Environmental Engineering Reference
In-Depth Information
deployed today. Phase separation methods will likely always play a key role in bilge water
treatment. Recent developments using modiied meshes for oil-water separation look
promising, especially because of the low cost of the substrates and high low rates. These
technologies still need to be scaled and pilot tested. Of the nanotechnological approaches
reported within, only swellable organosilica is commercially available. Sorbents have
good potential because of their ability to remove dissolved or highly emulsiied organics.
However, owing to the amount of media that is required for primary treatment, it is likely
that sorbent media will be used as a polishing step after physical separation. Regeneration
of sorbents would be attractive for economical and logistical reasons.
As the complexity of bilge water composition increases, the need for new technology will
also increase, especially if environmental protection measures are pursued. It is expected
that in the future bilge water treatment will require multistep treatment systems to achieve
high water quality in an economical fashion. This will require an analysis of how different
technologies work in tandem, rather than separately. For instance, addition of locculants
in upstream processing may have detrimental effects on nanocomposite membrane tech-
nologies used for secondary treatment or polishing. Regardless, innovations in oil-water
separation using nanotechnology are providing a promising outlook for new and effective
methods of bilge water treatment.
References
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2008. Available at http://www.epa.gov/owow/oceans/cruise_ships/disch_assess.html.
3. Ochrony, K., Morskiego, Ś., Battyckiego, M. Report of the Seminar on Reception Facilities
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4. International Maritime Organization. International Convention for the Prevention of Pollution
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5. Port of Long Beach and Port of Los Angeles Vessel Discharge Rules and Regulations, May 2012,
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6. Available at http://www.portolosangeles.org/maritime/tonnage.asp.
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Canadian Journal of Fisheries and Aquatic Sciences
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Industrial Wastewater Treatment Technology
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