Fouling control in activated sludge submerged hollow fiber membrane bioreactors

Hong, Seong Wook; Bae, Tae‐Hyun; Tak, TM; Hong, Seungkwan; Randall, Andrew A.

doi:10.1016/s0011-9164(02)00260-6

Cited by 269 publications

(123 citation statements)

References 15 publications

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“…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. Subsequently, in the next filtration cycle the less fouled areas will have to experience increased local fluxes to maintain the overall average flux, which in turn results in a higher fouling rate [94]. However, Figure 6, which shows a plot of the TMP versus time for both continuous and periodic backwashing and filtration, indicates that even with a partial recovery during each cycle, filtration with intermittent backwashing and relaxation outperforms continuous operation.…”

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

confidence: 99%

“…Filtration duration, backwash and relaxation durations, and backwashing flowrate are important parameters in the fouling mitigation of submerged HF membranes [26,90,92,93]. However, a major challenge in the application of these techniques is that the imposed permeate fluxes have to be elevated to maintain a given water production, which in turn could result in a higher fouling rate [94]. More details on backwashing and relaxation can be found in Section 7.…”

Section: Fouling In Submerged Dead-end Filtrationmentioning

confidence: 99%

“…Relaxation, the intermittent cessation of permeation, has been incorporated in many membrane bioreactor (MBR) designs and some other submerged HF systems as a standard operating protocol to control membrane fouling [93,94,288]. For example, the investigation of an MBR found that relaxation was still beneficial even when the relaxation necessitated periods of higher flux to give the same production of permeate [288].…”

Section: Relaxationmentioning

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: Techniques For Fouling Control In Dead-end Submerged Membranmentioning

confidence: 99%

Section: Fouling In Submerged Dead-end Filtrationmentioning

confidence: 99%

Section: Relaxationmentioning

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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“…Research and development of new membrane materials is an effective way to suppress the fouling membrane. Membrane materials should be commercially available, have a thermal stability and good chemical resistance against acids and bases as well as good mechanical strength and characteristics [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Transport Properties, Mechanical Behavior, Thermal and Chemical Resistance of Asymmetric Flat Sheet Membrane Prepared from PSf/PVDF Blended Membrane on Gauze Supporting Layer

et al. 2018

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“…However, some authors have reported positive impact (Brookes and Jefferson 2006), and some observed insignificant impact (Hong et al 2002;Lesjean et al 2005). MLVSS/MLSS ratio was also analyzed to find out the effect of organic content on membrane fouling.…”

Section: Effect Of Hrt On Biomass Concentration and Tmpmentioning

confidence: 99%

Treatment of wastewater from biodiesel plants using microbiological reactor technology

Khan

Yamsaengsung

Chetpattananondh

et al. 2014

Int. J. Environ. Sci. Technol.

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The objective of this paper was to introduce the aerobic microbiological reactor technology for wastewater treatment of biodiesel plants and find out the key factors that are involved in membrane fouling. The research was carried out in two steps. In the first step, sulfuric acid of pH 2, 2.5 and 3 was added to biodiesel wastewater and significant reduction in organic pollutants was observed at pH 2.5 such as chemical oxygen demand, and oil and grease were found to be 74-84 and 84.2-92.6 %, respectively. In the second step, microbiological reactor was operated at different hydraulic retention times of 15, 12, 9 and 6 h along with an increase in organic loading rates (range 1-3 g/L day) on individual hydraulic retention times. However, overall chemical oxygen demand and oil and grease removal efficiency remained in the range of 91.7-97.20 and 95.5-97.9 %, respectively, throughout the experiment, while severe membrane fouling was observed with decreasing hydraulic retention time due to decrease in dissolved oxygen concentration and increase in mixed liquid suspended solids, and soluble microbial product containing protein and polysaccharide. At lower hydraulic retention time of 6 h, an increase in particle size was reported as 27.9-62.7 lm, and soluble microbial product containing protein and polysaccharide reported as 20-60 and 19-59 mg/L, respectively. Higher soluble microbial product level led to increase in particle size with irregular shape, which led to severe membrane fouling.

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Fouling control in activated sludge submerged hollow fiber membrane bioreactors

Cited by 269 publications

References 15 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

Transport Properties, Mechanical Behavior, Thermal and Chemical Resistance of Asymmetric Flat Sheet Membrane Prepared from PSf/PVDF Blended Membrane on Gauze Supporting Layer

Treatment of wastewater from biodiesel plants using microbiological reactor technology

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