Why low powdered activated carbon addition reduces membrane fouling in MBRs

Remy, Maxime; Potier, Virginie; Temmink, Hardy; Rulkens, W.H.

doi:10.1016/j.watres.2009.09.046

Cited by 104 publications

(32 citation statements)

References 28 publications

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“…The use of powdered activated carbon (PAC) is primarily targeted for mitigating organic accumulation, biological degradation, and reducing the cake-resistance (e.g., [245][246][247][248][249][250][251][252][253]), all of which contribute towards improving the permeate flux. Almost as an afterthought, PAC also was recognized as being beneficial for inducing fouling-mitigating shear on the membrane [254][255][256][257]. Because the increased inertia associated with larger-sized particles can lead to more effective scouring, granular activated carbon (GAC), whose mean diameter is an order-of-magnitude larger than that of PAC, has recently gained interest [24,130,[257][258][259][260][261][262][263][264].…”

Section: Particle Scouringmentioning

confidence: 99%

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: Particle Scouringmentioning

confidence: 99%

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

et al. 2017

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“…Although there is no clear agreement regarding the exact phenomena occurring on the membrane interface during activated sludge filtration, membrane fouling in MBRs has been mainly attributed to Extracellular Polymeric Substances (EPS) (Le-Clech et al, 2006), the structural construction material for microbial aggregates. In order to minimize and control the negative effect of membrane bioreactor fouling, different methods have been developed and tested, including the addition of Powdered Activated Carbon (PAC) (Khan et al, 2012;Remya et al, 2010) metal salts (Zhang et al, 2008), organic and inorganic polyelectrolytes (Dizge et a., 2011) and biopolymer (Koseoglu, 2008) in the mixed liquor.…”

Section: Introductionmentioning

confidence: 99%

Comparison between a conventional membrane bioreactor (C-MBR) and a biofilm membrane bioreactor (BF-MBR) for domestic wastewater treatment

Subtil

Mierzwa

Hespanhol

2014

Braz. J. Chem. Eng.

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-In this paper, the influence of biofilm carriers in a MBR on the performance of organic matter and nitrogen removal and the influence on membrane fouling were evaluated. The configurations studied included a Conventional Membrane Bioreactor (C-MBR) and a Biofilm Membrane Bioreactor (BF-MBR) operated in parallel, both fed with domestic wastewater. Regarding organic matter removal, no statistically significant differences were observed between C-MBR and BF-MBR, producing an effluent with a Soluble COD concentration of 27 ± 9.0 mgO 2 /L and 26 ±1.0 mgO 2 /L and BOD concentration of 6.0 ± 2.5 mgO 2 /L and 6.2 ± 2.1 mgO 2 /L, respectively. On the other hand, the BF-MBR produced a permeate with lower ammonia and total nitrogen concentrations, which resulted in a removal efficiency of 98% and 73%, respectively. It was also observed that the fouling rate was about 35% higher in the C-MBR than that for the BF-MBR, which also presented a reduction of total membrane resistance, about 29%, and increased operational cycle length around 7 days, compared to C-MBR.

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“…Soluble microbial products (SMP), which is believed identical to soluble EPS, are high molecular weight compounds released during cell lysis and cell growth, creating high resistance of the membrane and leading to a decline of permeate flux. Thus, investigation of EPS and SMP is an important issue in reducing membrane fouling in MBR [17,18]. However, there are only a few studies reporting process performance and investigation of EPS and SMP in the pre-denitrification MBR, especially for such system treating high-strength food wastewater.…”

Section: Introductionmentioning

confidence: 99%

Performance and Fouling in Pre-Denitrification Membrane Bioreactors Treating High-Strength Wastewater from Food Waste Disposers

Lee

Kim

et al. 2017

Water

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Abstract:The study investigated the performance of the pre-denitrification membrane bioreactor (MBR) process to treat high-strength wastewater generated from food waste disposals. Extracellular polymeric substances (EPS) as membrane foulant and microbial community profiles were analyzed under different hydraulic retention time (HRT) operation conditions. The pre-denitrification MBR was effective for treating food wastewater with high chemical oxygen demand (COD)/N resulting in high total nitrogen (TN) removal efficiency. The operational data showed that effluent qualities in terms of COD, TN, and TP improved with longer HRT. However, membrane fouling potential as shown by specific membrane fouling rate and specific resistance to filtration (SRF) increased as HRT increased. The longer HRT conditions or lower influent loading led to higher levels of bound EPS while HRT did not show large effects on the level of soluble microbial products (SMP). The restriction fragment length polymorphism (RFLP) analysis showed similar microbial banding patterns from the sludges generated under different HRT conditions, indicating that HRT had minimal effects on the composition of microbial communities in the system. All these results suggest that the MBR with pre-denitrification is a feasible option for treating high-strength food wastewater and that different HRT conditions could affect the operational performance and the fouling rate, which is governed via changes in microbial responses through EPS in the system.

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Why low powdered activated carbon addition reduces membrane fouling in MBRs

Cited by 104 publications

References 28 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

Comparison between a conventional membrane bioreactor (C-MBR) and a biofilm membrane bioreactor (BF-MBR) for domestic wastewater treatment

Performance and Fouling in Pre-Denitrification Membrane Bioreactors Treating High-Strength Wastewater from Food Waste Disposers

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