Effect of urea-based chemical cleaning on TrOCs rejection by nanofiltration membranes

Zhou, Zhiwei; Yan, Yaohua; Li, Xing; Zeng, Fanxi; Shao, Senlin

doi:10.1016/j.seppur.2023.123662

Cited by 7 publications

(3 citation statements)

References 47 publications

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“…Recent research on urea/HCl cleaning of membranes has shown specific cleaning of NF270, resulting in a lesser impact on trace organic compounds (TrOCs) than NaOH/HCl cleaning. This method also slightly increases the pore size slightly and the hydrophilicity of the membrane, marginally affecting zeta potential and membrane crosslinking (Zhou et al, 2023).…”

Section: Nanofiltrationmentioning

confidence: 99%

Tuning of polymeric membranes to mitigate fouling and removal of dissolved compounds for wastewater treatment: a Review

Tarun,

Dakshesh,

Arthanareeswaran

2024

Front. Membr. Sci. Technol.

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Wastewater, referred to as sewage, has been a byproduct of human settlement since ancient times. An increase in human activities leads to more wastewater effluents, resulting in higher concentrations of organic compounds, which are harmful to all forms of living organisms and drinking water purposes. Traditional methods cannot satisfy this issue for higher concentrations. The advanced membrane process is an alternative to this conventional method for removing organic compounds and various effluents due to its high permeate quality and less toxicity. Moreover, the modification of polymeric membranes by increasing its content led to a higher flux thereby enhancing the fouling property for effective wastewater treatment. The processes, UF, RO, NF, and FO, ion exchange, MD, and pervaporation, were developed for more robust methods to improve the quality of the environment and lead to higher salt rejection. This review provides an overview of the fabrications, methods and modifications of substrates utilized in different processes with varying modules to achieve a higher flux rate, lowering the fouling. We discuss the materials used for various membrane modules in ceramic membranes under different operating circumstances and the methods to enhance the performance of membrane fouling. This review also aims to track the ongoing research works to broaden different process combinations for further research purposes, showcasing better antifouling performance and maximizing water quality in the future.

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Section: Nanofiltrationmentioning

confidence: 99%

Tuning of polymeric membranes to mitigate fouling and removal of dissolved compounds for wastewater treatment: a Review

Tarun,

Dakshesh,

Arthanareeswaran

2024

Front. Membr. Sci. Technol.

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“…Like other membrane-based processes, membrane fouling is a major issue facing by MBR NF . To mitigate membrane fouling, chemical cleaning with NaClO is generally carried out when the transmembrane pressure (TMP) is excessively high, and the cleaning interval is 1–6 weeks for a typical MBR MF . , For a MBR NF , however, this short cleaning interval is generally unfavorable because (1) most commercial NF membranes are vulnerable to chlorine , and (2) cleaning in place is difficult to implement for submerged NF modules. Therefore, a very low fouling rate is essential for the practical use of MBR NF .…”

Section: Introductionmentioning

confidence: 99%

“…9 To mitigate membrane fouling, chemical cleaning with NaClO is generally carried out when the transmembrane pressure (TMP) is excessively high, and the cleaning interval is 1−6 weeks for a typical MBR MF . 20,21 For a MBR NF , however, this short cleaning interval is generally unfavorable because (1) most commercial NF membranes are vulnerable to chlorine 22,23 use of MBR NF . In recent literature related to gravity-driven MBRs, researchers found that the fouling resistances remained at low levels over several months when operated at ultralow fluxes of <5 L•m −2 •h −1 (mostly in the range of 1−2 L•m −2 • h −1 ), 24−26 even without intensive physical cleaning.…”

Section: ■ Introductionmentioning

confidence: 99%

Nanofiltration-Based Membrane Bioreactor Operated under an Ultralow Flux: Fouling Behavior and Feasibility toward a Low-Carbon System for Municipal Wastewater Reuse

et al. 2023

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Compared to a conventional membrane bioreactor (MBR) with a porous microfiltration (MF) membrane (MBRMF), a nanofiltration (NF)-based MBR (MBRNF) shows highly attractive features such as high permeate water quality. However, the practical applications of MBRNF are often hindered by the high driven pressures and severe membrane fouling. To address these two critical issues, this study investigated the feasibility of operating MBRNF at an ultralow flux (ULF, e.g., <5 L·m–2·h–1) toward the reuse of municipal wastewater in a single step. We operated the ULF MBRNF at a flux of 2 L·m–2·h–1 and benchmarked its performance against a conventional system using a MBRMF followed by a subsequent NF treatment (MBRMF + NF, both at a constant flux of 20 L·m–2·h–1). The results show that the ULF MBRNF achieved substantial removal of most pollutants, with low negative impacts of ultralow fluxes on pollutant rejections. Besides, the ultralow-flux operation led to a very low fouling rate (0.18 kPa·d–1). More importantly, the ULF MBRNF reduced carbon emissions by 45.2% compared with the MBRMF + NF, mainly due to less energy consumption by pumping. Our findings highlight the simplicity and great potential of ULF MBRNF for wastewater reuse.

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Investigation of filtration performance and phosphorus removal in an electric field controlled dynamic membrane bioreactor

Chen,

Lv,

Ding

et al. 2023

Chemical Engineering Journal

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Effect of urea-based chemical cleaning on TrOCs rejection by nanofiltration membranes

Cited by 7 publications

References 47 publications

Tuning of polymeric membranes to mitigate fouling and removal of dissolved compounds for wastewater treatment: a Review

Tuning of polymeric membranes to mitigate fouling and removal of dissolved compounds for wastewater treatment: a Review

Nanofiltration-Based Membrane Bioreactor Operated under an Ultralow Flux: Fouling Behavior and Feasibility toward a Low-Carbon System for Municipal Wastewater Reuse

Investigation of filtration performance and phosphorus removal in an electric field controlled dynamic membrane bioreactor

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