbial Communities on the Submerged Membranes in Full-Scale Membrane Bioreactors Treating Municipal Wastewater

Takada, Kazuki; Hashimoto, Kurumi; Soda, Satoshi; Ike, Michihiko; Makio, Takashi; Nakayama, Yasunari; Miyamoto, H; Yamashita, Kyoko; Hashimoto, Toshikazu

doi:10.1061/(asce)ee.1943-7870.0001294

Cited by 8 publications

(3 citation statements)

References 29 publications

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“…Different studies have highlighted the relationship between biofilm microbial communities and system performance in drinking water and wastewater biological treatment processes (e.g., drinking water biofilter, activated sludge). [16][17][18][19][20][21][22][23][24] It has also been shown that bacterial fouling on membranes is highly species-dependent, 25 and some low relative abundance bacteria may play an outsized ecological role in biofilm formation. 26 As the biofilm microbiome can play a significant role in system performance and effluent water quality, the present study aimed to characterize and evaluate the microbial communities in a gravity-driven WFMF treating secondary municipal wastewater for the target of water reuse.…”

Section: Introductionmentioning

confidence: 99%

Permeate microbiome reflects the biofilm microbial community in a gravity-driven woven-fiber microfiltration (WFMF) system for wastewater treatment

Huanambal-Sovero,

Abkar,

Ovie

et al. 2023

Environ. Sci.: Water Res. Technol.

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Section: Introductionmentioning

confidence: 99%

Permeate microbiome reflects the biofilm microbial community in a gravity-driven woven-fiber microfiltration (WFMF) system for wastewater treatment

Huanambal-Sovero,

Abkar,

Ovie

et al. 2023

Environ. Sci.: Water Res. Technol.

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“…Membrane bioreactor (MBR) is an attractive process in space limited areas by replacing the secondary sediment tank for the purpose of separation of water and biomass in wastewater treatment due to its small footprint (Fan et al, 2018;Shen et al, 2015;Yang et al, 2017). Nevertheless, they are usually suffered the problem of membrane fouling, leading to: firstly, an increase in TMP (transfer membrane pressure) under constant flux conditions; and secondly, a dramatic drop in the permeate flux under constant pressure conditions (Miller et al, 2014;Rajesh Banu et al, 2009;Takada et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Investigation of backwashing effectiveness in membrane bioreactor (MBR) based on different membrane fouling stages

Zhao

Wang

Zhang

et al. 2018

Bioresource Technology

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In this study the effect of different fouling stages of hollow fiber membranes on effective backwashing length in MBR has been investigated. Computational fluid dynamics (CFD) is imported to simulate backwashing process. A multi-physics coupling model for free porous media flow, convective mass transfer and diluted species transport was established. The laser bijection sensors (LBS) were imported to monitor the backwashing solution position inside fiber lumen. Simulation results indicated that membrane fouling degree could change the velocity of backwash solution inside fiber lumen and make a further effect on effective backwash length. The signal variations of LBS are in accordance with the simulation results. The backwashing process can only play an active role when the filtration pressure is below the critical TMP. It can be concluded that backwash duration in industrial applications need to be set based on changes in TMP.

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“…DNA was directly extracted from the activated sludge samples, whereas the biofilm samples were suspended in potassium phosphate buffer (KH 2PO4 50 mM, K2HPO4 50 mM; pH 7.5) as described in our previous study 16) before the extraction. The extracted DNA was purified using MagExtractor™-PCR & Gel Clean up-(Toyobo Corp., Japan).…”

Section: Dna Template Preparationmentioning

confidence: 99%

Bioaugmenting a Lab-Scale Membrane Bioreactor with 4-<i>tert</i>-butylphenol-degrading Bacterium, <i>Sphingobium fuliginis</i> OMI

Takada

Shiba

Soda

et al. 2018

Japanese J. Wat. Treat. Biol.

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This study demonstrated the bioaugmentation of a lab-scale membrane bioreactor (MBR) that enhanced 4-tert-butylphenol (4 -t-BP ) elimination by Sphingobium fuliginis OMI, which utilizes 4-t-BP as its sole carbon source. The control MBR, without bioaugmentation, needed an acclimation period of over 1 month to eliminate 4-t-BP with the help of indigenous 4-t-BP degraders. Contrastingly, the bioaugmented MBR removed 4-t-BP from the influent (10 -20 mg/L) to less than the detection limit (< 1 mg/L) within 7 days, and maintained 4-t-BP elimination until day 35. According to the real-time polymerase chain reaction quantifications of the catechol 2, 3-dioxygenase genes, the bioaugmented MBR maintained larger amounts of the genes until day 17 when compared to the control MBR, which indicated the survival of strain OMI in the bioaugmented MBR during the period. These results verified that MBRs had superiority for bioaugmentation as they prevented the introduced strains from washing-out. However, more frequent membrane fouling occurred in the bioaugmented MBR, which could be induced by strain OMI. The results suggested that membrane fouling is an important factor to be addressed for successful bioaugmentation in an MBR.

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Microbial Communities on the Submerged Membranes in Full-Scale Membrane Bioreactors Treating Municipal Wastewater

Cited by 8 publications

References 29 publications

Permeate microbiome reflects the biofilm microbial community in a gravity-driven woven-fiber microfiltration (WFMF) system for wastewater treatment

Permeate microbiome reflects the biofilm microbial community in a gravity-driven woven-fiber microfiltration (WFMF) system for wastewater treatment

Investigation of backwashing effectiveness in membrane bioreactor (MBR) based on different membrane fouling stages

Bioaugmenting a Lab-Scale Membrane Bioreactor with 4-<i>tert</i>-butylphenol-degrading Bacterium, <i>Sphingobium fuliginis</i> OMI

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