Dynamics of microbial communities in an integrated ultrafiltration–reverse osmosis desalination pilot plant located at the Arabian Gulf

Hong, Pei‐Ying; Moosa, Nasir; Mink, Justine E.

doi:10.1080/19443994.2015.1083483

Cited by 18 publications

(15 citation statements)

References 45 publications

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“…Physical pretreatment is less expensive than traditional chemical pretreatment since no additional chemicals need to be added, this includes the additional costs of the UF membranes [71]. Hollow fiber UF technology has increasingly gained acceptance as a viable alternative for seawater pretreatment [72][73][74]. Reasons for the increasing interest in UF pretreatment over conventional approaches include superior and more consistent filtrate water quality, ability to cope with variable feed water quality, lower plant footprint, and competitive cost [72].…”

Section: Fouling Mitigation Strategies I Pretreatmentmentioning

confidence: 99%

“…UF membranes with a pore size of 0.02 µm have been the most effective for removing silt, algae, bacteria, and large molecular weight organics [70]. For example, Hong et al [74] demonstrated that the UF pretreatment achieved 1.96-log removal of bacterial cells. The permeate stream must have a turbidity below 0.1 NTU and a 15 min.…”

Section: Fouling Mitigation Strategies I Pretreatmentmentioning

confidence: 99%

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Critical aspects of RO desalination: A combination strategy

et al. 2017

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Due to a significant drop in the energy needed for RO desalination from 12 kWh/m 3 to ~2 kWh/m 3 over the past 20 years, which is close to 1 kWh/m 3 , the theoretical minimum for recovering salt-free water from seawater, the focus here is on the critical aspects that offer opportunities to further reduce costs. These include pre-and post-treatment; and analysis and optimization of the performance of RO systems, such as selectivity, capacity, and flux decline. Flux decline includes concentration polarization and fouling from inorganic, organic, biological constituents. We call these the "three legs' that undergird all membrane processes. The approach here is quantitative and includes detailed fluid mechanics and associated mass transfer of RO systems for optimizing performance.

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Section: Fouling Mitigation Strategies I Pretreatmentmentioning

confidence: 99%

Section: Fouling Mitigation Strategies I Pretreatmentmentioning

confidence: 99%

Critical aspects of RO desalination: A combination strategy

et al. 2017

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“…Metabisulfite is commonly added to neutralize chlorine or other oxidizing biocides in desalination plants in order to protect the integrity of the membranes used. However, excess sulfate can select for SRB, which can produce corrosive hydrogen sulfide that damages membrane integrity [18]. …”

Section: Introductionmentioning

confidence: 99%

Quorum Sensing and the Use of Quorum Quenchers as Natural Biocides to Inhibit Sulfate-Reducing Bacteria

2016

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Sulfate-reducing bacteria (SRB) are one of the main protagonist groups of biocorrosion in the seawater environment. Given their principal role in biocorrosion, it remains a crucial task to develop strategies to reduce the abundance of SRBs. Conventional approaches include the use of biocides and antibiotics, which can impose health, safety, and environmental concerns. This review examines an alternative approach to this problem. This is achieved by reviewing the role of quorum sensing (QS) in SRB populations and its impact on the biofilm formation process. Genome databases of SRBs are mined to look for putative QS systems and homologous protein sequences representative of autoinducer receptors or synthases. Subsequently, this review puts forward the potential use of quorum quenchers as natural biocides against SRBs and outlines the potential strategies for the implementation of this approach.

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“…and Desulfovibrio spp. were identified on fouled ultrafiltration (UF) and RO membranes sampled from a SWRO pilot plant located in the Arabian Gulf (Hong et al, 2016 ). Pseudomonas spp.…”

Section: Introductionmentioning

confidence: 99%

“…and other sulfate-reducing bacteria (SRB) by depleting oxygen. In addition, SRB and Pseudomonas aeruginosa are able to reduce sulfate and thiosulfate, respectively, to produce hydrogen sulfide, a corrosive and toxic gas (Hong et al, 2016 ). The presence of Pseudomonas spp.…”

Section: Introductionmentioning

confidence: 99%

Bacteriophage Infectivity Against Pseudomonas aeruginosa in Saline Conditions

et al. 2018

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Pseudomonas aeruginosa is a ubiquitous member of marine biofilm, and reduces thiosulfate to produce toxic hydrogen sulfide gas. In this study, lytic bacteriophages were isolated and applied to inhibit the growth of P. aeruginosa in planktonic mode at different temperature, pH, and salinity. Bacteriophages showed optimal infectivity at a multiplicity of infection of 10 in saline conditions, and demonstrated lytic abilities over all tested temperature (25, 30, 37, and 45°C) and pH 6–9. Planktonic P. aeruginosa exhibited significantly longer lag phase and lower specific growth rates upon exposure to bacteriophages. Bacteriophages were subsequently applied to P. aeruginosa-enriched biofilm and were determined to lower the relative abundance of Pseudomonas-related taxa from 0.17 to 5.58% in controls to 0.01–0.61% in treated microbial communities. The relative abundance of Alphaproteobacteria, Pseudoalteromonas, and Planococcaceae decreased, possibly due to the phage-induced disruption of the biofilm matrix. Lastly, when applied to mitigate biofouling of ultrafiltration membranes, bacteriophages were determined to reduce the transmembrane pressure increase by 18% when utilized alone, and by 49% when used in combination with citric acid. The combined treatment was more effective compared with the citric acid treatment alone, which reported ca. 30% transmembrane pressure reduction. Collectively, the findings demonstrated that bacteriophages can be used as a biocidal agent to mitigate undesirable P. aeruginosa-associated problems in seawater applications.

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Dynamics of microbial communities in an integrated ultrafiltration–reverse osmosis desalination pilot plant located at the Arabian Gulf

Cited by 18 publications

References 45 publications

Critical aspects of RO desalination: A combination strategy

Critical aspects of RO desalination: A combination strategy

Quorum Sensing and the Use of Quorum Quenchers as Natural Biocides to Inhibit Sulfate-Reducing Bacteria

Bacteriophage Infectivity Against Pseudomonas aeruginosa in Saline Conditions

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