The impact of sunlight on fouling behaviors and microbial communities in membrane bioreactors

Park, Hyeona; Shah, Syed Salman Ali; Korshin, Gregory V.; Angelidaki, Irini; Choo, Kwang‐Ho

doi:10.1016/j.memsci.2023.121443

Cited by 17 publications

(8 citation statements)

References 54 publications

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“…Results from the aforementioned analyses illustrated that sunlight irradiation had obvious effects on the bacterial community. My results are identical to those of Park et al., [ 20 ] who considered that sunlight irradiation caused drastic changes in microbial communities and stimulated the preferential growth of specific bacteria (e.g., Deinococcus , Runella , Flavitalea , etc. ), although their main species of bacteria were different from mine due to differences in wastewater quality.…”

Section: Resultssupporting

confidence: 89%

“…SMPs and EPSs are not the main cause of fouling, confirmed by many researchers. [ 20,52,53 ] Meanwhile, almost all the studies showed that the fouling rate had indirect positive correlations with several genera, [ 11–13,20,52,53 ] including my study. Therefore, it is believed that the operation conditions of a reactor, such as in a continuous or intermittent mode, with or without sunlight exposure, will have a great impact on microorganisms and thus affect the sludge characteristics.…”

Section: Resultsmentioning

confidence: 87%

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Potential positive effects of natural sunlight on a biological system for landfill leachate treatment

Cai

2023

CLEAN Soil Air Water

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Activated sludge filtration performance is a significant mean to evaluate membrane fouling trend for wastewater treatment. Here the impact of sunlight irradiation on activated sludge filtration performance and microbial communities in sequencing batch reactors (SBRs) when treating raw landfill leachate were studied. The sludge in photic SBR (i.e., SBR exposed to natural sunlight) exhibited better filtration performance compared to dark SBR (i.e., SBR unexposed to sunlight). The removal efficiency of COD and NH4+‐N in the photic SBR were slightly higher than those in the dark SBR. The contents of the extracellular polymeric substances (EPSs) of sludge in both SBRs initially increased and then decreased. However, in the later period, the sludge filtration performance worsened due to the fungal activity in the dark SBR. Natural sunlight irradiation promoted sludge filtration performance by affecting the microorganism structure in the photic SBR. The bacterial genus Thauera was dominant in the photic SBR (39.35%), whereas Planktosalinus and Ottowia were dominant in the dark SBR (16.84% and 12.55%, respectively). Natural sunlight irradiation had a prominent effect on the fungal diversity in the system, and filamentous bulking caused by the fungi genus Trichosporon’s proliferation was observed in the dark SBR but not in the photic SBR, which also increased the polysaccharide content.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 87%

Potential positive effects of natural sunlight on a biological system for landfill leachate treatment

Cai

2023

CLEAN Soil Air Water

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“…Those observations are consistent with another study that concluded that sunlight irradiation causes changes in the microbial communities in MBRs. 67 For the present study, the difference was minor compared to the overall dissimilarities between the biofilm, permeate and influent samples.…”

Section: Indicator Microorganismsmentioning

confidence: 77%

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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“…Finally, considering the importance of BDOM at low-flow periods, we propose the addition of BDOM measurement in the existing and new monitoring stations. Innovative methods such as specific ultraviolet absorbance at 254 nm (SUVA 254 ) and fluorescence spectroscopy (Parlanti et al, 2000(Parlanti et al, , 2002Goffin et al, 2017) could be proposed for high-frequency measurement of OM and BDOM specifically. The monitoring stations shall be dense enough in space so that they could characterize the upstream tributary rivers and the outflow of anthropogenic sources such as WWTP and CSO.…”

Section: Consequences Of the Results On Water Quality Monitoring In U...mentioning

confidence: 99%

“…This phenomenon could be included in the model in a simplistic approach either by increasing bacterial mortality or decreasing its growth rate by a given factor. However, it is necessary to find experimental data in order to quantify the effects of solar radiation that also depend on the type of bacterial community (Park et al, 2023).…”

Section: Limitations Of the Sensitivity Analysismentioning

confidence: 99%

How much do bacterial growth properties and biodegradable dissolved organic matter control water quality at low flow?

et al. 2023

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Abstract. The development of accurate water quality modeling tools is necessary for integrated water quality management of river systems. Even though some water quality models can simulate dissolved oxygen (DO) concentrations accurately during high-flow periods and phytoplankton blooms in rivers, significant discrepancies remain during low-flow periods, when the dilution capacity of the rivers is reduced. We use the C-RIVE biogeochemical model to evaluate the influence of controlling parameters on DO simulations at low flow. Based on a coarse model pre-analysis, three sensitivity analyses (SAs) are carried out using the Sobol method. The parameters studied are related to bacterial community (e.g., bacterial growth rate), organic matter (OM; partitioning and degradation of OM into constituent fractions), and physical factors (e.g., reoxygenation of the river due to navigation and wind). Bacterial growth and mortality rates are found to be by far the two most influential parameters, followed by bacterial growth yield. More refined SA results indicate that the biodegradable fraction of dissolved organic matter (BDOM) and the bacterial growth yield are the most influential parameters under conditions of a high net bacterial growth rate (= growth rate − mortality rate), while bacterial growth yield is independently dominant in low net growth situations. Based on the results of this study, proposals are made for in situ measurement of BDOM under an urban area water quality monitoring network that provides high-frequency data. The results also indicate the need for bacterial community monitoring in order to detect potential bacterial community shifts after transient events such as combined sewer overflows and modifications in internal processes of treatment plants. Furthermore, we discuss the inclusion of BDOM in statistical water quality modeling software for improvement in the estimation of organic matter inflow from boundary conditions.

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The impact of sunlight on fouling behaviors and microbial communities in membrane bioreactors

Cited by 17 publications

References 54 publications

Potential positive effects of natural sunlight on a biological system for landfill leachate treatment

Potential positive effects of natural sunlight on a biological system for landfill leachate treatment

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

How much do bacterial growth properties and biodegradable dissolved organic matter control water quality at low flow?

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