Application of a backwashing strategy based on transmembrane pressure set-point in a tertiary submerged membrane bioreactor

Vera, Luisa; Cabrera, E; Díaz, Oliver; Delgado, S.

doi:10.1016/j.memsci.2014.07.069

Cited by 30 publications

(34 citation statements)

References 36 publications

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“…Physical cleaning approaches are typically implemented periodically for the effective removal of the fouling layer in order to prolong the filtration process and membrane lifespan in submerged membrane systems. Such approaches include relaxation (i.e., intermittent cessation of permeation), backwashing (i.e., reversal of permeate flow through the pores), and air backwashing with or without air scouring [25,[88][89][90][91]. Filtration duration, backwash and relaxation durations, and backwashing flowrate are important parameters in the fouling mitigation of submerged HF membranes [26,90,92,93].…”

Section: Fouling In Submerged Dead-end Filtrationmentioning

confidence: 99%

“…With respect to (ii), physical cleaning tends to remove reversible fouling while chemical cleaning can remove some irreversible fouling. The primary physical cleaning parameters include duration, frequency, and backwash flux [88,107,109,131,132], while the type and concentration of reagents are the important parameters for effective chemical cleaning [124,131,[133][134][135][136]. Regarding (iii), flux reduction is not as cost-effective as might be expected, but the attendant extension of membrane lifespan and smoother operation may counterbalance some of the increased cost.…”

Section: Blocking and Blocking Mitigation In Submerged Hf Modulesmentioning

confidence: 99%

“…The application of relaxation (intermittent cessation of permeation), backwashing (reversal of permeate flow through the pores), and air backwashing with or without air scouring are common physical approaches to remove fouling in submerged systems. It has been shown in many studies that relaxation and backwashing provide an effective removal of the fouling layer, thereby prolonging the filtration process in submerged membrane systems, especially at high imposed fluxes [88,90,131,286,287]. A significant challenge in the application of relaxation and backwashing is that only partial recovery of the permeability is achieved at the end of a filtration cycle, which implies a gradual loss of the effective filtration area due to fouling.…”

Section: Techniques For Fouling Control In Dead-end Submerged Membranmentioning

confidence: 99%

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The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

et al. 2017

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Abstract:The submerged membrane filtration concept is well-established for low-pressure microfiltration (MF) and ultrafiltration (UF) applications in the water industry, and has become a mainstream technology for surface-water treatment, pretreatment prior to reverse osmosis (RO), and membrane bioreactors (MBRs). Compared to submerged flat sheet (FS) membranes, submerged hollow fiber (HF) membranes are more common due to their advantages of higher packing density, the ability to induce movement by mechanisms such as bubbling, and the feasibility of backwashing. In view of the importance of submerged HF processes, this review aims to provide a comprehensive landscape of the current state-of-the-art systems, to serve as a guide for further improvements in submerged HF membranes and their applications. The topics covered include recent developments in submerged hollow fiber membrane systems, the challenges and developments in fouling-control methods, and treatment protocols for membrane permeability recovery. The highlighted research opportunities include optimizing the various means to manipulate the hydrodynamics for fouling mitigation, developing online monitoring devices, and extending the submerged HF concept beyond filtration.

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Section: Fouling In Submerged Dead-end Filtrationmentioning

confidence: 99%

Section: Blocking and Blocking Mitigation In Submerged Hf Modulesmentioning

confidence: 99%

Section: Techniques For Fouling Control In Dead-end Submerged Membranmentioning

confidence: 99%

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The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

et al. 2017

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“…The result observed an increment of filtration length, cleaning efficiency, and reasoning productivity, and these were achieved by implementing an automatic cleaning procedure. A similar strategy was adopted by Vera et al [51]. However, this work only covered a backwash frequency adjustment.…”

Section: Fouling Control Using a Backwash Operationmentioning

confidence: 99%

Fouling control strategy for submerged membrane bioreactor filtration processes using aeration airflow, backwash, and relaxation: a review

Yusuf

Wahab

Sahlan

2015

Desalination and Water Treatment

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A B S T R A C TAs of today, the application of membrane bioreactors (MBRs) in wastewater treatment plants has become significantly important in various industries. The success of MBR is mainly because of the effective membrane technology used in this kind of reactor. However, membrane technology does not escape from several drawbacks, which includes high maintenance costs and fouling problems. In order to run a plant with both an optimum capability and cost, an in-depth understanding of the behavior of filtration systems is very important to the plant operator. In this paper, we review and have considered the fouling control techniques applied to submerged membrane filtration processes including hollow fiber membranes and flat sheet types of membrane filtration. The review covers the techniques involving operational parameters, such as aeration, backwashing, and relaxation. In addition, in this paper, the modeling techniques and available automatic control techniques, using stated parameters to control fouling in membrane filtration processes, are presented. The performance results of each technique are then discussed and reviewed.

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“…During the membrane process, a membrane material that is impermeable to microbial cells is used for microfiltration to efficiently retain biomass. The most commonly used membrane for the MBR operating system is a fibre membrane with a pore size of 0.2-0.4 μm; the fibre can be either a hollow membrane fibre [13,94,95] or a flat sheet type of membrane [67] according to the reactor configuration. MBR operation via the application of an anaerobic technique also has been reported (AnMBR or Anaerobic Membrane Bioreactor) [5].…”

Section: Membrane Bioreactor (Mbr)mentioning

confidence: 99%

Enrichment of anaerobic ammonium oxidation (anammox) bacteria for short start-up of the anammox process: a review

Ibrahim

Yusof

Yusoff

et al. 2015

Desalination and Water Treatment

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A B S T R A C TThe application of the anaerobic ammonium oxidation (anammox) reaction in a biological nitrogen removal system to treat wastewater has become of great interest since its discovery. The anammox reaction is performed by anammox bacteria that belong to the Planctomycete phylum. The reaction occurs in the presence of ammonium using nitrite as the substrate under anaerobic conditions. However, the bacteria have an extremely slow growth rate and stringent metabolic conditions that cause difficulty in culturing and applying the system for wastewater treatment. Anammox enrichment has a long start-up period for the anammox process that hinders researchers using laboratory and full-scale systems for the first time. Many attempts have been made to culture anammox to establish a successful anammox culture with a shorter start-up period for the anammox reaction and high nitrogen removal activity. This paper reviews previous studies on anammox enrichment with emphasis on (i) inoculum selection, (ii) enrichment techniques and (iii) factors influencing anammox enrichment. This review will assist researchers in planning and designing an appropriate anammox enrichment. The findings should widen the application of anammox in biological nitrogen removal systems for nitrogenous wastewater.

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Application of a backwashing strategy based on transmembrane pressure set-point in a tertiary submerged membrane bioreactor

Cited by 30 publications

References 36 publications

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

Fouling control strategy for submerged membrane bioreactor filtration processes using aeration airflow, backwash, and relaxation: a review

Enrichment of anaerobic ammonium oxidation (anammox) bacteria for short start-up of the anammox process: a review

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