Salt stress in a membrane bioreactor: Dynamics of sludge properties, membrane fouling and remediation through powdered activated carbon dosing

Temmerman, Leen De; Maere, Thomas; Temmink, Hardy; Zwijnenburg, A.; Nopens, Ingmar

doi:10.1016/j.watres.2014.06.017

Cited by 37 publications

(11 citation statements)

References 40 publications

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“…Some studies have highlighted that the superficial fouling resistance (and the negative effect of the cake compressibility level) can be reduced through the addition of suspended solids, like activated carbon or zeolites, or coagulant chemicals. Indeed, these compounds can promote the adsorption of specific organic molecules, such as polysaccharides and proteins, which constitute a primary source of macromolecule adhesion onto the membrane surface [22,142,143,144,145,146].…”

Section: Features Of the Superficial Deposition And Role Of Physicmentioning

confidence: 99%

A Brief Review on the Resistance-in-Series Model in Membrane Bioreactors (MBRs)

Bella

Trapani

2019

Membranes

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The cake layer deposited on the membrane modules of membrane bioreactors (MBRs), especially under a submerged configuration, represents a relevant and fundamental mechanism deeply influencing the development of membrane fouling. It negatively affects the total resistance to filtration, while exerting a positive effect as a “pre-filter” promoting the “dynamic membrane” that protects the physical membrane from internal fouling. These two opposite phenomena should be properly managed, where the submerged membranes are usually subjected to a periodical cake layer removal through ordinary (permeate backwashing and air scouring) and/or irregular cleaning actions (manual physical cleaning). In this context, the physical removal of the cake layer is needed to maintain the design filtration characteristics. Nevertheless, the proper evaluation of the effect of physical cleaning operations is still contradictory and under discussion, referring in particular to the correct evaluation of fouling mechanisms. The aim of the present work was to summarize the different aspects that influence the fouling investigations, based on simple models for the evaluation of the resistance to filtration due to the cake layer, through physical cleaning operations.

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Section: Features Of the Superficial Deposition And Role Of Physicmentioning

confidence: 99%

A Brief Review on the Resistance-in-Series Model in Membrane Bioreactors (MBRs)

Bella

Trapani

2019

Membranes

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“…This aspect is of particular concern when considering specific activities producing saline wastewater that might be characterised by highly recalcitrant, toxic and slowly biodegradable compounds, such as the fish canning, petroleum, petrochemical and tannery industries [1][2][3][4]. In this context, an important issue is represented by the treatment of wastewater produced during shipboard activities (bilge water or slops), which usually features high oily and saline concentrations [5].…”

Section: Introductionmentioning

confidence: 99%

Performance of membrane bioreactor (MBR) systems for the treatment of shipboard slops: Assessment of hydrocarbon biodegradation and biomass activity under salinity variation

Bella

Prima

Trapani

et al. 2015

Journal of Hazardous Materials

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“…On the other hand, at low air flow rates, the biological process is negatively affected, resulting in bioflocculation and cake layer formation through increasing EPS, SMP, and MLSS deposition on the membrane surface . Generally, the determination of an optimal air flow rate depends on the operating parameters, MBR configuration, and cyclic of aeration . As is shown in Table , the amount of aeration demand is different in various MBR systems.…”

Section: Membrane Foulingmentioning

confidence: 99%

“…The reduction of filamentous bacteria and protozoans in hypersaline wastewater leads to the deterioration of the mechanical integrity and structure of the flocs, sludge deflocculation, poor sludge quality, and a reduction of membrane permeability . In addition, high salt concentration causes more EPS and SMP production due to the incomplete degradation of organic substances and the release of cell contents to protect microbial cells from salt toxicity . All these changes eventually result in membrane fouling due to increasing pore blocking resistance …”

Section: Membrane Foulingmentioning

confidence: 99%

Current Status and Future Prospects of Membrane Bioreactors (MBRs) and Fouling Phenomena: A Systematic Review

et al. 2018

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Membrane bioreactors (MBRs) have been widely used for municipal and industrial wastewater treatment around the world due to their advantages, which include higher efficiency, smaller footprint, and lower sludge production over other conventional activated sludge (CAS) processes. However, membrane fouling that results from physicochemical interactions between the membrane and the components of the mixed liquor still remains the most challenging matter preventing the broad application of MBR technology. Recently, a considerable number of experimental and modelling investigations have been conducted concerning MBRs and membrane fouling. Despite the development of low‐fouling membrane systems, more research and engineering activities with a focus on surface modification, wastewater specifications, pre‐treatment and treatment conditions, and efficient fouling control and remedy strategies are still needed to minimize the probability of the occurrence of fouling. It is vital to investigate important aspects of the characterization and mechanisms of the fouling phenomenon to find reliable and long‐term solutions. This review provides a detailed survey of the main aspects of the MBR processes, configurations, advantages and disadvantages, fouling phenomenon, and fouling control strategies in MBRs. Past research and engineering activities in this area are critically reviewed such that pros and cons of recent developments in fouling inhibition and mitigation approaches are also discussed. The main practical and theoretical challenges for the effective utilization of MBRs in various municipal and industrial sectors are then addressed. At the end, we offer useful practical guidelines and recommendations for the better design and operation of MBRs in industrial and public communities.

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Salt stress in a membrane bioreactor: Dynamics of sludge properties, membrane fouling and remediation through powdered activated carbon dosing

Cited by 37 publications

References 40 publications

A Brief Review on the Resistance-in-Series Model in Membrane Bioreactors (MBRs)

A Brief Review on the Resistance-in-Series Model in Membrane Bioreactors (MBRs)

Performance of membrane bioreactor (MBR) systems for the treatment of shipboard slops: Assessment of hydrocarbon biodegradation and biomass activity under salinity variation

Current Status and Future Prospects of Membrane Bioreactors (MBRs) and Fouling Phenomena: A Systematic Review

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