Does Chlorination of Seawater Reverse Osmosis Membranes Control Biofouling?
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ArticleKAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionEnvironmental Microbial Safety and Biotechnology Lab
Environmental Science and Engineering Program
Water Desalination and Reuse Research Center (WDRC)
Date
2015-04-11Online Publication Date
2015-04-11Print Publication Date
2015-07Permanent link to this record
http://hdl.handle.net/10754/550087
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Biofouling is the major problem of reverse osmosis (RO) membranes used for desalting seawater (SW). The use of chlorine is a conventional and common practice to control/prevent biofouling. Unlike polyamide RO membranes, cellulose triacetate (CTA) RO membranes display a high chlorine tolerance. Due to this characteristic, CTA membranes are used in most of the RO plants located in the Middle East region where the elevated seawater temperature and water quality promote the risk of membrane biofouling. However, there is no detailed study on the investigation/characterization of CTA-RO membrane fouling. In this investigation, the fouling profile of a full–scale SWRO desalination plant operating with not only continuous chlorination of raw seawater but also intermittent chlorination of CTA-RO membranes was studied. Detailed water quality and membrane fouling analyses were conducted. Profiles of microbiological, inorganic, and organic constituents of analysed fouling layers were extensively discussed. Our results clearly identified biofilm development on these membranes. The incapability of chlorination on preventing biofilm formation on SWRO membranes could be assigned to its failure in effectively reaching throughout the different regions of the permeators. This failure could have occurred due to three main factors: plugging of membrane fibers, chlorine consumption by organics accumulated on the front side fibers, or chlorine adaptation of certain bacterial populations.Citation
Khan, Muhammad Tariq, Pei-Ying Hong, Nabil Nada, and Jean Philippe Croue. "Does Chlorination of Seawater Reverse Osmosis Membranes Control Biofouling?." Water Research (2015).Publisher
Elsevier BVJournal
Water ResearchPubMed ID
25917390Additional Links
http://linkinghub.elsevier.com/retrieve/pii/S0043135415002195ae974a485f413a2113503eed53cd6c53
10.1016/j.watres.2015.03.029
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