Seawater reverse osmosis desalination and (harmful) algal blooms
Villacorte, Loreen O.
Alizadeh Tabatabai, S. Assiyeh
Anderson, Donald M.
Amy, Gary L.
Schippers, Jan C.
Kennedy, Maria D.
MetadataShow full item record
KeywordSeawater reverse osmosis (SWRO); Harmful algal blooms (HAB); Pretreatment; Coagulation; Ultrafiltration (UF); Subsurface intake
This article reviews the occurrence of HABs in seawater, their effects on the operation of seawater reverse osmosis (SWRO) plants, the indicators for quantifying/predicting these effects, and the pretreatment strategies for mitigating operational issues during algal blooms. The potential issues in SWRO plants during HABs are particulate/organic fouling of pretreatment systems and biological fouling of RO membranes, mainly due to accumulation of algal organic matter (AOM). The presence of HAB toxins in desalinated water is also a potential concern but only at very low concentrations. Monitoring algal cell density, AOM concentrations and membrane fouling indices is a promising approach to assess the quality of SWRO feedwater and performance of the pretreatment system. When geological condition is favourable, subsurface intake can be a robust pretreatment for SWRO during HABs. Existing SWRO plants with open intake and are fitted with granular media filtration can improve performance in terms of capacity and product water quality, if preceded by dissolved air flotation or sedimentation. However, the application of advanced pretreatment using ultrafiltration membrane with in‐line coagulation is often a better option as it is capable of maintaining stable operation and better RO feed water quality during algal bloom periods with significantly lower chemical consumption.
Author Posting. © The Author(s), 2015. This is the author's version of the work. It is posted here by permission of Elsevier for personal use, not for redistribution. The definitive version was published in Desalination 360 (2015): 61-80, doi:10.1016/j.desal.2015.01.007.
Suggested CitationPreprint: Villacorte, Loreen O., Alizadeh Tabatabai, S. Assiyeh, Anderson, Donald M., Amy, Gary L., Schippers, Jan C., Kennedy, Maria D., "Seawater reverse osmosis desalination and (harmful) algal blooms", 2015-01, https://doi.org/10.1016/j.desal.2015.01.007, https://hdl.handle.net/1912/7240
Showing items related by title, author, creator and subject.
Beaulieu, Stace E.; Sengco, Mario R.; Anderson, Donald M. (2003-12-21)Harmful algal blooms (HABs) may be legitimate targets for direct control or mitigation, due to their impacts on commercial fisheries and public health. One promising control strategy is the rapid sedimentation of HABs ...
Dunlea, Ann G.; Murray, Richard W.; Santiago Ramos, Danielle; Higgins, John A. (Nature Publishing Group, 2017-10-10)Authigenic clay minerals formed on or in the seafloor occur in every type of marine sediment. They are recognized to be a major sink of many elements in the ocean but are difficult to study directly due to dilution by ...
The aggregation of clay minerals and marine microalgal cells : physicochemical theory and implications for controlling harmful algal blooms Sengco, Mario R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2001-09)In recent years, the use of clay minerals has emerged as one of the most promising strategies for directly controlling harmful algal blooms (HABs). Its principle is based on the mutual aggregation of algal cells and ...