Exploring microbial communities and differences of cartridge filters (CFs) and reverse osmosis (RO) membranes for seawater desalination processes

Chun, Youngpil; Ha, Phuc Thi; Powell, Lydia C.; Lee, Jinwook; Kim, Dae–Hee; Choi, Donggeon; Lovitt, Robert W.; Kim, In Soo; Mitra, Sambu Saran; Chang, In Seop

doi:10.1016/j.desal.2012.05.007

Cited by 29 publications

(21 citation statements)

References 33 publications

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“…The proportion of unknown group grew from 3.1% in the seawater sample to 10.9% in the RO sample (refer to Table 2). This result supports the complexity of the microbial community of RO sample as presented in our previous study [29]. In the seawater samples, 9 and 4 isolates were closely related to Alcanivorax sp.…”

Section: Bacterial Isolatessupporting

confidence: 91%

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Adhesion potential of bacteria retrieved from intake seawater and membrane biofilms on full-scale reverse osmosis desalination process

Chun

Choi

Kim

et al. 2016

Desalination and Water Treatment

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A B S T R A C TMicro-organisms were isolated from intake seawater and reverse osmosis (RO) membrane biofilms collected from a full-scale membrane-based desalination process. The results from a culture-dependent approach using 12 media were combined with the microbial community structure on fouled RO membranes as analyzed by a 16S rRNA clone library construction in our previous study. This was followed by selection of 11 target bacteria for further analysis, which were suspected to be responsible for biofilm formation on membrane surfaces. The adhesion of potential biofoulants differing in surface hydrophobicity and charge was examined. Cell wall hydrophobicity was measured as the contact angle of a lawn of bacteria, and by adhesion to hexadecane. The cell surface charge was investigated by measuring electrophoretic mobility. The data obtained from these methodologies were compared. According to the cell surface charge measurements, Pseudomonas aeruginosa, Acinetobacter venetianus, Cellvibrio mixtus subsp. Mixtus, Bacillus sp. Eur1 9.5, and Escherichia coli K12 could mediate initial adhesion to negatively charged RO membranes through electrostatic attraction. Limnobacter sp. KNF002, A. venetianus, and Simiduia agarivorans showed higher affinity to hexadecane than other bacterial strains tested, and Bacillus sp. Eur1 9.5, C. mixtus subsp. Mixtus, and P. aeruginosa were determined to have greater hydrophobic interactions with hydrophobic RO membranes.

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Section: Bacterial Isolatessupporting

confidence: 91%

“…A colony polymerase chain reaction (PCR) technique was employed for identification of isolates as described in our previous study [29]. In short, colony PCR was performed using one pair of vector primers; M13f (5´-GTT TTC CCA GTC ACG AC-3´), and M13r (5´-TCA CAC AGG AAA CAG CTA TGA C-3´).…”

Section: Isolation and Identification Of Biofilm Bacteriamentioning

confidence: 99%

Adhesion potential of bacteria retrieved from intake seawater and membrane biofilms on full-scale reverse osmosis desalination process

Chun

Choi

Kim

et al. 2016

Desalination and Water Treatment

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“…However, the bacterial population measured by HPC only accounted for about 0.2-1.9% of the cell population calculated by ATP measurements. This is due to the low culturability of environmental microorganisms under standard laboratory conditions when culture-dependant technique is used [48]. In other words, ATP measurement provides more sensitive assay results at a lower concentration of bacterial biomass where a bacterial population in M1 was not detectable by HPC.…”

Section: Atp Measurementsmentioning

confidence: 98%

A case study of fouling development and flux reversibility of treating actual lake water by forward osmosis process

et al. 2015

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“…High-throughput sequencing technology can be used to address all three questions by providing insights on the dynamics of microbial populations on the membranes and in the water samples collected along the desalination process. However, most of these studies were performed on seawater in other geographical locations which has water quality distinct from that in the Arabian Gulf [8,[10][11][12] and limited studies were conducted on the Arabian Gulf waters [13].…”

Section: Introductionmentioning

confidence: 99%

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

Hong

Moosa

Mink

2015

Desalination and Water Treatment

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This study demonstrated the use of high-throughput sequencing to assess the efficacy of an integrated Ultrafiltration (UF)-Reverse Osmosis (RO) desalination pilot plant located at the Arabian Gulf, and to identify potential microbial-associated problems that may arise in this plant.When integrated into the desalination treatment system, the UF membranes were able to serve as a good pretreatment strategy to delay RO fouling by achieving up to 1.96-log removal of cells from the seawater. Consequently, the differential pressure of the RO membrane remained around 1 bar for the entire 6-month study, suggesting no significant biofouling performance issue identified for this RO system. Examples of microbial populations effectively removed by the UF membranes from the feed waters included Nitrosoarchaeum limnia and phototrophic eukaryotes.Microbial-associated problems observed in this pilot plant included the presence of Pseudomonas spp. in coexistence with Desulfovibrio spp. These two bacterial populations can reduce sulfate and produce hydrogen sulfide, which would in turn cause corrosion problems or compromise membrane integrities. Chemical-enhanced backwashing (CEB) can be used as an effective strategy to minimize the associated microbial problems by removing bacterial populations including sulfate-reducers from the UF membranes.

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Exploring microbial communities and differences of cartridge filters (CFs) and reverse osmosis (RO) membranes for seawater desalination processes

Cited by 29 publications

References 33 publications

Adhesion potential of bacteria retrieved from intake seawater and membrane biofilms on full-scale reverse osmosis desalination process

Adhesion potential of bacteria retrieved from intake seawater and membrane biofilms on full-scale reverse osmosis desalination process

A case study of fouling development and flux reversibility of treating actual lake water by forward osmosis process

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

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