Preparation of antibiofouling nanocomposite PVDF/Ag-SiO2 membrane and long-term performance evaluation in the MBR system fed by real pharmaceutical wastewater

Ahsani, Mina; Hazrati, Hossein; Javadi, M.; Ulbricht, Mathias; Yegani, Reza

doi:10.1016/j.seppur.2020.116938

Cited by 88 publications

(34 citation statements)

References 52 publications

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“…Decreased IFR in M‐SMBR having the antibiofouling PVC/PC/MAg nanocomposite membrane could be interpreted in this way: modified Ag nanoparticles deterred MOs from approaching the membrane. As Ag nanoparticles have enormous potential for making MOs inactive during filtration processes when they are incorporated into the membranes, a wealth of research has been conducted to control membrane fouling by incorporating Ag nanoparticles in fabricated membranes 20,35,37,38 . However, having produced EPSs and SMPs, MOs could adversely affect membrane performances.…”

Section: Resultsmentioning

confidence: 99%

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Membrane fouling and removal performance of submerged aerobic membrane bioreactors: a comparative study of optimizing operational conditions and membrane modification

Oghyanous

Etemadi

Yegani

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND The effects of sludge retention time, organic loading rate, specific aeration demand per membrane area (SADm) and exploiting poly(vinyl chloride)/polycarbonate/modified silver nanoparticles (PVC/PC/MAg) nanocomposite membrane in membrane fouling and removal performance of submerged membrane bioreactors (SMBRs) were compared. A reference membrane bioreactor (R‐SMBR) having a pure PVC/PC hollow fiber membrane module and no operational condition improvement was used as a reference for comparison. RESULTS The results revealed that all of the parameters had a considerable influence on improving membrane fouling, among which optimizing SADm and installing nanocomposite membranes in the SMBRs had comparable performances. Although the nanocomposite membrane had excellent potential to boost the membrane flux up to 62% in comparison with the R‐SMBR, it did not play any noticeable roles in rectifying the removal efficiency of the SMBR. On the other hand, not only did SADm increase the membrane flux up to 55%, but it also increased about 5% of COD and 3% of NH4+‐N removal. CONCLUSIONS Sludge characteristics were not affected by membrane modification since the concentration of extracellular polymeric substances, soluble microbial products and mean particle size were 110 ± 1 mg g−1 VSS, 54 ± 1 mg L−1 and 50 μm, respectively, for both the R‐SMBR and the SMBR in which the modified membrane was installed. However, the operational parameters could also modify the treatment performance of the SMBRs by positively impacting on sludge characteristics besides mitigating membrane fouling. © 2021 Society of Chemical Industry (SCI).

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Section: Resultsmentioning

confidence: 99%

“…Embedding nanoparticles into polymeric membranes is widely used to control membrane fouling in MBRs 19 . Ahsani et al 20 . prepared poly(vinylidene fluoride) (PVDF)/Ag–SiO 2 antibiofouling nanocomposite membranes, and reported that the fouling of the membranes was reduced sharply.…”

Section: Introductionmentioning

confidence: 99%

Membrane fouling and removal performance of submerged aerobic membrane bioreactors: a comparative study of optimizing operational conditions and membrane modification

Oghyanous

Etemadi

Yegani

et al. 2021

J of Chemical Tech & Biotech

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“…Moreover, the pristine membrane operation stability was limited to 20 h during MBR run, while the modified membrane continued to operate for a longer period with effective resistance against fouling. Ahsani et al 57 fabricated PVDF nanocomposite membrane with immobilized Ag-SiO 2 nanoparticles and tested it in a submerged MBR system treating real pharmaceutical wastewater. The nanocomposite membrane showed improved hydrophilicity and considerable antibiofouling ability with FRR of 76%, while the neat membrane surface exhibited more extracellular polymeric substance with a lower FRR of 58%.…”

Section: Nanoparticles Membrane Bioreactor (Nps-mbr)mentioning

confidence: 99%

“…Hence, we present a critical review of the recent developments on the nanomaterials membrane bioreactor (NMs-MBR) technology for wastewater treatment in the current work and all existing papers have been covered. Based on structural characteristics and suitability for wastewater treatment, different types of nanomaterials membrane bioreactors can be classified as follows: (1) nanofibers membrane bioreactor (NFs-MBR) 55,56 , (2) nanoparticles membrane bioreactor (NPs-MBR) 57,58 , (3) nanotubes membrane bioreactor (NTs-MBR) 59,60 , (4) nanocrystals membrane bioreactor (NCs-MBR) 61,62 , (5) nanowires membrane bioreactor (NWs-MBR) 63 , and (6) nanosheets membrane bioreactor (NSs-MBR) 64,65 (Fig. 1a).…”

