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Title: Study on the removal of biodegradable NOM from seawater using biofiltration
Author: Simón, Francesc Xavier
Rudé i Payró, Elisabet
Llorens Llacuna, Joan
Baig, Sylvie
Keywords: Aigua de mar
Contaminació de l'aigua
Enginyeria química
Water pollution
Chemical engineering
Issue Date: 2013
Publisher: Elsevier B.V.
Abstract: 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.
Note: Versió postprint del document publicat a:
It is part of: Desalination, 2013, vol. 316, p. 8-16
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ISSN: 0011-9164
Appears in Collections:Articles publicats en revistes (Enginyeria Química i Química Analítica)

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