Advanced organic and biological analysis of dual media filtration used as a pretreatment in a full-scale seawater desalination plant
KAUST DepartmentWater Desalination and Reuse Research Center (WDRC)
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AbstractDual media filter (DMF) is being used as a primary pretreatment to remove particulate foulants at seawater desalination plants. However, many plants experience organic and biological fouling. The first part of this paper focuses on the monitoring of organic and biological foulants using advanced analytical techniques to optimize functioning of DMF at Perth Seawater Desalination Plant (PSDP) in Western Australia. In addition, microbial community analysis in DMF filtered seawater, and on DMF media (DMF-M) and cartridge filter (CF) was conducted using terminal restriction fragment length polymorphism (T-RFLP) and 454-pyrosequencing. In the full-scale DMF system, the bacterial community structure was clustered along with the filtration time and sampling positions. For the DMF effluent samples, the bacterial community structure significantly shifted after 4 h of filtration time, which corresponded with the permeability reduction trend. The dominant bacterial communities in the DMF effluent were OTU 13 (Phaeobacter) and OTU 19 (Oceaniserpentilla). The different biofilm-forming bacteria communities were found in the biofilm samples on DMF-M and CF. In the second part of the study, semi-pilot scale DMF columns were operated on-site under same operating conditions used in PSDP. It demonstrated the advantage of operating DMF at the biofiltration mode for improving the reduction of biofoulants. © 2016 Elsevier B.V.
CitationJeong S, Vollprecht R, Cho K, Leiknes T, Vigneswaran S, et al. (2016) Advanced organic and biological analysis of dual media filtration used as a pretreatment in a full-scale seawater desalination plant. Desalination 385: 83–92. Available: http://dx.doi.org/10.1016/j.desal.2016.02.017.
SponsorsThis study was supported by the National Centre of Excellence in Desalination Australia (NCEDA), which was funded by the Australian Government through Water for the Future initiative (Project code: 09148). The authors also acknowledge Mr. Damien Marwick (Degremont) and Ms. Ushi Jismi (Water Corporation) for their contribution to the sampling. PSDP is owned by Water Corporation while the operation and maintenance is conducted in alliances with Degremont and Suez Environment.