Quantitative biofouling diagnosis in full scale nanofiltration and reverse osmosis installations


Vrouwenvelder, J.S. and Manolarakis, S.A. and Hoek, J.P. van der and Paassen, J.A.M. van and Meer, W.G.J. van der and Agtmaal, J.M.C. van and Prummel, H.D.M. and Kruithof, J.C. and Loosdrecht, M.C.M. (2008) Quantitative biofouling diagnosis in full scale nanofiltration and reverse osmosis installations. Water Research, 42 (19). pp. 4856-4868. ISSN 0043-1354

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Abstract:Biofilm accumulation in nanofiltration and reverse osmosis membrane elements results in a relative increase of normalised pressure drop (ΔNPD). However, an increase in ΔNPD is not exclusively linked to biofouling. In order to quantify biofouling, the biomass parameters adenosine triphosphate (ATP), total cell count and heterotrophic plate count in membrane elements were investigated during membrane autopsies and compared with ΔNPD in test rigs and 15 full scale investigations with different types of feed water. The combination of biomass related parameters ATP and total cell count in membrane elements seem to be suitable parameters for diagnosis of biofouling, whereas plate counts were not appropriate to assess biofouling. The applied ΔNPD measurement was too insensitive for early detection of fouling. Measurements of biological parameters in the water were shown to be not appropriate in quantifying biofouling. Evidently, there is a need for a practical tool, sensitive pressure drop data and systematic research.
Item Type:Article
Copyright:© 2008 Elsevier
Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/79064
Official URL:https://doi.org/10.1016/j.watres.2008.09.002
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