Aerobic Granular Sludge–Membrane BioReactor (AGS–MBR) as a Novel Configuration for Wastewater Treatment and Fouling Mitigation: A Mini-Review

Campo, Riccardo; Lubello, Claudio; Lotti, Tommaso; Bella, Gaetano Di

doi:10.3390/membranes11040261

Cited by 18 publications

(6 citation statements)

References 54 publications

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“…However, MBRs can suffer from membrane fouling, which reduces the filtration capacity partially or completely obstructing the membrane pores (Zouboulis & Gkotsis, 2020). Aerobic granular activated sludge is considered a remedial strategy for fouling; however, long-term utilization typically involves degradation of the granules, which eventually results in membrane blockage (Campo et al, 2021). Moreover, a study of a sequential batch MBR (SB MBR) for 124 days reported reduced fouling due to erosive action of microplastic particles present during treatment (Maliwan et al, 2021).…”

Section: Membrane Bioreactorsmentioning

confidence: 99%

Global distribution of microplastic contaminants in aquatic environments and their remediation strategies

Tirkey

Pandey

Tiwari

et al. 2022

Water Environment Research

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This review describes the occurrence and distribution of microplastics in freshwater and marine environments in recent years (2017–2022). Use of microplastics often results in contamination of aquatic environments, threatens biodiversity, and creates the need for environmental remediation. Such remediation strategies can involve primary, secondary, and tertiary treatments. Tertiary treatment is a frequent research subject due to its high efficiency and the possibility for advancements and enhancements. This study discusses tertiary treatments with remediation efficiencies of 95% and greater and their advantages, disadvantages, and future perspectives. Biochar‐mediated remediation of microplastics is an effective method that may be able to achieve efficiencies approaching 100%. The study concludes by exploring methods of removing microplastics, including constructed wetlands and biochar, which offer high efficiency. Practitioner Points Tertiary treatments are an effective microplastic remediation strategy applicable succeeding secondary or primary treatments or as an individual remediation strategy. Biochar is a highly efficient adsorbent for microplastic remediation from aquatic environment with eco‐friendly aspect and reusability. Modifications in tertiary treatments and enhancement in remediation efficiency are still a subject of research for future studies.

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Section: Membrane Bioreactorsmentioning

confidence: 99%

Global distribution of microplastic contaminants in aquatic environments and their remediation strategies

Tirkey

Pandey

Tiwari

et al. 2022

Water Environment Research

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“…In such cases, the application of continuous AGS-MBR systems enjoys the advantages of both granular and membrane technologies, enabling the production of treated water with tertiary quality. Moreover, AGS-MBR technology significantly reduces membrane-fouling processes, probably a very important problem in membrane systems [63,64].…”

Section: (D) Cfr With Submerged Membranesmentioning

confidence: 99%

“…Water 2021, 13, x FOR PEER REVIEW 12 of 21 nificantly reduces membrane-fouling processes, probably a very important problem in membrane systems [63,64]. When AGS-MBR systems are implemented in continuous mode, the main problem pertains to keeping the granular biomass stable for long periods of time, due to the lack of a starvation phase, which avoids the collapse of granules.…”

Section: Physicochemical Parameters and Granular Formation In Cfr Systemsmentioning

confidence: 99%

New Advances in Aerobic Granular Sludge Technology Using Continuous Flow Reactors: Engineering and Microbiological Aspects

Rosa-Masegosa

Muñoz-Palazon

González‐Martínez

et al. 2021

Water

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Aerobic granular sludge (AGS) comprises an aggregation of microbial cells in a tridimensional matrix, which is able to remove carbon, nitrogen and phosphorous as well as other pollutants in a single bioreactor under the same operational conditions. During the past decades, the feasibility of implementing AGS in wastewater treatment plants (WWTPs) for treating sewage using fundamentally sequential batch reactors (SBRs) has been studied. However, granular sludge technology using SBRs has several disadvantages. For instance, it can present certain drawbacks for the treatment of high flow rates; furthermore, the quantity of retained biomass is limited by volume exchange. Therefore, the development of continuous flow reactors (CFRs) has come to be regarded as a more competitive option. This is why numerous investigations have been undertaken in recent years in search of different designs of CFR systems that would enable the effective treatment of urban and industrial wastewater, keeping the stability of granular biomass. However, despite these efforts, satisfactory results have yet to be achieved. Consequently, it remains necessary to carry out new technical approaches that would provide more effective and efficient AGS-CFR systems. In particular, it is imperative to develop continuous flow granular systems that can both retain granular biomass and efficiently treat wastewater, obviously with low construction, maintenance and exploitation cost. In this review, we collect the most recent information on different technological approaches aimed at establishing AGS-CFR systems, making possible their upscaling to real plant conditions. We discuss the advantages and disadvantages of these proposals and suggest future trends in the application of aerobic granular systems. Accordingly, we analyze the most significant technical and biological implications of this innovative technology.

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“…Campo et al [56] provided an interesting review of the effect of aerobic granular sludge (AGS) on the membrane fouling problem in membrane bioreactors (MBR). This combined solution (AGS-MBR) could potentially avoid the main issue of the membrane reactors, which is the membrane fouling that causes the occlusion of the upflow.…”

Section: Anmbr Reactormentioning

confidence: 99%

A Review of the State of the Art of Biomethane Production: Recent Advancements and Integration of Renewable Energies

et al. 2021

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Anaerobic Digestion (AD) is a well-established process that is becoming increasingly popular, especially as a technology for organic waste treatment; the process produces biogas, which can be upgraded to biomethane, which can be used in the transport sector or injected into the natural gas grid. Considering the sensitivity of Anaerobic Digestion to several process parameters, mathematical modeling and numerical simulations can be useful to improve both design and control of the process. Therefore, several different modeling approaches were presented in the literature, aiming at providing suitable tools for the design and simulation of these systems. The purpose of this study is to analyze the recent advancements in the biomethane production from different points of view. Special attention is paid to the integration of this technology with additional renewable energy sources, such as solar, geothermal and wind, aimed at achieving a fully renewable biomethane production. In this case, auxiliary heat may be provided by solar thermal or geothermal energy, while wind or photovoltaic plants can provide auxiliary electricity. Recent advancements in plants design, biomethane production and mathematical modeling are shown in the paper, and the main challenges that these fields must face with are discussed. Considering the increasing interest of industries, public policy makers and researchers in this field, the efficiency and profitability such hybrid renewable solutions for biomethane production are expected to significantly improve in the next future, provided that suitable subsidies and funding policies are implemented to support their development.

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Aerobic Granular Sludge–Membrane BioReactor (AGS–MBR) as a Novel Configuration for Wastewater Treatment and Fouling Mitigation: A Mini-Review

Cited by 18 publications

References 54 publications

Global distribution of microplastic contaminants in aquatic environments and their remediation strategies

Global distribution of microplastic contaminants in aquatic environments and their remediation strategies

New Advances in Aerobic Granular Sludge Technology Using Continuous Flow Reactors: Engineering and Microbiological Aspects

A Review of the State of the Art of Biomethane Production: Recent Advancements and Integration of Renewable Energies

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