Membrane bioreactor for the drinking water treatment of polluted surface water supplies

Li, Xiaoyan; Chu, Hiu Ping

doi:10.1016/s0043-1354(03)00424-x

Cited by 147 publications

(63 citation statements)

References 34 publications

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“…Mansell et al [121] reported achievement of five-log virus inactivation with free chlorine dosing to MBR effluent at concentrations one-tenth of 450 mg Cl2-min/L, which is the minimum value required by California Water Recycling Criteria (Title 22) for all chlorine disinfection processes. Li et al [122] found that after treatment by MBR with a short HRT of less than an hour, the required dose of chlorine for the effluent to reach the drinking water standard was reduced from 22.3 ± 5.1 to 0.5 ± 0.1 mg/L. Hirani et al [17] reported that despite the passage of microbes in higher concentrations through a breached membrane (filtrate turbidity of 1.0 NTU) of an MBR, a free chlorine dose of 30 mg-min/L was sufficient to achieve greater than five-log removal of seeded MS2 bacteriophage and removal of total coliform bacteria at or below the detection limit.…”

Section: Requirement Of Post-disinfectionmentioning

confidence: 99%

Removal of Pathogens by Membrane Bioreactors: A Review of the Mechanisms, Influencing Factors and Reduction in Chemical Disinfectant Dosing

Hai

Riley

Shawkat

et al. 2014

Water

109

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Abstract:The continued depletion of fresh drinking water resources throughout the world has increased the need for a variety of water treatment and recycling strategies. Conventional wastewater treatment processes rely on extensive chemical post-disinfection to comply with the stringent microbiological safety for water reuse. When well designed and operated, membrane bioreactors (MBRs) can consistently achieve efficient removals of suspended solids, protozoa and coliform bacteria. Under optimal conditions, MBR systems can also significantly remove various viruses and phages. This paper provides an in-depth overview of the mechanisms and influencing factors of pathogen removal by MBR and highlights practical issues, such as reduced chemical disinfectant dosing requirements and associated economic and environmental benefits. Special attention has been paid to the aspects, such as membrane cleaning, membrane imperfections/breach and microbial regrowth, in the distribution system on the overall pathogen removal performance of MBR.

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Section: Requirement Of Post-disinfectionmentioning

confidence: 99%

Removal of Pathogens by Membrane Bioreactors: A Review of the Mechanisms, Influencing Factors and Reduction in Chemical Disinfectant Dosing

Hai

Riley

Shawkat

et al. 2014

Water

109

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“…The biological removal of nitrate can be affected by various factors: different types of external C sources [6,7], various types of micro-organisms [6,8], various operational parameters such as C/N ratios [2,9,10], temperature [3,[11][12][13], pH [3,11], dissolved oxygen [12,14,15], hydraulic retention time [16][17][18], nitrate and nitrite concentratios [11,19] and mixed liquor suspended solids [10,20]. In addition, nitrate removal highly depends on the substrate amount that influences the denitrification rate, denitrification yield, and the composition of the microflora [6,21].…”

Section: Introductionmentioning

confidence: 99%

“…Nitrate removal from contaminated groundwater, drinking water, and surface water has been examined by using extractive MBRs [26], ion-exchange and gas-transfer MBRs [20], pressure-driven MBRs [10,16,20] and other known hybrid systems. The Zenon ZW 10 membrane bioreactor was used in the denitrification of drinking water sources by Buttiglieri et al [27].…”

Section: Introductionmentioning

confidence: 99%

A kinetic study on drinking water denitrification using a membrane bioreactor

2015

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This study determines the basic parameters of Monod kinetics for microbial growth within a membrane bioreactor using the Zenon ZeeWeed 10 MBR system. The influent nitrate concentration was kept at 70 ± 2 mg L -1 NO 3ˉ. During the experiments a constant concentration of activated sludge was maintained at approximately 0.76 g L -1 under anoxic conditions. Sucrose was added to the activated sludge as a carbon source. The Monod kinetic parameters were calculated by numerical interpolation, by considering experimental data. The maximum specific growth rate of the biomass was determined to be 0.31 h

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“…1932-1058/2014/8(1)/014105/12/$30.00 V C 2014 AIP Publishing LLC 8, 014105-1 be maximized (Lebleu et al, 2009), while the formation of biofilm on the membrane surface has to be avoided (Li and Chu, 2003).…”

Section: Introductionmentioning

confidence: 99%

Impact of tortuous flow on bacteria streamer development in microfluidic system during filtration

et al. 2014

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The way in which bacterial communities colonize flow in porous media is of importance, but basic knowledge on the dynamic of these phenomena is still missing. The aim of this work is to develop microfluidic experiments in order to progress in the understanding of bacteria capture in filters and membranes. PDMS microfluidic devices mimicking filtration processes have been developed to allow a direct dynamic observation of bacteria across 10 or 20 lm width microchannels. When filtered in such devices, bacteria behave surprisingly: Escherichia coli, Pseudomonas aeruginosa or Staphylococcus aureus accumulate in the downstream zone of the filter and form large streamers which oscillate in the flow. In this study, streamer formation is put in evidence for bacteria suspension in non nutritive conditions in less than 1 h. This result is totally different from the one observed in same system with "inert" particles or dead bacteria which are captured in the bottleneck zone and are accumulated in the upstream zone. Observations within different flow geometries (straight channels, connected channels, and staggered row pillars) show that the bacteria streamer development is influenced by the flow configuration and, particularly by the presence of tortuosity within the microchannels zone. These results are discussed at the light of 3D flow simulations. In confined systems and in laminar flow, there is secondary flow (z-velocities) superimposed to the streamwise motion (in xy plane). The presence of the secondary flow in the microsystems has an effect on the bacterial adhesion. A scenario in three steps is established to describe the formation of the streamers and to explain the positive effect of tortuous flow on the development kinetics. V C 2014 AIP Publishing LLC. [http://dx

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Membrane bioreactor for the drinking water treatment of polluted surface water supplies

Cited by 147 publications

References 34 publications

Removal of Pathogens by Membrane Bioreactors: A Review of the Mechanisms, Influencing Factors and Reduction in Chemical Disinfectant Dosing

Removal of Pathogens by Membrane Bioreactors: A Review of the Mechanisms, Influencing Factors and Reduction in Chemical Disinfectant Dosing

A kinetic study on drinking water denitrification using a membrane bioreactor

Impact of tortuous flow on bacteria streamer development in microfluidic system during filtration

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