Section: Introductionmentioning

confidence: 99%

A critical review on nanomaterials membrane bioreactor (NMs-MBR) for wastewater treatment

et al. 2020

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The concept of nanomaterials membranes (NMs) promises to be a sustainable route to improve the membrane characteristics and enhance the performance of membrane bioreactors (MBRs) treating wastewater. This paper provided a critical review of recent studies on the use of membranes incorporating nanomaterials in membrane bioreactor (NMs-MBR) applications for wastewater treatment. Novel types of nanomaterials membranes were identified and discussed based on their structural morphologies. For each type, their design and fabrication, advances and potentialities were presented. The performance of NMs-MBR system has been summarized in terms of removal efficiencies of common pollutants and membrane fouling. The review also highlighted the sustainability and cost viability aspects of NMs-MBR technology that can enhance their widespread use in wastewater treatment applications.

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“…Compatibility between inorganic and organic components One of the major issues with the nanocomposite membranes is the low compatibility between polymeric and inorganic components, which can cause aggregation of inorganic particles and separation of the two components, leading to poor performance, particularly in membrane stability. The stability of inorganic components in polymeric matrix has been performed by leaching test, exclusively in metal NPs-polymer membranes [54][55][56]. By contrast, in ceramic-polymer composite, the stability has been usually examined by the long-term antifouling test [57][58][59].…”

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confidence: 99%

Ceramic-Polymer Composite Membranes for Water and Wastewater Treatment: Bridging the Big Gap between Ceramics and Polymers

Kotobuki

Zhang

et al. 2021

Molecules

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Clean water supply is an essential element for the entire sustainable human society, and the economic and technology development. Membrane filtration for water and wastewater treatments is the premier choice due to its high energy efficiency and effectiveness, where the separation is performed by passing water molecules through purposely tuned pores of membranes selectively without phase change and additional chemicals. Ceramics and polymers are two main candidate materials for membranes, where the majority has been made of polymeric materials, due to the low cost, easy processing, and tunability in pore configurations. In contrast, ceramic membranes have much better performance, extra-long service life, mechanical robustness, and high thermal and chemical stabilities, and they have also been applied in gas, petrochemical, food-beverage, and pharmaceutical industries, where most of polymeric membranes cannot perform properly. However, one of the main drawbacks of ceramic membranes is the high manufacturing cost, which is about three to five times higher than that of common polymeric types. To fill the large gap between the competing ceramic and polymeric membranes, one apparent solution is to develop a ceramic-polymer composite type. Indeed, the properly engineered ceramic-polymer composite membranes are able to integrate the advantages of both ceramic and polymeric materials together, providing improvement in membrane performance for efficient separation, raised life span and additional functionalities. In this overview, we first thoroughly examine three types of ceramic-polymer composite membranes, (i) ceramics in polymer membranes (nanocomposite membranes), (ii) thin film nanocomposite (TFN) membranes, and (iii) ceramic-supported polymer membranes. In the past decade, great progress has been made in improving the compatibility between ceramics and polymers, while the synergy between them has been among the main pursuits, especially in the development of the high performing nanocomposite membranes for water and wastewater treatment at lowered manufacturing cost. By looking into strategies to improve the compatibility among ceramic and polymeric components, we will conclude with briefing on the perspectives and challenges for the future development of the composite membranes.

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Preparation of antibiofouling nanocomposite PVDF/Ag-SiO2 membrane and long-term performance evaluation in the MBR system fed by real pharmaceutical wastewater

Cited by 88 publications

References 52 publications

Membrane fouling and removal performance of submerged aerobic membrane bioreactors: a comparative study of optimizing operational conditions and membrane modification

Membrane fouling and removal performance of submerged aerobic membrane bioreactors: a comparative study of optimizing operational conditions and membrane modification

A critical review on nanomaterials membrane bioreactor (NMs-MBR) for wastewater treatment

Ceramic-Polymer Composite Membranes for Water and Wastewater Treatment: Bridging the Big Gap between Ceramics and Polymers

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