Investigation of Ag and magnetite nanoparticle effect on the membrane fouling in membrane bioreactor

Sabalanvand, S.; Hazrati, Hossein; Jafarzadeh, Y.; Jafarizad, Abbas; Gharibian, Soorena

doi:10.1007/s13762-020-03053-9

Cited by 12 publications

(6 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…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%

“…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. In other words, although modified Ag nanoparticles embedded within a membrane matrix could reject MOs, 23 they are prone to be covered by substances secreted by MOs present in activated sludge.…”

Section: Membrane Fouling Mechanisms In Smbrsmentioning

confidence: 99%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

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).

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Membrane Fouling Mechanisms In Smbrsmentioning

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

View full text Add to dashboard Cite

show abstract

“…Для этой цели на свободные поверхности элементов мембран прививают сополимеры, образующие «щетки», которые пропускают или задерживают селективно примеси [23]. Инновационные разработки направлены на создание композитных мембран для очистки воды в трех основных направлениях: (1) неорганические -органические нанокомпозитные мембраны, в том числе мембраны c ориентированными углеродными нанотрубками; (2) гибридные белок-полимерные биомиметические мембраны и (3) «умные» (smart) композитные мембраны, которые предсказуемо реагируют на контакт с примесью из воды [28,[36][37][38][39][40][41][42][43][44].…”

Section: новые мембраныunclassified

“…В качестве компонентов таких мембран используются гидрофильные наночастицы оксидов металлов (Al2O3, TiO2, цеолит), наночастицы со свойством обеззараживания (Ag или углеродные нанотрубки), (фото)каталитические наноматериалы (TiO2, биметаллические наночастицы). Сложная структура материала мебран позволяет регулировать селективность, обеспечивать устойчивость к заиливанию за счет увеличения гидрофильности поверхности мембран, повышенную механическую и термическую стабильность [40].…”

Section: новые мембраныunclassified

New Composite Materials and Processes for Chemical, Physico-Chemical and Biochemical Technologies of Water Purification

2023

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.

View full text Add to dashboard Cite

In traditional methods of water purification, the use of chemical reagents leads to the appearance of toxic by-products and wastes that require complex energy-consumption processing technologies. In accordance with the principles of sustainable development and “green” technologies, a significant revision of existing water treatment methods is required. The review highlights the main trends of innovative development of water purification and disinfection technologies. Modifications of water treatment agents (flocculants, sorbents, membranes) by integration of nanoparticles, environmentally compatible materials and “smart” composites into traditional structures are described. The use of composite nanoparticles is promising, particularly the use of particles with the “magnetic core – shell” structure, in which functional elements are attached to the surface, that provide the selective capture of contaminants, including pathogenic microorganisms. The existence of the magnetic core makes it possible to manipulate particles by the applied magnetic field, which is important for their complete extraction from the water upon completion of their functions. The use of new composite flocculants containing inorganic and organic components capable of ensuring highly effective capture of contaminants from the water, significantly reduces the volumes of flocculants and generated sludges and therefore allows to reduce the cost of the sludges processing and the harm of their disposal in the environment. New carbon nanostructures and natural polymers have an important role to play. In the new generation membranes, the disperse nanoparticles may provide antibacterial and photocatalytic properties, resulting in the high efficiency of disinfection and purification. A novel trend is the development of hybrid structures of coagulants and membranes with the properties which are regulated by the external stimulus, which are temperature, pH, light, electric, magnetic and electromagnetic fields. The use of such «smart» structures will increase the purification efficiency, reduce energy consumption and water purification waste volumes, due to the decrease in membranes fouling. The use of biopolymers and composites based on plant raw materials for the water purification is attractive due to their natural decontamination under the influence of the components of the environment, such as air, soil micro-organisms and sunlight, but also due to the absence of the secondary pollution. Among innovative chemical water treatment technologies Advanced Oxidation Processes play an important role, in particular, by involving electromagnetic fields and ultrasonic activation. By these methods, harmful organic impurities and pathogens are destroyed without the intensive use of chemicals or the production of toxic by-products. The integration of biochemical wastewater treatment with a microalgae growing system can become a promising waste-free, cost-effective "green" technology.

show abstract

“…Du et al [71] discussed the strategies to improve the antifouling characteristics of membranes which include chemical copolymerization, physical blending, surface grafting, hydrophilic modification, and low-temperature plasma surface treatment. Sabalanvand et al [72] synthesized Fe 3 O 4 nanoparticles (NPs) as magnetic material and Ag NPs as antibacterial substances and utilized them in the MBR system to control membrane fouling. Both NPs were found efficient in absorbing organic matter and thus imparts higher COD removal efficiency.…”

Section: Membrane Bioreactormentioning

confidence: 99%

Bioremediation of industrial effluents: A synergistic approach

Nagda

Meena

Shah³

2021

J Basic Microbiol

View full text Add to dashboard Cite

Industrial wastewater consists of inorganic and organic toxic pollutants that pose a threat to environmental sustainability. The organic pollutants are a menace to the environment and life forms than the inorganic substances and pose teratogenic, mutagenic, carcinogenic, and other serious detrimental effects on the living entities, moreover, they have a gene-altering effect on aquatic life forms and affect the soil fertility and quality. Removal of varying effluents having recalcitrant contaminants with conventional treatment technologies is strenuous. In contrast to physical and chemical methods, biological treatment methods are environmentally friendly, versatile, efficient, and technically feasible with low operational costs and energy footprints. Biological treatment is a secondary wastewater treatment system that utilizes the metabolic activities of microorganisms to oxidize or reduce inorganic and organic compounds and transform them into dense biomass, which later can be removed by the sedimentation process. Biological treatment in bioreactors is an ex situ method of bioremediation and provides the benefits of continuous monitoring under controlled parameters. This paper attempts to provide a review of bioremediation technologies discussing most concerning widespread bioreactors and advances used for different industrial effluents with their comparative merits and limitations.

show abstract

Investigation of Ag and magnetite nanoparticle effect on the membrane fouling in membrane bioreactor

Cited by 12 publications

References 72 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

New Composite Materials and Processes for Chemical, Physico-Chemical and Biochemical Technologies of Water Purification

Bioremediation of industrial effluents: A synergistic approach

Contact Info

Product

Resources

About