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Study on the removal of biodegradable NOM from seawater using biofiltration
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Despite the low biodegradability of seawater NOM, problems associated with biofouling are common in facilities that handle seawater. In this work, a fixed-film aerobic biofilter is proposed as an effective unit for preventing biofouling in such facilities. A packed-bed biofilter with an EBCT = 6 - 11 min was employed. The results demonstrated that the DOC is reduced by 6% and the BOD7 is reduced up to 15%. The LC-OCD analysis revealed that biofiltration abates the LMW neutrals and biopolymer fractions by 33 and 17%, respectively. However, the fractionation with UF membrane showed that the biofiltration process is able to degrade the more biodegradable compounds that have molecular weights that are greater than 1 kDa and compounds with molecular weights of less than 1 kDa. After biofiltration, the biological activity measured in terms of ATP removal was reduced by 60%. Finally, a test to evaluate the biofilm formation capacity of a water sample revealed reductions of ~94% when comparing biofiltered and non-biofiltered seawater. Therefore, a fixed-film aerobic biofiltration process could be a useful treatment for the removal of biodegradable organic matter from seawater and for improving the water quality in terms of less biofilm formation capacity.
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SIMÓN, Francesc xavier, RUDÉ I PAYRÓ, Elisabet, LLORENS LLACUNA, Joan, BAIG, Sylvie. Study on the removal of biodegradable NOM from seawater using biofiltration. _Desalination_. 2013. Vol. 316, núm. 8-16. [consulta: 30 de gener de 2026]. ISSN: 0011-9164. [Disponible a: https://hdl.handle.net/2445/45687]