Removal of Organic Micro-Pollutants by Conventional Membrane Bioreactors and High-Retention Membrane Bioreactors

Pathak, Nirenkumar; Tran, Van Huy; Merenda, Andrea; Johir, M.A.H.; Phuntsho, Sherub; Shon, Ho Kyong

doi:10.3390/app10082969

Cited by 32 publications

(8 citation statements)

References 117 publications

(265 reference statements)

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“…Enormous population growth has increased the industrial agricultural demands, resulting in increasing micro-pollutant concentrations in the environment. The increased concentration of micro-pollutants in the environment due to constant release, even at trace concentrations (ng/L), from wastewater-treatment plants into water bodies is of great environmental and public health concern [ 6 ]. Hence, in this study, the pharmaceutical compound and indicator of antibiotic pollution ‘sulfamethoxazole (SMX) was chosen as the target pollutant for immobilized-laccase-based bio-catalytical degradation.…”

Section: Introductionmentioning

confidence: 99%

Chitosan-Grafted Halloysite Nanotubes-Fe3O4 Composite for Laccase-Immobilization and Sulfamethoxazole-Degradation

et al. 2020

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A surface-engineered nano-support for enzyme laccase-immobilization was designed by grafting the surface of halloysite nanotubes (HNTs) with Fe3O4 nanoparticles and chitosan. Herein, HNTs were magnetized (HNTs-M) by a cost-effective reduction-precipitation method. The synthesized HNTs-M were grafted with 0.25%, 0.5%, 1%, and 2% chitosan (HNTs-M-chitosan), respectively. Synthesized HNTs-M-chitosan (0.25%), HNTs-M-chitosan (0.5%), HNTs-M-chitosan (1%) and HNTs-M-chitosan (2%) were linked with glutaraldehyde (GTA) for laccase immobilization. Among these formulations, HNTs-M-chitosan (1%) exhibited the highest laccase immobilization with 95.13% activity recovery and 100.12 mg/g of laccase loading. The optimized material was characterized thoroughly by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), X-ray powder diffraction (XRD), thermal gravimetric analysis (TGA), and vibrating sample magnetometer (VSM) analysis. The immobilized laccase (HNTs-M-chitosan (1%)-GTA-Laccase) exhibited higher pH, temperature, and storage stabilities. The HNTs-M-chitosan (1%)-GTA-Laccase possesses excellent reusability capabilities. At the end of 10 cycles of the reusability experiment, HNTs-M-chitosan (1%)-GTA-Laccase retained 59.88% of its initial activity. The immobilized laccase was utilized for redox-mediated degradation of sulfamethoxazole (SMX), resulting in 41%, 59%, and 62% degradation of SMX in the presence of 2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS), guaiacol (GUA), and syringaldehyde (SA), respectively. Repeated SMX degradation (57.10% after the sixth cycle) confirmed the potential of HNTs-M-chitosan (1%)-GTA-Laccase for environmental pollutant degradation. Thus, we successfully designed chitosan-based, rapidly separable super-magnetic nanotubes for efficacious enhancement of laccase biocatalysis, which can be applied as nano-supports for other enzymes.

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Section: Introductionmentioning

confidence: 99%

Chitosan-Grafted Halloysite Nanotubes-Fe3O4 Composite for Laccase-Immobilization and Sulfamethoxazole-Degradation

et al. 2020

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“…Membrane bioreactor (MBR) technology in water reclamation and recycling is promising for saving large quantity of water from industrial and municipal wastewater that can be used for gardening, car washing, and cooling processes. Potential applications of this technology have also been evaluated for removing compounds of emerging concerns [ 222 , 223 ] and nutrient recovery as a substitute for nitrification/denitrification process [ 224 , 225 ].…”

Section: Environmental Applicationmentioning

confidence: 99%

“… System configurations of MBRs: ( a ) immersed MBR and ( b ) side-stream MBR. Reprinted from [ 223 ] under open access license. …”

Section: Figurementioning

confidence: 99%

“…Inclusion of particles or chemical carriers in biofilm membrane bioreactors (BF-MBR) reduces the transmembrane pressure (TMP) and fouling rate due to the attached biomass on biofilm carriers circulating in the aeration tank [229,230]. Higher effluent quality can be achieved using high retention membrane bioreactors (HRMBRs) where NF, FO, and MD membranes were combined with conventional MBRs because of the longer biodegradation time [223,231]. Electrospun membranes draw growing interest in water treatment bioreactors as well.…”

Section: Membrane Bioreactormentioning

confidence: 99%

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The Role of Electrospun Nanomaterials in the Future of Energy and Environment

2021

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Electrospinning is one of the most successful and efficient techniques for the fabrication of one-dimensional nanofibrous materials as they have widely been utilized in multiple application fields due to their intrinsic properties like high porosity, large surface area, good connectivity, wettability, and ease of fabrication from various materials. Together with current trends on energy conservation and environment remediation, a number of researchers have focused on the applications of nanofibers and their composites in this field as they have achieved some key results along the way with multiple materials and designs. In this review, recent advances on the application of nanofibers in the areas—including energy conversion, energy storage, and environmental aspects—are summarized with an outlook on their materials and structural designs. Also, this will provide a detailed overview on the future directions of demanding energy and environment fields.

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“…According to several investigations, various OMPs such as pharmaceuticals, pesticides, organic dyes have been frequently detected in the wastewater, surface water, and even in drinking water (see Fig. 1) [5,[8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Cold atmospheric plasma technology for removal of organic micropollutants from wastewater—a review

et al. 2021

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Water bodies are being contaminated daily due to industrial, agricultural and domestic effluents. In the last decades, harmful organic micropollutants (OMPs) have been detected in surface and groundwater at low concentrations due to the discharge of untreated effluent in natural water bodies. As a consequence, aquatic life and public health are endangered. Unfortunately, traditional water treatment methods are ineffective in the degradation of most OMPs. In recent years, advanced oxidation processes (AOPs) techniques have received extensive attention for the mineralization of OMPs in water in order to avoid serious environmental problems. Cold atmospheric plasma discharge-based AOPs have been proven a promising technology for the degradation of non-biodegradable organic substances like OMPs. This paper reviews a wide range of cold atmospheric plasma sources with their reactor configurations used for the degradation of OMPs (such as organic dyes, pharmaceuticals, and pesticides) in wastewater. The role of plasma and treatment parameters (e.g. input power, voltage, working gas, treatment time, OMPs concentrations, etc.) on the oxidation of various OMPs are discussed. Furthermore, the degradation kinetics, intermediates compounds formed by plasma, and the synergetic effect of plasma in combination with a catalyst are also reported in this review. GraphicAbstract

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Removal of Organic Micro-Pollutants by Conventional Membrane Bioreactors and High-Retention Membrane Bioreactors

Cited by 32 publications

References 117 publications

Chitosan-Grafted Halloysite Nanotubes-Fe3O4 Composite for Laccase-Immobilization and Sulfamethoxazole-Degradation

Chitosan-Grafted Halloysite Nanotubes-Fe3O4 Composite for Laccase-Immobilization and Sulfamethoxazole-Degradation

The Role of Electrospun Nanomaterials in the Future of Energy and Environment

Cold atmospheric plasma technology for removal of organic micropollutants from wastewater—a review

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